Display device for receiver

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention relates to a receiver display device for high frequency communication that displays signal intensities of a plurality of frequencies.

【0002】

[Conventional technology]

Figure 2 shows a conventional wireless receiver with a spectrum display function. In FIG. 2, the high-frequency signal received by the antenna 100 is input to the mixer 102 via the high-frequency amplifier (hereinafter referred to as RF amplifier) 101, and then mixed with the local oscillation signal generated by the local oscillator 103. The frequency is converted into a predetermined intermediate frequency signal (hereinafter referred to as IF signal). This IF signal is input to the FM demodulator 105 via an intermediate frequency amplifier (hereinafter referred to as IF amplifier) 104 and FM demodulated, and then the demodulated low frequency signal is referred to as a low frequency amplifier (hereinafter referred to as AF amplifier). .) Output to speaker 107 via 106. Further, the IF signal output from the IF amplifier 104 is envelope-detected by the detection circuit 108 and then output to the signal level meter 109, whereby the signal level of the received high-frequency signal is displayed on the signal level meter 109. Will be done.

【0003】

On the other hand, after the IF signal is input to the mixer 110, it is mixed with the sweep local oscillator signal generated by the sweep local oscillator 111 in a predetermined sweep frequency width, and frequency-converted into a sweep IF signal having the sweep frequency width. To. This sweep IF signal is envelope-detected by the detection circuit 113 via the slope IF amplifier 112, and the detection signal is input to the input terminal of the vertical axis of the CRT display 114. Further, the sweep local oscillator 111 output from the sweep local oscillator 111 is input to the horizontal sweep signal generator 115 including the PLL circuit, and the generator 115 is for the CRT display 114 synchronized with the input sweep local oscillator signal. The horizontal sweep signal of is generated and input to the input terminal of the horizontal axis of the CRT display 114. As a result, on the CRT display 114, the frequency spectrum of the signal received by the antenna 100 in the predetermined sweep frequency width centered on the center frequency of the received high frequency signal is displayed.

【0004】

Therefore, the circuits and devices of reference numerals 110 to 115 constitute a so-called spectrum analyzer for displaying the frequency spectrum, and while listening to the low frequency signal of the modulated wave included in the received high frequency signal with the speaker 107, It is possible to observe the frequency spectrum of the frequency of the high frequency signal and the frequency in the vicinity thereof.

【0005】

[Problems to be Solved by the Invention]

However, in the conventional wireless receiver with spectrum display function, the original signal receiving circuit that receives the high frequency signal of the first reception frequency from the RF amplifier 101 to the IF amplifier 104 and the scope IF amplifier 112 from the RF amplifier 101 Two receiving circuits to receive the first and second receiving frequencies, with a receiving circuit for spectrum display to receive the high frequency signal of the second receiving frequency to be swept, including another local oscillator 111 up to. Since it is provided, there is a problem that the circuit is complicated and the manufacturing cost is high. Further, in the conventional wireless receiver with a spectrum display function, since the local oscillator 111 and the local oscillator 115 operate in cooperation with each other, it is possible to observe the signal strength of a frequency continuously adjacent to the output signal of the mixer 102. However, it was impossible to observe the signal strengths of multiple frequencies set discretely.

【0006】

Further, in the conventional receiver with the spectrum display function, when the reception frequency is changed, the signal of the reception frequency corresponding to the display position is signaled even though the display position of the spectrum after the frequency change must be changed. Until the intensity was observed, there was an inconvenience that the signal intensity of the frequency before the frequency change was displayed.

【0007】

An object of the present invention is to solve the above problems, to display the signal strength of a plurality of frequencies which is a part of the reception frequencies of all the plurality of frequencies that can be received by the receiver, and to receive the signal. It is an object of the present invention to provide a receiver display device capable of shifting and changing the display position of the signal strength of the plurality of frequencies in response to a change in frequency.

【0008】

[Means for solving problems]

The receiver display device according to claim 1 according to the present invention selectively switches the reception frequency in an arbitrarily set switching order in the receiver display device that receives a high frequency signal at a predetermined reception frequency. , The detection and storage means for detecting and storing the signal strengths of the plurality of received reception frequencies, which are a part of all the plurality of reception frequencies that can be received by the receiver, and the plurality of N. A plurality of N display units corresponding to each of the reception frequencies are juxtaposed, and the signal strengths of the multiple N reception frequencies stored above are displayed on the plurality of N display units corresponding to the switching order. By shifting the signal strengths of the display means to be displayed and the signal strengths of the plurality of N reception frequencies stored in the detection and storage means by one each in response to the change of the reception frequency, the plurality of Ns displayed on the display means are displayed. After shifting the display position of the signal strength of each reception frequency, when the signal strength of the reception frequency is shifted, one signal strength data is lost in the detection storage means, while one signal strength data is empty. By detecting and storing the signal strength of the new reception frequency, the signal strength of the new reception frequency is controlled to be displayed on one display unit located at one end of the plurality of N display units. It is characterized by being provided with a control means.

【0009】

Further, the display device of the receiver according to claim 2 is the display device of the receiver according to claim 1, and the detection storage means is the above-mentioned at a predetermined step frequency in the receiver with a signal strength display function of a plurality of frequencies. The feature is that the reception frequency is switched in ascending or descending order.

【0010】

[Action]

With the above configuration, in the display device of the receiver according to claim 1, the detection storage means selectively switches the reception frequency in an arbitrarily set switching order, and the receiver automatically switches the reception frequency. The signal strengths of the plurality of received reception frequencies, which are a part of all the plurality of reception frequencies that can be received, are detected and stored, and the display means displays the plurality of N reception frequencies. A plurality of N display units corresponding to each of the above are juxtaposed, and the signal strengths of the plurality of stored N reception frequencies are displayed on the plurality of N display units corresponding to the switching order. Further, the control means is displayed on the display means by shifting the signal strengths of the plurality of N reception frequencies stored in the detection and storage means by one each in response to the change in the reception frequency. After shifting the display position of the signal strength of a plurality of N reception frequencies, when the signal strength of the reception frequency is shifted, one signal strength data is lost in the detection storage means, while one signal strength data is lost. By detecting and storing the signal strength of the new reception frequency that becomes empty, the signal strength of the new reception frequency is displayed on one display unit located at one end of the plurality of N display units. Control. As a result, the signal intensities of the plurality of reception frequencies are displayed on the plurality of display units of the display means in accordance with the switching order, and the signal intensities of the plurality of frequencies are displayed in response to the change in the reception frequency. The display position can be shifted and changed. Then, when the signal strength of the reception frequency is shifted, the data of one signal strength is lost in the detection storage means, but the data of one signal strength is vacant. The signal strength of the new reception frequency is detected and stored. By doing so, the signal strength of the new reception frequency can be displayed on one display unit located at one end of the plurality of N display units.

【0011】

Further, in the display device of the receiver according to claim 2, the detection and storage means switches the reception frequency in ascending order or descending order at a predetermined step frequency. As a result, the signal intensities of the plurality of reception frequencies are displayed in the plurality of display units of the display means, for example, juxtaposed in accordance with the switching order, that is, at the interval of the step frequencies. Further, the display position of the signal strength of the plurality of frequencies can be changed by shifting the step frequency in response to the change of the reception frequency.

【0012】

[Example]

Hereinafter, examples according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a "wireless transceiver with a signal level display function of a plurality of frequencies" which is an embodiment of the present invention. The wireless transceiver of this embodiment has the following operation modes.

【0013】

(a) VFO mode / memory channel mode The "VFO mode" is an operation mode in which the transmission / reception frequency is set as follows. Turn the dial of the rotary encoder 31 to send / receive frequency fset = f_RWhen is set, the above-set transmission / reception frequency f is used using a VFO (Variable Frequency Oscillator: specifically, the local oscillator 4 in this embodiment)._RLocal oscillation frequency f corresponding to_LWhen the dial of the rotary encoder 31 is rotated clockwise, the local oscillation frequency f is generated for each preset step frequency Δf._LChanges in the upward direction, which causes the transmission / reception frequency f_RChanges. Further, when the dial of the rotary encoder 31 is rotated counterclockwise, the local oscillation frequency f is set for each preset step frequency Δf._LChanges in the downward direction, which causes the transmission / reception frequency f_RChanges. Alternatively, instead of using the dial of the rotary encoder 31, when the transmission / reception frequency is directly input using the numeric keypad 32, the input transmission / reception frequency f_RLocal oscillation frequency f corresponding to_LA local oscillator signal with is generated by the local oscillator 4, and the transmission / reception frequency fset = f_RIs set.

【0014】

On the other hand, in the "memory channel mode", a plurality of transmission / reception frequencies are stored in advance in the memory in the MPU30 corresponding to each memory channel number, and one channel number is specified using the rotary encoder 31 or the ten-key 32. Corresponding transmission / reception frequency fset = f_RThis is the operation mode to set.

【0015】

(b) Normal mode / Search mode The "normal mode" is an operation mode for transmitting and receiving using the speaker 13 and the microphone 21 without displaying the level of the signal strength of a plurality of frequencies. On the other hand, the "search mode" is an operation mode for displaying the signal levels of received signals of a plurality of frequencies on the matrix display unit 61 of the liquid crystal display device (hereinafter referred to as LCD) 60. The level of signal strength is simply called the signal level.

【0016】

(c) Receivable mode / non-receivable mode The operation mode is valid only when the above search mode is set, and the "receivable mode" is an operation mode in which the received signal can be received by the speaker 13, while the "non-receivable mode" is. This is an operation mode set so that the speaker 13 cannot receive the received signal.

【0017】

(d) Normal mode / scan search mode The "normal mode" is the same as the normal mode of (c) above, and is an operation mode for transmitting and receiving using the speaker 13 and the microphone 21 without displaying the level of the signal strength of a plurality of frequencies. On the other hand, the "scan search mode" is an operation mode for displaying the signal levels of received signals of a plurality of frequencies on the matrix display unit 61 of the LCD 60. In the "search mode", the transmission / reception frequency is set to the step frequency selection key. The "scan search mode" cancels the automatic change to the higher frequency direction (hereinafter referred to as "upward direction") or the lower frequency direction (hereinafter referred to as "downward direction") for each step frequency set using 33. By shifting the signal level data of the multi-frequency reception signal stored in the VRAM 40 in response to the change in the transmission / reception frequency, the multi-frequency reception signal on the matrix display unit 61 of the LCD 60 is displayed. The display position of the signal level of is sequentially shifted upward or downward of the frequency and displayed. When setting the upward scan search mode, after turning on the normal mode / scan search mode selector switch SW5, turn the rotary encoder (hereinafter abbreviated as RE in the drawing) 31 clockwise when viewed from above. Turn (when the frequency is upward) or counterclockwise (when the frequency is downward). Hereinafter, the rotation direction of the rotary encoder 31 is shown in the rotation direction seen from above.

【0018】

The wireless transmitter / receiver with a signal level display function of a plurality of frequencies of this embodiment detects the IF signal output from the IF amplifier 6 by the detection circuit 19, and then is referred to as an analog / digital converter (hereinafter referred to as an A / D converter). ) 20 Converts to digital data, and the converted data is taken into the microprocessing unit (hereinafter referred to as MPU) 30 as signal level data SLD, and the local oscillation frequency f of the local oscillator 4 in the search mode and reception state._LLevel corresponding to capture sequentially altered so while the signal level data SLD to by writing Le display data in VRAM 40, transmission and reception frequencies f_RWhile listening to and receiving the low-frequency signal of the modulated wave of the high-frequency signal of the above on the speaker 13, the transmission / reception frequency f is displayed on the matrix display unit 61 of the LCD60._RIt is characterized by displaying signal levels of a plurality of frequencies centered on the signal level of.

【0019】

Here, in the VFO mode and the search mode, the lateral step frequency of the LCD 60 when displaying the signal levels of a plurality of frequencies is the step frequency Δf of the VFO mode preset in the wireless transmitter / receiver, and the present implementation is performed. In the example, the frequency (f) is from the left when facing the matrix display 61 of the LCD60._R-3Δf), frequency (f)_R-2Δf), frequency (f)_R-Δf), transmit / receive frequency f_R, Frequency (f_R+ Δf), frequency (f)_R+ 2Δf), and frequency (f)_RThe feature is that each signal level of + 3Δf) is displayed. On the other hand, in the memory channel mode and the search mode, when the currently set channel is the channel number m, in this embodiment, the channel number (m-3) is from the left when facing the matrix display unit 61 of the LCD60. Frequency, channel number (m-2) frequency, channel number (m-1) frequency, channel number m frequency, channel number (m + 1) frequency, channel number (m + 2) frequency, channel The feature is that each signal level of the frequency of the number (m + 3) is displayed.

【0020】

Further, in the reception state, in the search mode, as described above, the matrix display unit 61 of the LCD 60 displays the signal levels of a plurality of frequencies indicating the signal levels of the high frequency signals of the seven frequencies, which change in the vertical direction, while the normal mode is displayed. The feature is that the signal level of the high frequency signal being received, which changes in the horizontal direction, is displayed by using the lowermost 2 rows and 7 columns of the matrix display unit 61.

【0021】

Further, the transmitter / receiver of this embodiment automatically changes the transmission / reception frequency upward or downward for each step frequency set by using the step frequency selection key 33 by setting the scan search mode. This is repeated until the scan search mode is released, thereby shifting the signal level data of the received signals of multiple frequencies in the VRAM 40, thereby responding to the change in the transmitted / received frequency of the received signals of multiple frequencies. It is characterized in that the display position of the signal level of is sequentially shifted upward or downward of the frequency and displayed. When the transmission / reception frequency is changed upward in this scan search mode, the signal level display of the transmission / reception frequency is displayed at the right end of the matrix liquid crystal display unit 61 indicated by the center instruction liquid crystal display unit 63b in FIG. After being shifted to position, the transmission / reception frequencies are sequentially scanned upward, so that the corresponding signal level display position is sequentially shifted to the left as shown in FIG. 27. On the other hand, when changing downward, the signal level display of the transmission / reception frequency is shifted so as to be located at the left end of the matrix liquid crystal display unit 61 indicated by the center instruction liquid crystal display unit 63c in FIG. Since the frequencies are sequentially scanned downward, the corresponding signal level display position is sequentially shifted to the right as shown in FIG. 28.

【0022】

Further, when the transmitter / receiver of this embodiment is in the VFO mode and the search mode, the rotary encoder 31 is rotated clockwise or counterclockwise to rotate the rotary encoder 31 (the rotary encoder 31 is approximately every 30 °). There is a clip point in, and the rotation frequency increases each time it passes through the clip point.) The transmission / reception frequency is shifted upward or downward according to the change, and the above is stored in the VRAM 40 accordingly. By shifting the signal level data of the received signal of a plurality of frequencies in the search mode, the display position of the signal level of the received signal of a plurality of frequencies on the matrix display unit 61 of the LCD 60 is shifted and displayed. This operation is called a manual scan search as opposed to the "scan search mode" that is automatically performed.

【0023】

First, the configuration of the wireless transceiver with the signal level display function of multiple frequencies shown in FIG. 1 will be described.

【0024】

In FIG. 1, in the reception state, the high frequency signal received by the antenna 100 is input to the mixer 3 via the common terminal c of the transmission / reception switch 10 and its contact point a, and further via the RF amplifier 2, and is input by the local oscillator 4. Generated local oscillator frequency f_LA predetermined intermediate frequency f mixed with a locally oscillated signal having_IF(In this embodiment, f_IF= f_R-f_LIs set. After frequency conversion to an IF signal having)), it is input to the limiter amplifier 7 and the detection circuit 19 via a bandpass filter (BPF) 5 that passes only the IF signal and an IF amplifier 6. Here, the local oscillator 4 includes a PLL circuit, and the local oscillation frequency data Df output from the MPU30._LLocal oscillation frequency f based on_LGenerates a local oscillation signal and outputs it to the mixer 3 and the mixer 24. Further, the transmission / reception switching switch 10 is selectively switched to the contact a side or the contact b side based on the transmission / reception switching signal (hereinafter referred to as TRSW signal) output from the MPU 30. Here, when the TRSW signal is at the L level (in the flowchart, it is indicated by the control data 0 in the MPU30), the changeover switch 10 is switched to the contact a side, and the wireless transceiver is in the receiving state. When the TRSW signal is at H level (in the flowchart, it is indicated by the control data "1" in the MPU30), the changeover switch 10 is switched to the contact b side, and the wireless transceiver is in the transmission state.

【0025】

The IF signal input to the detection circuit 19 is envelope-detected, then converted to digital data by the A / D converter 20, and the signal level data SLD proportional to the signal level of the received high-frequency signal is input to the MPU30. Is taken in. On the other hand, the limiter amplifier 7 limits the amplitude of the input IF signal to a predetermined amplitude level, and then outputs the signal to the FM demodulator 8. The FM demodulator 8 FM demodulates the input IF signal, extracts the low frequency signal of the modulated wave, and outputs it to the speaker 13 via the low pass filter (LPF) 9, the squelch switch 11, and the AF amplifier 12. To do. The signal output from the FM demodulator 8 and having a frequency higher than the above low frequency signal including triangular noise is detected by the detection circuit 17 via the high pass filter (HPF) 14, the squelch adjustment attenuator 15, and the noise amplifier 16. Is entered in. The detection circuit 17 detects the noise component output from the FM demodulator 8 and outputs it to the waveform shaping circuit 18.

【0026】

The waveform shaping circuit 18 cannot detect the signal of the modulated wave to be received when the noise component is equal to or higher than the threshold level by comparing the input noise component with a predetermined threshold level. H level SD (signal) The detection) signal is output to the control terminal of the squelch switch 11 as a squelch signal (hereinafter referred to as SQ signal) via the first input terminal of the orgate OR1 to turn off the squelch switch 11, whereby after FM demodulation. It prevents the low frequency signal of the above from being output from the speaker 13. The SD signal output from the waveform shaping circuit 18 is also input to the MPU30. On the other hand, when the noise component is less than the threshold level, the waveform shaping circuit 18 determines that the noise component is sufficiently low and transmits the L level SD signal via the first input terminal of the orgate OR1 to the squelch switch 11. The squelch switch 11 is turned on by outputting to the control terminal of the above, whereby the low frequency signal after FM demodulation is output from the speaker 13. Further, the MPU30 transmits an H-level forced squelch signal (hereinafter referred to as an ESQ signal) for forcibly turning off the squelch switch 11 via the second input terminal of the orgate OR1 as described later. Output to the control terminal of.

【0027】

In the flowchart, the H-level ESQ signal is indicated by the control data 1 in the MPU30, and the L-level ESQ signal is indicated by the control data 0 in the MPU30. The same applies to the H level SD signal.

【0028】

On the other hand, in the transmission state, the audio signal input to the microphone 21 is input to the FM modulator 23 via the AF amplifier 22, and then the FM modulator 23 has a predetermined intermediate frequency f._IFThe carrier signal of the IF signal having is FM-modulated with the input audio signal, the FM-modulated IF signal is output to the mixer 24, and the mixer 24 mixes the input IF signal and the local oscillation signal. And frequency f_RA high-frequency transmission signal equal to is generated and output to the antenna 1 via the power amplifier 25, the contact b of the transmission / reception changeover switch 10 and the common terminal c, and radiates the transmission signal.

【0029】

The MPU30 is a control circuit for controlling the overall operation of the wireless transmitter / receiver and the display operation of the LCD60, and stores a CPU that performs control and calculation, a control program, and data necessary for executing the control program. It includes a ROM and a RAM that is used as a work area when executing the control program and stores the current data of various signals and flags. Further, the rotary encoder 31 for setting the transmission / reception frequency and the memory channel number by rotating the knob and the transmission / reception frequency and the memory channel number are directly input to the MPU30, and the standby process (step S246) described later is performed. The ten-key 32 for setting various controls such as the standby time Tw seconds in is connected. Here, the transmission / reception frequency set by the rotary encoder 31 or the numeric keypad 32 is set as the set frequency data fset and stored in the RAM in the MPU 30. In addition, the standby time Tw seconds is also set by the numeric keypad 32 and then stored in the RAM in the MPU 30 in the same manner.

【0030】

Further, the MPU30 has a step frequency setting key 33 that selectively sets the step frequency Δf, which is the frequency of the change step of the transmission / reception frequency in the VFO mode, among, for example, 1kHz, 5kHz, 10kHz, 20kHz, and 25kHz. It is connected and the data of the step frequency Δf set by the key 33 is input to the MPU30. Further, the other end of the frequency change unit changeover switch 34 whose one end is connected to the ground is connected to the MPU30, and each time the switch 34 is turned on, the unit for changing the transmission / reception frequency using the rotary encoder 31 is the step frequency. It is selectively changed and set between the step frequency Δf selected by the selection key 33 and 1 MHz.

【0031】

Furthermore, the MPU30 is connected to ground via the following five switches. (a) PTT (Push To Talk) switch SW1: This is a switch for transmitting an audio signal by setting the wireless transceiver in the transmitting state, and is in the transmitting state when it is turned on. (b) VFO mode / memory channel mode switch SW2: A switch that selectively switches between VFO mode and memory channel mode, and each time it is turned on, the VFO mode and memory channel mode are switched alternately. (c) Normal mode / search mode switch SW3: A switch that selectively switches between normal mode and search mode, and each time it is turned on, the normal mode and search mode are switched alternately. (d) Receivable mode / non-receivable mode switch SW4: A switch that is valid only in the search mode and selectively switches between the receivable mode and the non-receivable mode. Possible mode and non-receivable mode alternate. (e) Normal mode / scan search mode switch SW5: A switch that selectively switches between normal mode and scan search mode, and each time it is turned on, the normal mode and scan search mode are switched alternately.

【0032】

FIG. 3 is a front view when all the liquid crystal pixels are displayed on the LCD 60. As shown in FIG. 3, in the upper center of the LCD60, a matrix liquid crystal display in which each liquid crystal pixel LM00-LM63 (see FIG. 4) is arranged in a matrix shape of 4 rows and 7 columns, each of which is a rectangular liquid crystal pixel. A unit 61 is provided, and in the vicinity of each liquid crystal pixel LM00-LM60 in the lowermost row of the matrix liquid crystal display unit 61, each has a horizontal line shape and a display position when displaying signal levels of a plurality of frequencies. A reference indicating liquid crystal pixel 62 that constantly indicates a reference level is provided. On the other hand, a center indicating liquid crystal display unit 63a having a downward arrow shape is provided near the upper side of the liquid crystal pixel LM33 in the upper center of the matrix liquid crystal display unit 61. Further, a center indicating liquid crystal display unit 63b having a downward arrow shape is provided near the upper side of the liquid crystal pixel LM63 on the upper right end of the matrix liquid crystal display unit 61, and the liquid crystal pixel on the upper left end of the matrix liquid crystal display unit 61. A center-indicating liquid crystal display 63c having the shape of a downward arrow is provided near the upper side of the LM63. Further, on the left side of the matrix liquid crystal display unit 61, "in the normal mode, the level indicated by the matrix liquid crystal display unit 61 is the reception signal level (in the reception state) or the transmission signal level (in the transmission state). The "S / RF" liquid crystal display unit 64 is formed, and the "M" liquid crystal display unit 65 indicating that the memory channel mode is set is formed directly below the liquid crystal display unit 64, and three digits indicating the memory channel in the memory channel mode are directly below the liquid crystal display unit 64. The 7-segment liquid crystal display unit 66 is formed. Furthermore, at the lower right of LCD60, the transmission / reception frequency f_RA 5-digit 7-segment liquid crystal display unit 67 indicating (center transmission / reception frequency in scan mode) is formed, and the liquid crystal display unit 67 has a decimal point below between the second and third digits.

【0033】

The VRAM 40 is a video RAM that is connected to the MPU 30 and stores 28 pixel data to be displayed on the matrix liquid crystal display 61, and the output terminal of the VRAM 40 is connected to the matrix display 61 of the LCD 60 via the LCD driver 50. To. Therefore, when the pixel data is stored in the VRAM 40, the LCD driver 50 displays the liquid crystal on the matrix liquid crystal display 61 in real time accordingly. FIG. 4 is a front view showing the relationship between the liquid crystal pixels of the matrix liquid crystal display unit 61 of the LCD of FIG. 3 and the address of the VRAM 40 that stores the pixel data. As shown in FIG. 4, each of the 28 liquid crystal pixels LM00-LM63 is assigned an address of "00"-"63" in a two-digit display.

【0034】

The register 41 is a 2-bit register that is connected to the MPU30 and stores 2-bit pixel data Dsm for display on the liquid crystal displays 64 and 65, and the output terminal of the register 41 is the LCD60 via the LCD driver 51. It is connected to the liquid crystal display units 64 and 65 of. Therefore, when the pixel data Dsm is stored in the register 41, the LCD driver 51 displays the liquid crystal on the liquid crystal displays 64 and 65 accordingly. Here, the first bit of the pixel data Dsm is data indicating whether or not to display the liquid crystal display unit 64, and the second bit of the pixel data Dsm is data indicating whether or not to display the liquid crystal display unit 65. is there.

【0035】

The register 42 is a register connected to the MPU 30 and stores the memory channel number data Dm for display on the liquid crystal display 66, and the output terminal of the register 42 is connected to the liquid crystal display 66 of the LCD 60 via the LCD driver 52. Be connected. Therefore, when the pixel data Dm is stored in the register 42, the LCD driver 52 displays the liquid crystal on the liquid crystal display unit 66 accordingly. Further, the register 43 is connected to the MPU30, and the transmission / reception frequency data Df for displaying on the liquid crystal display unit 67 is displayed._CLThe output terminal of the register 43 is connected to the liquid crystal display unit 67 of the LCD 60 via the LCD driver 52. Therefore, the pixel data Df is stored in the register 43._CLIs stored, the LCD driver 53 displays the liquid crystal on the liquid crystal display unit 67 accordingly.

【0036】

The register 44 is a 2-bit register that is connected to the MPU30 and stores 2-bit pixel data Dcm for displaying the center instruction liquid crystal display units 63a, 63b, 63c, and the output terminal of the register 44 is an LCD driver. It is connected to the liquid crystal display units 63a, 63b, 63c of the LCD 60 via 54. Therefore, when the pixel data Dcm is stored in the register 44, the liquid crystal display unit 63a, 63b, 63c is displayed on the liquid crystal display by the LCD driver 54 accordingly. Here, when the pixel data Dcm is "00", only the liquid crystal display unit 63a which indicates the central portion of the matrix liquid crystal display unit 61 is displayed, and when the pixel data Dcm is "01", the right end of the matrix liquid crystal display unit 61 is indicated. Only the liquid crystal display unit 63b is displayed, and when the pixel data Dcm is "10", only the liquid crystal display unit 63c indicating the left end of the matrix liquid crystal display unit 61 is displayed.

【0037】

The various flags stored in the RAM in the MPU30 are as follows. (a) FS2: FS2 = 0 in VFO mode and FS2 = 1 in memory channel mode. (b) FS3: FS3 = 0 in normal mode and FS3 = 1 in search mode. (c) FS4: FS4 = 0 in the receivable mode and FS4 = 1 in the non-receivable mode. (d) FS5: FS5 = 0 in normal mode and FS5 = 1 in scan search mode. (e) FS5S: A flag indicating the start of scan search, which is set to 1 when the scan search mode is started, and reset to 0 in step S407 after all the matrix liquid crystal display units 61 are turned off in step S406. Will be done. (f) FUP: Set to 1 when the rotary encoder 31 is rotated clockwise to automatically or manually scan the transmit and receive frequencies, while automatically or manually scan the transmit and receive frequencies downwards. It is reset to 0 when the rotary encoder 31 is rotated counterclockwise to scan the frequency.

【0038】

FIG. 9 is a flowchart of the main routine executed by the CPU of the wireless transceiver of FIG.

【0039】

As shown in FIG. 9, in step S1, the initialization process is first performed. That is, the L level TRSW signal is output and the reception state is set, and (433MHz-f._IF) Is the local oscillation frequency data Df_LIs set as. In addition, each flag FS2, FS3, FS4, FS5, FS5S is reset to 0 and the flag FUP is set to 1, and the L level ESQ signal is output, and "10" is set in the pixel data Dsm and stored. Will be done. Then, after the key input process (see FIGS. 10 and 11) is executed in step S2, it is determined in step S3 whether or not the flag FS2 is 1. If FS2 = 1, memory channel mode processing is executed in step S4, and then the process returns to step S2. On the other hand, when FS2 = 0, VFO mode processing (see FIG. 12) is executed in step S5, and then the process returns to step S2.

【0040】

10 and 11 are flowcharts of the subroutine of the key input process (step S2) of FIG. 9, and the key input process includes (a) setting process of flag FS2 from step S21 to step S24 and (b) step. Flag FS3 setting process from S31 to step S34, (c) Flag FS5 setting process from step S61 to step S65, and (d) Flag FS4 from step S40 to step S46 (excluding step S45) It consists of (e) frequency data setting processing in step S45, (f) setting processing related to the rotary encoder 31 from step S51 to step S54, and (g) other key input processing in step S55. Will be done.

【0041】

As shown in FIG. 10, it is determined in step S21 whether or not the switch SW2 is turned on, and if it is not turned on, the process proceeds to step S31, while when it is turned on, whether or not the flag FS2 is 1 in step S22. Is judged. Here, when the flag FS2 = 1, the flag FS2 is reset to 0 in step S23 and then the process proceeds to step S31, while when the flag FS2 = 0, the flag FS2 is set to 1 in step S24 and then the process proceeds to step S31.

【0042】

Next, it is determined in step S31 whether or not the switch SW3 is turned on, and if it is not turned on, the process proceeds to step S61, while when it is turned on, it is determined whether or not the flag FS3 is 1 in step S32. Here, when the flag FS3 = 1, the flag FS3 is reset to 0 in step S33 and then the process proceeds to step S61, while when the flag FS3 = 0, the flag FS3 is set to 1 in step S34 and then the process proceeds to step S61.

【0043】

Next, it is determined in step S61 whether or not the switch SW5 is turned on, and if it is not turned on, the process proceeds to step S40 in FIG. 11, while when it is turned on, it is determined whether or not the flag FS5 is 1 in step S62. Will be done. Here, when the flag FS5 = 1, the flag FS5 is reset to 0 in step S63, and then the process proceeds to step S40 in FIG. On the other hand, when the flag FS5 = 0 in step S62, the flags FS5 and FS5S are both set to 1 in steps S64 and S65, respectively, and then the process proceeds to step S40 in FIG.

【0044】

Then, in step S40, it is determined whether or not the flag FS3 is 1, and in step S46, it is determined whether or not the flag FS5 is 1. That is, these judgments are made in order to enable the processing of steps S41 to S44 only in the search mode or the scan search mode. Therefore, when FS3 = 1 or FS5 = 1, the process proceeds to step S41, while when FS3 = 0 and FS5 = 0, the process proceeds to step S45. Further, it is determined in step S41 whether or not the switch SW4 is turned on, and if it is not turned on, the process proceeds to step S45, while when it is turned on, it is determined whether or not the flag FS4 is 1 in step S42. Here, when the flag FS4 = 1, the flag FS4 is reset to 0 in step S43 and then the process proceeds to step S45, while when the flag FS4 = 0, the flag FS4 is set to 1 in step S44 and then the process proceeds to step S45.

【0045】

Next, in step S45, the set frequency data fset set by using the rotary encoder 31 or the numeric keypad 32 is the transmission / reception frequency data Df._CLSet as frequency data (Df)_CL-f_IF) Is the local oscillation frequency data Df_LIs set as, and the local oscillation frequency data Df_LIs the central local oscillation frequency data Df_LOIs set as.

【0046】

Next, in step S51, it is determined whether or not the rotary encoder 31 is rotated clockwise, and if it is rotated clockwise, both the flags FUP and FS5S are set to 1 in step S52, and the process proceeds to step S53. On the other hand, if NO in step S51, the process directly proceeds to step S53. Next, in step S53, it is determined whether or not the rotary encoder 31 is rotated counterclockwise, and if it is rotated counterclockwise, the flag FUP is reset to 0 and the flag FS5S is set to 1 in step S54, and step S55. Proceed to. On the other hand, if NO in step S53, the process directly proceeds to step S55. Further, in step S55, input processing for other keys such as the setting of the standby time Tw seconds using the numeric keypad 32, the setting using the step frequency selection key 33, and the setting using the frequency change unit selector switch 34 is executed. To.

【0047】

FIG. 12 is a flowchart of the subroutine of the VFO mode processing (step S5) of FIG.

【0048】

As shown in FIG. 12, it is determined in step S11 whether or not the flag FS3 is 1, and in step S90 it is determined whether or not the flag FS5 is 1. When FS3 = 0 and FS5 = 0, it is not the search mode and it is not the scan search mode, so it proceeds to step S96, while when FS3 = 1, it is the search mode, so it proceeds to step S91, and when FS5 = 1. Since it is in the scan search mode, the process proceeds to step S94. In step S96, the data "10" is stored in the pixel data Dsm to display the liquid crystal pixels of the "S / RF" liquid crystal display unit 64 on the LCD60, and "00" is stored in the pixel data Dcm to indicate the center to the LCD60. The liquid crystal pixels of the liquid crystal display unit 63a are displayed, and then the normal process (see FIG. 13) is executed in step S13, and then the data returns.

【0049】

In step S91, the data "00" is stored in the pixel data Dsm and the liquid crystal display unit 64 or 65 is not displayed, and the pixel data Dcm is stored in "00" and the liquid crystal display unit 63a for center instruction is stored in the LCD 60. The liquid crystal pixels are displayed, and the process proceeds to step S92. Next, in step S92, it is determined whether or not the flag FS4 is 1, and when FS4 = 0, the search receivable process (see FIGS. 14 to 16) is executed in step S14, and then the process proceeds to step S93. .. On the other hand, when FS4 = 1, the search reception impossible process is executed in step S15, and then the process proceeds to step S93. In step S93, the display change process (see FIG. 17), which is the process of the manual scan search, is executed, and the process returns.

【0050】

In step S94, the data 00 is stored in the pixel data Dsm and the liquid crystal display units 64 and 65 are not displayed on the liquid crystal display, and the process proceeds to step S95. Next, in step S95, it is determined whether or not the flag FS4 is 1, and when FS4 = 0, the scan search receivable process (see FIGS. 14 to 16) is executed in step S17, and then returns. On the other hand, when FS4 = 1, it returns after executing the scan search unreceivable process in step S16. [0051]

FIG. 13 is a flowchart of the subroutine of the normal processing (step S13) of FIG. As shown in FIG. 13, first, it is determined in step S101 whether or not the PTT switch SW1 is turned on, and when it is turned on, the process proceeds to step S102 to output an H level TRSW signal and press the transmission / reception switch 10. After switching to the contact b side and putting it in the transmission state, it returns. On the other hand, when the PTT switch SW1 is not turned on (NO in step S101), the L level TRSW signal is output in step S103, the transmission / reception changeover switch 10 is switched to the contact a side to enter the reception state, and then step S104. The received signal level data SLD output from the A / D converter 20 is detected and captured in step S105, the data SLD is converted to 7 level data in step S105, and the converted data is converted to address 00 of VRAM40 in step S106. , 01,10,11, ..., 60,61, and 14 liquid crystal pixels for the lowermost two lines of the matrix display 61 of the LCD60 LM00, LM01, LM10, LM11, Using LM20, LM21, LM30, LM31, LM40, LM41, LM50, LM51, LM60, LM61, the left end is set to 0/7 level and two lines are displayed at the same time, and the signal level is displayed in the horizontal direction and returned.

【0052】

For example, when the signal level is 4/7, as shown in FIG. 6, the liquid crystal pixels LM00, LM01, LM10, LM11, LM20, LM21, LM30, LM31 are displayed, and when the signal level is 7/7, all. Liquid crystal pixels for two lines LM00, LM01, LM10, LM11, LM20, LM21, LM30, LM31, LM40, LM41, LM50, LM51, LM60, LM61 are displayed, and when the signal level is 1/7, the liquid crystal pixels LM00 and LM01 are displayed.

【0053】

Although detailed description is omitted, in the normal processing and other processing, the output level of the power amplifier 25 is detected in the transmission state, and the lowermost side of the matrix display unit 61 of the LCD 60 is the same as in the reception state. 14 liquid crystal pixels for 2 lines LM00, LM01, LM10, LM11, LM20, LM21, LM30, LM31, LM40, LM41, LM50, LM51, LM60, LM61 are used, and the left end is set to 0 level and 2 lines are set. It is displayed at the same time and the transmission signal level is displayed in the horizontal direction.

【0054】

14 to 16 are flowcharts of the subroutine of the search receivable processing of FIG.

【0055】

As shown in FIG. 14, first, it is determined in step S201 whether or not the PTT switch SW1 is turned on, and when it is turned on, the process proceeds to step S202 to output an H-level TRSW signal to switch the transmission / reception switch 10. After switching to the contact b side and putting it in the transmission state, it returns. On the other hand, when the PTT switch SW1 is not turned on (NO in step S201), the L level TRSW signal is output in step S203, the transmission / reception changeover switch 10 is switched to the contact a side to enter the reception state, and then step S204. In, the H level ESQ signal is output, the squelch switch 11 is turned off, and the output of the low frequency signal to the speaker 13 is stopped.

【0056】

Then, in step S211 the frequency data (Df)_LO-3Δf) is the local oscillation frequency data Df_LThe received signal level data SLD output from the A / D converter 20 is detected and captured in step S212, the data SLD is converted to 4-level data in step S213, and then the data is converted in step S214. Data is stored and updated at address 00-03 of VRAM40, and the lower end is set to 0 using four liquid crystal pixels LM00-LM03 for one row of the matrix display 61 of LCD60, for example, as shown in FIG. / 4 Displays the signal level in the vertical direction as the level. Here, for example, when the signal level is 4/4, all four liquid crystal pixels LM00-LM03 are displayed on the liquid crystal, and when the signal level is 2/4, the two liquid crystal pixels LM00-LM01 are displayed on the liquid crystal.

【0057】

Then, in step S221, the frequency data (Df)_LO-2Δf) is the local oscillation frequency data Df_LThe received signal level data SLD output from the A / D converter 20 is detected and captured in step S222, the data SLD is converted to 4-level data in step S223, and then the conversion is performed in step S224. Data is stored and updated at address 10-13 of VRAM40, and signals are displayed in the vertical direction with the lower end as 0/4 level using four liquid crystal pixels LM10-LM13 for one row of matrix display 61 of LCD60. Display the level.

【0058】

Then, in step S231, the frequency data (Df)_LO-Δf) is the local oscillation frequency data Df_LThe received signal level data SLD output from the A / D converter 20 is detected and captured in step S232, the data SLD is converted to 4-level data in step S233, and then converted in step S234. Data is stored and updated at address 20-23 of VRAM40, and signals are displayed in the vertical direction with the lower end as 0/4 level using four liquid crystal pixels LM20-LM23 for one row of matrix display 61 of LCD60. Display the level and proceed to step S240 in FIG.

【0059】

As shown in FIG. 15, in step S240, the L level ESQ signal is output, the squelch switch 11 is turned off, the speaker 13 is used to make the low frequency signal of the modulated wave of the received signal available, and the signal is on standby. Reset the timekeeping time Twp of the timekeeping timer (not shown) in the MPU30 for processing to 0 seconds and start the timekeeping. Then, in step S241, the central local oscillation frequency data Df_LOThe local oscillation frequency data Df_LAfter setting to, proceed to step S242. In step S242, the received signal level data SLD output from the A / D converter 20 is detected and captured, the data SLD is converted into 4-level data in step S243, and then the converted data is used in step S244. Stored and updated at addresses 30-33 of VRAM40, using four liquid crystal pixels LM30-LM33 for one row in the center of the matrix display 61 of LCD60, in the vertical direction with the lower end as 0/4 level. The signal level is displayed and it is determined in step S245 whether or not the SD signal is at H level. When the SD signal is at H level, that is, when there is no received signal at the reception frequency, the process proceeds to step S250 of FIG. 16 without executing the standby time determination process of step S246. On the other hand, when the SD signal is at the L level in step S245, that is, when there is a received signal at the reception frequency, the standby time for standby processing is determined in step S246. That is, it is determined whether or not the time Twp of the time timer has elapsed the preset standby time Tw. If it has not elapsed, the process returns from step S242 and the level detection display process of the reception frequency is executed while executing the standby process. On the other hand, if it has passed, the process proceeds to step S250 in FIG. The signal level displayed in step S244 above indicates the signal level of the signal currently being received. In the loop process of returning from step S246 to step S246 via step S242, the squelch switch 11 is on while detecting and displaying the signal level of the received signal in real time at a predetermined cycle. Therefore, the set transmission / reception frequency f_R= fset = Df_CLThe low-frequency signal of the modulated wave can be heard by the speaker 13 by receiving the received signal of. The present invention is not limited to this, and the determination of the waiting time may not be executed in step S246, and the waiting time may be set to wait for, for example, Tw seconds. In this case, the signal level currently being received does not change in real time.

【0060】

As shown in FIG. 16, in step S250, the H level ESQ signal is output, the squelch switch 11 is turned off, and the output of the low frequency signal to the speaker 13 is stopped. Then, in step S251, the frequency data (Df)_LO+ Δf) is the local oscillation frequency data Df_LThe received signal level data SLD output from the A / D converter 20 is detected and captured in step S252, the data SLD is converted to 4-level data in step S253, and then the conversion is performed in step S254. Data is stored and updated at addresses 40-43 of VRAM40, and signals are displayed in the vertical direction with the lower end as 0/4 level using four liquid crystal pixels LM40-LM43 for one row of matrix display 61 of LCD60. Display the level.

【0061】

Then, in step S261, the frequency data (Df)_LO+ 2Δf) is the local oscillation frequency data Df_LThe received signal level data SLD output from the A / D converter 20 is detected and captured in step S262, the data SLD is converted to 4-level data in step S263, and then the conversion is performed in step S264. Data is stored and updated at addresses 50-53 of VRAM40, and signals are displayed in the vertical direction with the lower end as 0/4 level using four liquid crystal pixels LM50-LM53 for one row of matrix display 61 of LCD60. Display the level.

【0062】

Then, in step S271, the frequency data (Df)_LO+ 3Δf) is the local oscillation frequency data Df_LThe received signal level data SLD output from the A / D converter 20 is detected and captured in step S272, the data SLD is converted to 4-level data in step S273, and then the conversion is performed in step S274. Data is stored and updated at addresses 60-63 of VRAM40, and signals are displayed in the vertical direction with the lower end as 0/4 level using four liquid crystal pixels LM60-LM63 for one row of matrix display 61 of LCD60. Display the level.

【0063】

Note that the search reception impossible process (step S15) of FIG. 12 can receive the search shown in FIGS. 14 to 16 except that the ESQ signal of H level instead of L level is output in step S240 of FIG. This is the same as the process (step S14). As a result, when the search mode is set to the non-receivable mode, the signal levels of a plurality of frequencies are displayed in the same manner as the search receivable process, but the low frequency signal of the received signal cannot be heard using the speaker 13. It is composed of.

【0064】

FIG. 17 is a flowchart of the subroutine of the display change process (step S93) of FIG. 12 for executing the manual scan search.

【0065】

In step S97, the change direction of the rotation of the rotary encoder 31 is determined, and when it is clockwise, the upward display change process (see FIG. 18) is executed in step S98, and then the rotary encoder 31 returns. When turning counterclockwise in step S97 Return after the downward display change process (see FIG. 19) is executed in step S99. Further, when there is no change in rotation in step S97, the process returns as it is.

【0066】

FIG. 18 is a flowchart of the subroutine (step S98) of the upward display change processing of FIG.

【0067】

First, in step S601, the rotation frequency of the rotary encoder 31 is set in the data CNT, and then in step S602, the central local oscillation frequency data Df._LOThe data obtained by adding the step frequency Δf to the central local oscillation frequency data Df_LOUpdate as, and in step S603, transmit / receive frequency data Df_CLTransmission / reception frequency data Df_CLUpdate as. Then, in step S604, the above-mentioned updated transmission / reception frequency data Df_CLIs displayed on the 7-segment liquid crystal display unit 67 of the LCD 60, and then the upward display data replacement process (see FIG. 20) is executed in step S605. In the upward display data replacement process, the pixel data in the VRAM 40 is replaced so that the display position of the signal level of the received signal of a plurality of frequencies on the matrix display unit 61 of the LCD 60 is shifted to the left by one step.

【0068】

Next, in step S606, the local oscillation frequency data Df_LData (Df_LO+ 3Δf) is stored and updated and set. Further, in step S607, the received signal level data SLD output from the A / D converter 20 is detected and captured, the data SLD is converted into 4-level data in step S608, and then the conversion is performed in step S609. Data is stored and updated at addresses 60-63 of VRAM40, and four liquid crystal pixels LM60-LM63 for one row at the right end of the matrix display 61 of LCD60 are used, and the lower end is set to 0/4 level in the vertical direction. Displays the signal level with, and thereby detects and displays the signal level at the right end where the frequencies do not correspond due to the data replacement in step S605. Then, after updating by reducing the data CNT by 1 in step S610, it is determined in step S611 whether or not the data CNT is 0, and when CNT = 0, the rotary encoder 31 is rotated to perform the specified shift. It returns as if the display position of the matrix liquid crystal display unit 61 is shifted by the number of steps to be performed. On the other hand, in step S611, if CNT 0, the process returns to step S602 and the process is repeated.

【0069】

By the above processing, the display position of the signal level of the received signal of a plurality of frequencies displayed on the matrix liquid crystal display unit 61 of the LCD 60 is shifted upward by the number of steps manually set by using the rotary encoder 31. Can be made to. For example, as shown in FIG. 26, when the transmission / reception frequency is f11 (time t1) and the rotary encoder 31 is rotated clockwise by 3 steps, the rotary encoder 31 changes sequentially from t1 through t2 and t3 to t4. It becomes a state. In FIG. 26, the frequency of each signal level in the matrix liquid crystal display unit 61 that changes by the rotation operation of the rotary encoder 31 and the transmission / reception frequency data Df displayed on the liquid crystal display unit 67._CLF11 is the transmission / reception frequency at the start of the scan search, and the larger the number assigned to "f", the higher the frequency.

【0070】

FIG. 19 is a flowchart of the subroutine (step S99) of the downward display change processing of FIG.

【0071】

First, in step S621, the rotation frequency of the rotary encoder 31 is set in the data CNT, and then in step S622, the central local oscillation frequency data Df._LOThe data obtained by subtracting the step frequency Δf from the central oscillation frequency data Df_LOUpdate as, and in step S623, transmit / receive frequency data Df_CLThe data obtained by subtracting the step frequency Δf from is transmitted / received frequency data Df._CLUpdate as. Then, in step S624, the above-mentioned updated transmission / reception frequency data Df_CLIs displayed on the 7-segment liquid crystal display unit 67 of the LCD 60, and then the downward display data replacement process (see FIG. 21) is executed in step S625. In the downward display data replacement process, the pixel data in the VRAM 40 is replaced so that the signal level display position of the received signal of a plurality of frequencies on the matrix display unit 61 of the LCD 60 is shifted to the right by only one step.

【0072】

Then, in step S626, the local oscillation frequency data Df_LData (Df_LO-3Δf) is stored and updated for setting. Further, in step S627, the received signal level data SLD output from the A / D converter 20 is detected and captured, the data SLD is converted into 4-level data in step S628, and then the conversion is performed in step S629. Data is stored and updated at address 00-03 of VRAM40, and four liquid crystal pixels LM00-LM03 for one row on the left end of the matrix display 61 of LCD60 are used, and the lower end is set to 0/4 level in the vertical direction. Displays the signal level with, and thereby detects and displays the signal level at the left end where the frequencies do not correspond due to the data replacement in step S625. Then, after updating by reducing the data CNT by 1 in step S630, it is determined in step S631 whether or not the data CNT is 0, and when CNT = 0, the rotary encoder 31 is rotated to perform the specified shift. It returns as if the display position of the matrix liquid crystal display unit 61 is shifted by the number of steps to be performed. On the other hand, in step S631, if CNT 0, the process returns to step S622 and the process is repeated.

【0073】

By the above processing, the display position of the signal level of the received signal of a plurality of frequencies displayed on the matrix liquid crystal display unit 61 of the LCD 60 is shifted downward by the number of steps manually set by using the rotary encoder 31. Can be made to. For example, as shown in FIG. 26, when the transmission / reception frequency is f14 (time t4) and the rotary encoder 31 is rotated counterclockwise by 3 steps, it changes sequentially from t4 via t3 and t2 to t1. It becomes a state.

【0074】

FIG. 20 is a flowchart of the subroutine of the upward display data replacement process (steps S605 and S501) of FIGS. 18 and 23.

【0075】

First, in step S321, the pixel data stored at the address 10-13 of the VRAM 40 is stored and updated at the address 00-03, and the corresponding signal level is set in the vertical direction to the liquid crystal pixel LM00 of the matrix liquid crystal display unit 61 of the LCD 60. Display on -03. Next, in step S322, the pixel data stored at the address 20-23 of the VRAM 40 is stored and updated at the address 10-13, and the corresponding signal level is vertically adjusted to the liquid crystal pixel LM10 of the matrix liquid crystal display unit 61 of the LCD 60. Display at -13. Further, in steps S323 to S326, the same processing is repeated, and the pixel data stored in the addresses 30-33,40-43,50-53,60-63 of the VRAM40 are stored at the addresses 20-23,30, respectively. Stored and updated in -33,40-43,50-53, and set the corresponding signal levels in the vertical direction to the liquid crystal pixels LM20-23, LM30-33, LM40-43, LM50- of the matrix liquid crystal display 61 of the LCD60. Display on 53 and return. By the above processing, the display position of the signal level of the received signals of a plurality of frequencies displayed on the matrix liquid crystal display unit 61 of the LCD 60 is shifted to the left by one step.

【0076】

FIG. 21 is a flowchart of the subroutine of the downward display data replacement process (steps S625 and S511) of FIGS. 19 and 24.

【0077】

First, in step S331, the pixel data stored in the addresses 50-53 of the VRAM 40 is stored and updated in the addresses 60-63, and the corresponding signal level is set in the vertical direction in the liquid crystal pixel LM60 of the matrix liquid crystal display unit 61 of the LCD 60. Display at -63. Next, in step S332, the pixel data stored in the addresses 40-43 of the VRAM 40 is stored and updated at the addresses 50-53, and the corresponding signal level is set in the vertical direction in the liquid crystal pixel LM50 of the matrix liquid crystal display unit 61 of the LCD 60. Display at -53. Further, in steps S333 to S336, the same processing is repeated, and the pixel data stored at the addresses 30-33,20-23,10-13,00-03 of the VRAM 40 are stored at the addresses 40-43,30, respectively. -33,20-23,10-13 stores and updates, and the corresponding signal levels are set in the vertical direction by the liquid crystal pixels LM40-43, LM30-33, LM20-23, LM10- of the matrix liquid crystal display 61 of the LCD60. Display on 13 and return. By the above processing, the display position of the signal level of the received signals of a plurality of frequencies displayed on the matrix liquid crystal display unit 61 of the LCD 60 is shifted to the right by one step.

【0078】

FIG. 22 is a flowchart of the subroutine of the scan search receivable processing of FIG.

【0079】

As shown in FIG. 22, first, it is determined in step S401 whether or not the PTT switch SW1 is turned on, and when it is turned on, the process proceeds to step S402 to output an H level TRSW signal and press the transmission / reception switch 10. After switching to the contact b side and putting it in the transmission state, it returns. On the other hand, when the PTT switch SW1 is not turned on (NO in step S401), the L level TRSW signal is output in step S403, the transmission / reception changeover switch 10 is switched to the contact a side to enter the reception state, and then step S404. In, the L level ESQ signal is output, the squelch switch 11 is turned off, and the low frequency signal is output to the speaker 13. Next, in step S405, it is determined whether or not the flag FS5S = 1, and when FS5S = 1, all the liquid crystal pixels of the matrix liquid crystal display unit 61 are turned off by clearing the addresses 00-63 of VRAM40 in step S406. , After resetting the flag FS5S to 0 in step S407, the process proceeds to step S408. On the other hand, when FS5S = 0 in step S405, the process directly proceeds to step S408.

【0080】

Next, in step S408, it is determined whether or not the flag FUP = 1, and when FUP = 1, "01" is stored in the pixel data Dcm in step S409, and the liquid crystal pixel of the center instruction liquid crystal display unit 63b is stored in the LCD 60. Is displayed on the liquid crystal display, and the scan search upward processing (see FIG. 23) is executed in step S410 to return. On the other hand, when FUP = 0 in step S408, "10" is stored in the pixel data Dcm in step S411, the liquid crystal pixel of the center indicating liquid crystal display unit 63c is displayed on the LCD60, and the scan search downward processing is performed in step S412. (See Figure 24) and return.

【0081】

The scan search unreceivable process (step S16) of FIG. 12 is the scan search receivable process shown in FIG. 22, except that the ESQ signal of the H level instead of the L level is output in step S404 of FIG. This is the same as (step S17). As a result, when the scan search mode is in the non-receivable mode, the signal levels of a plurality of frequencies are displayed in the same manner as in the scan search receivable processing, but the low frequency signal of the received signal can be heard using the speaker 13. It is configured so that it cannot be done.

【0082】

FIG. 23 is a flowchart of the subroutine of the scan search upward processing (step S410) of FIG. 22.

【0083】

First, after executing the upward display data replacement process (see FIG. 20) in step S501, the L level ESQ signal is output in step S502, the squelch switch 11 is turned off, and the received signal is received using the speaker 13. The low frequency signal of the modulated wave can be received, and the time Twp of the time timer in the MPU30 for standby processing is reset to 0 seconds to start the time measurement. Then, in step S503, the transmission / reception frequency data Df_CLIs displayed on the liquid crystal display unit 67 by setting the register 43, and the central local oscillation frequency data Df is displayed in step S504._LOThe local oscillation frequency data Df_LSet to and proceed to step S505.

【0084】

In step S505, the received signal level data SLD output from the A / D converter 20 is detected and captured, the data SLD is converted into 4-level data in step S506, and then the converted data is used in step S507. Stored and updated at addresses 60-63 of VRAM40, using four liquid crystal pixels LM60-LM63 for one row at the right end of the matrix display 61 of LCD60, signals in the vertical direction with the lower end set to 0/4 level. The level is displayed and it is determined in step S508 whether the SD signal is at H level. When the SD signal is at H level, that is, when there is no signal at the reception frequency, the process proceeds to step S510 without executing the standby time determination process in step S509. On the other hand, when the SD signal is at the L level in step S508, that is, when there is a signal at the reception frequency, the standby time for standby processing is determined in step S509. That is, it is determined whether or not the time Twp of the time timer has elapsed the preset standby time Tw. If it has not elapsed, the process returns to step S505 to execute the level detection display process of the reception frequency while executing the standby process. On the other hand, if it has passed, the process proceeds to step S510. Then, in step S510, the frequency data (Df)_LO+ Δf) is the central local oscillation frequency data Df_LOAnd frequency data (Df)_CL+ Δf) Send / receive frequency data Df_CLReturn after setting as.

【0085】

The signal level displayed in step S507 of FIG. 23 indicates the signal level of the signal currently being received. In the loop process of returning from step S505 to step S505 via step S509, the squelch switch 11 is on while detecting and displaying the signal level of the received signal in real time at a predetermined cycle. Therefore, the set transmission / reception frequency f_R= fset = Df_CLThe low-frequency signal of the modulated wave can be heard by the speaker 13 by receiving the received signal of. The present invention is not limited to this, and the determination of the waiting time may not be executed in step S509, and the waiting time may be set to wait for, for example, Tw seconds. In this case, the signal level currently being received does not change in real time.

【0086】

FIG. 24 is a flowchart of the subroutine of the scan search downward processing (step S412) of FIG. 22.

【0087】

First, after executing the downward display data replacement process (see FIG. 21) in step S511, the L-level ESQ signal is output in step S512, the squelch switch 11 is turned off, and the received signal is received using the speaker 13. The low frequency signal of the modulated wave can be received, and the time Twp of the time timer in the MPU30 for standby processing is reset to 0 seconds to start the time measurement. Then, in step S513, the central local oscillation frequency data Df_LOThe local oscillation frequency data Df_LSet to, and in step S514, the transmission / reception frequency data Df_CLIs set in the register 43 to be displayed on the liquid crystal display unit 67, and the process proceeds to step S515.

【0088】

In step S515, the received signal level data SLD output from the A / D converter 20 is detected and captured, the data SLD is converted into 4-level data in step S516, and then the converted data is used in step S517. Stored and updated at address 00-03 of VRAM40, using four liquid crystal pixels LM00-LM03 for one row on the left end of the matrix display 61 of LCD60, the signal is displayed in the vertical direction with the lower end as 0/4 level. The level is displayed and it is determined in step S518 whether or not the SD signal is H level. When the SD signal is at H level, that is, when there is no signal at the reception frequency, the process proceeds to step S520 without executing the standby time determination process in step S519. On the other hand, when the SD signal is at the L level in step S518, that is, when there is a signal at the reception frequency, the standby time for standby processing is determined in step S519. That is, it is determined whether or not the time Twp of the time timer has elapsed the preset standby time Tw. If it has not elapsed, the process returns to step S515 to execute the level detection display process of the reception frequency while executing the standby process. On the other hand, if it has passed, the process proceeds to step S520. Then, in step S520, the frequency data (Df)_LO-Δf) is the central local oscillation frequency data Df_LOAnd frequency data (Df)_CL-Δf) Send / receive frequency data Df_CLReturn after setting as.

【0089】

The signal level displayed in step S517 of FIG. 24 indicates the signal level of the signal currently being received. In the loop process of returning from step S515 to step S515 via step S519, the squelch switch 11 is on while detecting and displaying the signal level of the received signal in real time at a predetermined cycle. Therefore, the set transmission / reception frequency f_R= fset = Df_CLThe low-frequency signal of the modulated wave can be heard by the speaker 13 by receiving the received signal of. The present invention is not limited to this, and the determination of the waiting time may not be executed in step S519, and the waiting time may be set to wait for, for example, Tw seconds. In this case, the signal level currently being received does not change in real time.

【0090】

In the scan search receivable processing described with reference to FIG. 22, the transmission / reception frequency is automatically changed upward or downward for each step frequency set by using the step frequency selection key 33. It repeats until the scan search mode is released, thereby shifting the signal level data of the received signals of multiple frequencies in the VRAM 40, thereby corresponding to the change of the transmission / reception frequency, and the signal levels of the received signals of multiple frequencies. The display position of is sequentially shifted upward or downward of the frequency and displayed. Here, when the transmission / reception frequency is changed upward in this scan search mode, the display of the signal level of the transmission / reception frequency is indicated by the center instruction liquid crystal display unit 63b in FIG. 7, and the matrix liquid crystal display unit 61. After being shifted to be located at the right end of, the transmission / reception frequencies are sequentially scanned upward, so that the corresponding signal level display position is sequentially shifted to the left as shown in FIG. 27. On the other hand, when changing downward, the signal level display of the transmission / reception frequency is shifted so as to be located at the left end of the matrix liquid crystal display unit 61 as instructed by the center instruction liquid crystal display unit 63c in FIG. Since the transmission / reception frequencies are sequentially scanned downward, the display position of the corresponding signal level is sequentially shifted to the right as shown in FIG. 28. In FIGS. 27 and 28, the frequency of each signal level in the matrix liquid crystal display unit 61, which changes with the passage of time t, and the transmission / reception frequency data Df displayed on the liquid crystal display unit 67, as in FIG. 26._CLF11 is the transmission / reception frequency at the start of the scan search, and the larger the number assigned to "f", the higher the frequency.

【0091】

In step S406 in the scan search receivable process of FIG. 22, all the liquid crystal displays of the matrix liquid crystal display unit 61 in the LCD 60 are turned off, but the present invention is not limited to this, and the process of step S406 is not executed and the lights are not turned off. It may be configured as follows. In this case, as shown in FIGS. 29 and 30 corresponding to FIGS. 27 and 28, when the scan search is performed in the upward direction, the transmission / reception frequencies f11 at the start of the scan search and the lower three frequencies f8 = f11-3Δf, Since the signal level data of f9 = f11-2Δf and f10 = f11-Δf is residually stored in VRAM40, it is additionally displayed in comparison with the above embodiment, and when the scan search is started in the downward direction, the scan search is started. Since the signal level data of the three frequencies f12 = f11 + Δf, f13 = f11 + 2Δf, f14 = f11 + 3Δf above the transmission / reception frequency f11 is stored in VRAM40, it is added in comparison with the above embodiment. Is displayed.

【0092】

Fig. 25 focuses on the signal level display processing of multiple frequencies when the SD signal is L level and the reception state is repeated by setting the VFO mode, search mode and search receivable mode with the wireless transceiver of Fig. 1. It is a timing chart at the time of the search reception process (hereinafter referred to as search reception process). As shown in FIG. 25, the search reception process is composed of the following processing groups, and the processing is periodically repeated unless the mode is switched by using the switches SW1 to SW4.

【0093】

(a) T0 second processing 500 including processing of steps S2 and S3 of the main routine. (b) Set transmission / reception frequency f including the processing of steps S211 to S234_R= fset = Df_CLT1 second processing 501 including detection and display processing of signal levels of the three frequencies below (hereinafter referred to as the three frequencies below). Here, the lower three frequencies are frequencies f that differ from each other by the preset step frequency Δf._R-3Δf, frequency f_R-2Δf, frequency f_R-Δf. (c) Transmission / reception frequency f including the processing of steps S240 to S245_R= fset = Df_CLT2 second processing, including detection and display processing of the signal level of 502. (d) Processing including determination of the waiting time of Tw seconds in step 246, and loop processing of returning from step S246 until the waiting time Tw seconds elapses to step S246 via step S242 (not shown in FIG. 25). 503. In the process 503, as described above, the transmission / reception frequency f currently being received_R= fset = Df_CLThe signal level of the received signal of is periodically detected and displayed in real time at a predetermined period, and the operator can hear the low frequency signal of the modulated wave on the speaker 13 while observing the display of the signal level. (e) Set transmission / reception frequency f including the processing of steps S250 to S274_R= fset = Df_CLProcessing for T3 seconds including detection and display processing of signal levels of the three frequencies above (hereinafter referred to as the three frequencies above) 504. Here, the upper three frequencies are frequencies f that differ from each other by the preset step frequency Δf._R+ Δf, frequency f_R+ 2Δf, frequency f_R+ 3Δf.

【0094】

In the search reception process, when the processes 500 to 504 are periodically repeated, when the level detection display process of a certain frequency is performed, the signal levels for the other six frequencies are the immediately preceding level detection display. Since it is stored and displayed in VRAM40 in the processing, the upper three frequencies and the transmission / reception frequency f are displayed on the matrix display 61 of the LCD60._RThe signal levels for all seven frequencies, including and the lower three frequencies above, are displayed, which is the step frequency Δf and the lowest frequency f._R-3Δf to maximum frequency f_RThe signal levels of multiple frequencies including the frequency band up to + 3Δf and the reception bandwidth is 6Δf are displayed. Further, for example, by making the time (T0 + T1 + T2 + T3) seconds of processing 500 to 502 and processing 504 as small as possible and making the waiting time Tw seconds sufficiently large, the time of processing 500 to 502 and processing 504 (T0). Step S240 most of the time except for + T1 + T2 + T3) seconds (in the processes 500 to 502 and process 504, the squelch switch 11 is turned off and the low frequency signal of the received signal is not output from the speaker 13). To transmit / receive frequency f in S246_RThe low-frequency signal of the modulated wave of the received signal can be heard using the speaker 13.

【0095】

Here, since the signal levels of the seven frequencies are always stored in the VRAM 40, substantially, the desired transmission / reception frequency f_RWhile listening to the low-frequency signal of the modulated wave of the received signal of the above using the speaker 13, the signal levels of a plurality of frequencies displayed on the matrix display unit 61 can be observed. Therefore, the transmission / reception frequency f that is currently set and is being received._RThe signal level of and the signal level of each of the six frequencies in the vicinity can be easily observed.

【0096】

Here, the standby time Tw may be configured to be variably set by the operator using the numeric keypad 32 according to the communication status, and the Tw is preferably set to 10 to 30 seconds. According to the prototype experiment of the present inventor, it was confirmed that the level detection display processing for one frequency can be suppressed to 0.01 ms or less.

【0097】

The memory channel mode processing (step S4) is executed in the same manner as the VFO processing (step S5) except for the following processing. Here, it is assumed that the channel number preset by using the rotary encoder 31 or the numeric keypad 32 is a natural number m, and the transmission / reception frequency at that time is fm. At this time, the set frequency fset is set to fm. (a) The "M" liquid crystal display unit 65 is displayed on the LCD60. (b) Frequency data {Df in step S211_LO-f (m-3)} to local oscillation frequency data Df_LIs set as. (c) Frequency data {Df in step S221_LO-f (m-2)} to local oscillation frequency data Df_LIs set as. (d) Frequency data {Df in step S231_LO-f (m-1)} to local oscillation frequency data Df_LIs set as. (e) Frequency data {Df in step S251_LO-f (m + 1)} is the local oscillation frequency data Df_LIs set as. (f) Frequency data {Df in step S261_LO-f (m + 2)} to local oscillation frequency data Df_LIs set as. (g) Frequency data {Df in step S271_LO-f (m + 3)} to local oscillation frequency data Df_LIs set as.

【0098】

When the wireless transmitter / receiver is set to the memory channel mode, the search mode, and the search receiveable mode and the reception state is repeated, when the level detection display processing of one frequency is performed, the signals for the other six frequencies are displayed. Since the levels are stored and displayed in the VRAM 40 in the previous level detection display process, the frequencies of the seven memory channels from channel numbers (m-3) to (m + 3) are displayed on the matrix display 61 of the LCD60. The signal levels of are displayed, which displays these seven signal levels. Therefore, the signal levels of the currently set and received memory channel and the six memory channels in the vicinity of the memory channel number can be easily observed even if the frequencies are far apart from each other. In the above operation modes, each signal level is displayed when the seven channel numbers are arranged in ascending order, and the displayed channel number is the signal of the received signal corresponding to the seven channel numbers selected in advance by the operator. The level may be displayed.

【0099】

As described above, in the VFO mode and the memory channel mode, by selecting the receivable mode as the search mode, a plurality of reception circuits are used to receive only the high frequency signal of one reception frequency. The process of detecting and storing the signal level of the frequency and the process of outputting the output of the FM demodulator 8 to the speaker 13 are performed in a time-divided manner, and substantially the desired transmission / reception frequency f._RWhile listening to the low-frequency signal of the modulated wave of the received signal of the above using the speaker 13, the signal levels of the seven frequencies displayed on the matrix display unit 61 can be easily and substantially simultaneously observed. For example, in the VFO mode, the spectrum can be displayed in a pseudo manner by reducing the step frequency. The time division processing may be performed at the same time. In this case, the desired transmission / reception frequency f_RWhen a received signal of six frequencies other than the received signal of is received and the signal level is higher than the squelch level, it is possible to accompany a buzzing sound.

【0100】

In this embodiment, unlike the conventional example of FIG. 2, the original signal receiving circuit and the receiving circuit for spectrum display are not provided, and only the former one receiving circuit is provided. Compared with the conventional example shown in Fig. 2 and the case where a spectrum analyzer is provided separately, it is possible to realize a wireless transceiver with a signal level display function of multiple frequencies, which has an extremely simple circuit configuration and low manufacturing cost. ..

【0101】

Further, in the conventional example of FIG. 2, the bandwidth when measuring the received signal at the time of spectrum display is substantially determined by the passband of the passband filter in the scope IF amplifier 112, and if the signal level meter 109 If you want to set the same as the received signal level displayed in, you need to change the setting so that the bandwidth of the passband filter in the IF amplifier 104 is the same as that of the scope IF amplifier 112. On the other hand, in this embodiment, since the same receiving circuit is used for processing, it is not necessary to change the setting, and a plurality of frequencies (VFOs) located in the vicinity of the frequency of the received signal currently being received are not required. The signal level (in the mode) can be easily grasped by looking at the matrix display unit 61 of the LCD 60 under the same reception conditions as the received signal being received. This makes it easy to find an empty channel or a used channel at a nearby frequency. The former grasp of free channels is effective especially when most channels such as urban areas are busy, while grasping the channels used is extremely effective especially for channels used in areas other than urban areas. It is effective when there are few.

【0102】

Further, in the reception state, since the number of pixels in the horizontal direction is set to be larger than the number of pixels in the vertical direction as described above in the search mode, the matrix display unit 61 of the LCD 60 has seven frequencies that change in the vertical direction. While displaying each signal level related to the high frequency signal of, in the normal mode, a plurality of signal levels of the high frequency signal being received, which change in the horizontal direction using the lowermost 2 rows and 7 columns of the matrix display unit 61, are displayed. It is possible to display with more steps than the frequency signal level display, that is, with a higher number of steps at the signal level.

【0103】

Although the wireless transmitter / receiver has been described in the above examples, the present invention is not limited to this, and the present invention can be applied to a wireless receiver, a wired receiver, or a wired transceiver that receives a high frequency signal. Further, in the above examples, an example of an FM transceiver is described, but the present invention is not limited to this, and can be applied to a transceiver or receiver of any modulation method such as AM, SSB, FSK. .. In the above examples, the receiver provided with one system of receiving circuits has been described, but the present invention is not limited to this, and the present invention may be applied to a receiver provided with a plurality of systems of receiving circuits.

【0104】

In the above embodiment, the VRAM 40 and the registers 41, 42, 43, 44, which are the memories for storing the display data in the LCD 60, are provided separately from the MPU30, but the present invention is not limited to this, and 1 A chip microprocessor may be used.

【0105】

In the above embodiment, the transmission frequency and the reception frequency are set to be the same at the set frequency fset, but even if they are set to be different from each other by a predetermined frequency for repeater operation such as amateur radio. Good.

【0106】

In the above embodiment, the signal level is displayed in the horizontal direction using the matrix display unit 61 of the LCD60 in the normal mode, and the signal level is displayed in the vertical direction using the matrix display unit 61 in the search mode. These display directions are not limited to this, and for example, these display directions may be reversed.

【0107】

In the memory channel mode processing (step S4) in the above embodiment, the signal levels of the received signals of a plurality of channels are displayed side by side in the ascending order of the channel numbers, but the present invention is not limited to this, and the signal levels are arranged in the descending order of the channel numbers. May be displayed.

【0108】

In the above embodiment, the signal level of the received signal is displayed on the matrix display unit 61 of the LCD60 so as to change in the horizontal direction in the normal mode, but the present invention is not limited to this, and the signal level is changed in the vertical direction. It may be displayed. Further, in the search mode, each signal level of the spectrum is displayed on the matrix display unit 61 of the LCD60 so as to change in the vertical direction. However, the present invention is not limited to this, and the signal level is displayed so as to change in the horizontal direction. You may. Further, the signal level display direction may be changed when the signal level is displayed and when the spectrum is displayed, or the signal level may be displayed in the same direction without being changed.

【0109】

Although the setting process related to the set frequency fset is performed in step S45 of FIG. 11, if the set frequency fset is not changed, the process of step S45 may not be performed.

【0110】

In FIG. 15, in step S245, it is determined whether or not to execute the standby process of Tw for a predetermined time (see step S246) depending on the presence or absence of the received signal, but it is determined according to the signal strength of the received signal. Or the process of step S245 may be deleted. In this case, the standby process in step S246 is executed regardless of the signal level of the SD signal, that is, regardless of the presence or absence of the received signal.

【0111】

In FIG. 15, when YES in step S245, the process directly proceeds to step S250, but the present invention is not limited to this, and the standby process for waiting for the preset waiting time Twa may be executed to proceed to step S250.

【0112】

By changing the standby time Tw and / or the standby time Twa, a process of detecting and storing signal levels of a plurality of frequencies using one receiving circuit and an output of the FM demodulator 8 to the speaker 13 It is possible to change the ratio of the operation time of each of the above processes when the output process is performed in a time division manner.

【0113】

In the above embodiment, the local oscillator 4 is configured by using a PLL circuit, but in order to shorten the operation time for changing and setting the local oscillation frequency, a ROM that stores the signal waveform level in advance is used. A DDS circuit that generates a local oscillation signal having a predetermined local oscillation frequency may be used.

【0114】

In the above embodiment, when the SD signal is L level, the signal level is detected and stored for one reception frequency in steps S240 to S246, and the demodulated low frequency signal is output to the speaker 13. Not limited to this, the signal levels may be sequentially detected and stored for a plurality of reception frequencies, and the demodulated low frequency signals may be sequentially output to the speaker 13.

【0115】

In the above embodiment, the ore gate OR1 is provided on the outside of the MPU30, but it may be realized by the software for internal processing of the MPU30.

【0116】

[Effect of the invention]

As described in detail above, according to the present invention, in the display device of the receiver that receives the high frequency signal at a predetermined reception frequency, the reception frequency is selectively switched in an arbitrarily set switching order, and the receiver The detection and storage means for detecting and storing the signal strengths of the plurality of received N reception frequencies, which are a part of all the plurality of reception frequencies that can be received by the above, and the plurality of reception frequencies. A plurality of N display units corresponding to each of the above are juxtaposed, and the signal strengths of the plurality of stored N reception frequencies are displayed on the plurality of N display units in accordance with the switching order. By shifting the signal strength of each of the plurality of N reception frequencies stored in the detection and storage means by one in response to the change in the reception frequency, the plurality of N reception frequencies displayed on the display means are displayed. After shifting the display position of the signal strength of, when the signal strength of the reception frequency is shifted, the data of one signal strength is lost in the detection storage means, while the data of one signal strength becomes empty. A control means for controlling the signal strength of the new reception frequency to be displayed on one display unit located at one end of the plurality of N display units by detecting and storing the signal strength of the frequency. Be prepared. Therefore, in the plurality of display units of the display means, the signal intensities of the plurality of reception frequencies that are a part of all the plurality of reception frequencies that can be received by the receiver are set according to the switching order. In addition to being able to display, the display position of the signal strength of the plurality of frequencies can be shifted and changed in response to the change in the reception frequency by using the detection and storage means composed of a memory having a relatively small capacity. This makes it possible to easily and substantially simultaneously observe the signal intensities of a plurality of frequencies. In addition, there is an advantage that an empty channel or a used channel at a nearby frequency can be easily found. Further, when the signal strength of the reception frequency is shifted, the data of one signal strength is lost in the detection storage means.

[Simple explanation of drawings]

[Figure 1]

It is a block diagram of the wireless transceiver with the signal level display function of a plurality of frequencies which is one Example which concerns on this invention.

[Figure 2]

It is a block diagram of the wireless receiver with a spectrum display function of a conventional example.

[Fig. 3]

It is a front view of the LCD of FIG.

[Fig. 4]

It is a front view which shows the relationship between the liquid crystal pixel of the matrix display part of the LCD of FIG. 3 and the address of VRAM which stores pixel data.

[Fig. 5]

It is a front view of the LCD which shows an example when the signal level of a plurality of frequencies is displayed in the VFO mode and the search mode in the wireless transceiver of FIG.

[Fig. 6]

It is a front view of the LCD which shows an example when the received signal level is displayed in the VFO mode and the normal mode in the wireless transceiver of FIG.

[Fig. 7]

FIG. 5 is a front view of an LCD showing an example of displaying signal levels of a plurality of frequencies in the scan search mode when the transmission / reception frequency is scanned in a high direction in the VFO mode in the wireless transceiver of FIG. 1.

[Fig. 8]

FIG. 5 is a front view of an LCD showing an example of displaying signal levels of a plurality of frequencies in the scan search mode when the transmission / reception frequency is scanned in the low direction in the VFO mode in the wireless transceiver of FIG. 1.

[Fig. 9]

It is a flowchart of the main routine executed by the CPU of the wireless transceiver of FIG.

[Fig. 10]

It is a flowchart of the first part of the subroutine of the key input processing of FIG.

[Fig. 11]

It is the flowchart of the 2nd part of the subroutine of the key input processing of FIG.

[Fig. 12]

It is a flowchart of the subroutine of VFO mode processing of FIG.

[Fig. 13]

It is a flowchart of the subroutine of normal processing of FIG.

[Fig. 14]

This is the first part of the flowchart of the subroutine of search receivable processing in FIG.

[Fig. 15]

This is the second part of the flowchart of the subroutine of search receivable processing in FIG.

[Fig. 16]

This is the third part of the flowchart of the subroutine of search receivable processing in FIG.

[Fig. 17]

It is a flowchart of the subroutine of the display change processing of FIG.

[Fig. 18]

It is the flowchart of the subroutine of the upward display change processing of FIG.

[Fig. 19]

It is the flowchart of the subroutine of the downward display change processing of FIG.

[Fig. 20]

It is the flowchart of the subroutine of the upward display data replacement processing of FIGS. 18 and 23.

[Fig. 21]

It is the flowchart of the subroutine of the downward display data replacement processing of FIGS. 19 and 24.

[Fig. 22]

It is the flowchart of the subroutine of the scan search receivable processing of FIG.

[Fig. 23]

It is the flowchart of the subroutine of the scan search upward processing of FIG.

[Fig. 24]

It is the flowchart of the subroutine of the scan search downward processing of FIG.

[Fig. 25]

It is a timing chart centering on the signal level display processing of a plurality of frequencies in the wireless transceiver of FIG.

[Fig. 26]

It is a figure which shows the frequency of 7 signal levels displayed in the matrix display part 61 of the liquid crystal display part, and the transmission / reception frequency displayed in 7-segment liquid crystal display part 67 when the transmission / reception frequency is scanned by the manual scan search.

[Fig. 27]

Scans the transmission / reception frequency in the higher direction The seven signal level frequencies displayed on the matrix display 61 of the liquid crystal display when the transmission / reception frequency is scanned by the automatic scan search, and the transmission / reception displayed on the 7-segment liquid crystal display 67. It is a figure which shows the frequency.

[Fig. 28]

Scans the transmission / reception frequency in the lower direction The frequencies of the seven signal levels displayed on the matrix display 61 of the liquid crystal display when the transmission / reception frequency is scanned by the automatic scan search, and the transmission / reception displayed on the 7-segment liquid crystal display 67. It is a figure which shows the frequency.

[Fig. 29]

Seven signal level frequencies displayed on the matrix display 61 of the liquid crystal display when scanning the transmission / reception frequency in a modified example of the automatic scan search that scans the transmission / reception frequency in the higher direction, and displayed on the 7-segment liquid crystal display 67. It is a figure which shows the transmission / reception frequency which is performed.

[Fig. 30]

Seven signal level frequencies displayed on the matrix display 61 of the liquid crystal display when scanning the transmission / reception frequency in a modified example of the automatic scan search that scans the transmission / reception frequency in the lower direction, and displayed on the 7-segment liquid crystal display 67. It is a figure which shows the transmission / reception frequency which is performed.

[Explanation of symbols]

1 ... antenna, 2 ... RF amplifier, 3,24 ... mixer, 4 ... local oscillator, 5 ... IF bandpass filter, 6 ... IF amplifier, 8 ... FM Demodulator, 9 ... low frequency pass filter, 10 ... transmit / receive selector switch, 11 ... squelch switch, 12 ... AF amplifier, 13 ... speaker, 14 ... high frequency pass filter, 15 ... squelch level adjustment oscillator, 16 ... noise amplifier, 17 ... detection circuit, 18 ... waveform shaping circuit, 19 ... detection circuit, 20 ... A / D converter, 30 ... MPU, 31 ... rotary encoder (RE), 32 ... ten keys, 33 ... step frequency selection key, 34 ... frequency change unit selector switch, 40 ... VRAM, 41,42, 43,44 ... Register, 50,51,52,53,54 ... LCD driver, 60 ... LCD, 61 ... Matrix LCD display, 63a, 63b, 63c ... Center indicator LCD Display, 67 ... 7-segment LCD display, OR1 ... Orgate, SW1 ... PTT switch, SW2 ... VFO mode / memory channel mode selector switch, SW3 ... Normal mode / search mode selector switch , SW4 ... Receivable mode / Unreceivable mode selector switch, SW5 ... Normal mode / Scan search mode selector switch.