Operation (Continued)
Microphone
1.PTT SWITCH: The
2.REMOTE UP/DOWN SWITCH: The digit on the frequency display above the SHF “cursor” can be stepped up or down by pushing either of these buttons.
For best results, the user should select a
The microphone should provide the functions shown in schematic below.
6 WIRE MIC CABLE
Pin Number | Mic Cable Lead | ||
1 | Audio Shield | ||
2 | Audio Lead | ||
3 | Transmit Control | ||
4 | Receive Control | ||
5 | Up Control | ||
6 | Down Control | ||
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Transceiver Microphone Schematic Diagram
Operation (Continued)
Frequency Selection
Frequency selection in the
1. The first method of frequency selection uses the SHF (Shift) key and the (UP)/ (DOWN) keys located on the front panel. To accomplish this, press the SHF key until the display cursor on the frequency display is positioned under the frequency digit that is to be changed. Use the” ” key to increase the number. Press the “ ” key to decrease the number. Perform the steps described above for each digit until the desired frequency is displayed in the LCD frequency display window.
2.The second method of frequency selection is performed using the SHF key and the FREQUENCY select knob located on the front panel. Use the SHF key in the manner described above to select the digit to be changed. Then rotate the FREQUENCY selector clockwise to increase the frequency and counterclockwise to decrease the frequency.
3.The third method of frequency selection is through the use of the SHF key and the remote UP and DOWN buttons located on the microphone. Frequency selection by this method is accomplished in the same manner as with the “ ” key and the “ ” key on the front panel keypad.
Sometimes when receiving more than one station on a fixed frequency such as on a “Net” or “round table” operation, it is convenient to be able to vary the receive frequency slightly without changing the transmit frequency. To do this, rotate the clarifier control while an off frequency station is transmitting. You can vary the receiver frequency by ±2.5 KHz for clearest voice reception. The clarifier can be optionally modified to vary both Transmit and Receive frequencies together.
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