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Copyright 1993 Link Communications
Transmitter Audio:
- The RLC-1 provides a 10K
S
output impedance to your transmitter audio input.
- The transmitter audio is connected to pin #4 of the DB-9 connector.
- The audio levels will be adjusted in Step #5.
- If it is not already, the DB-9 plug can now be plugged into the appropriate jack on the main
board. The link port is located to the left of the main port connector.
Step #5: Adjusting the RLC-1 Controller
Locate connector J10 on the RLC-1 (it is above the 2 voltage regulators). This test bus will
provide the signals that we need to adjust the inputs on the RLC-1. In order to maintain audio
deviation during channel switching, all of the receiver inputs must be set to the same level. These
signals can be measured with an oscilloscope or an AC voltmeter. If you are using a meter, you
will need to adjust to 1.4 volts RMS, which is equivalent to 2.0 volts peak-to-peak measured with
an oscilloscope. In order to obtain an audio signal on J10, a valid COR or PL must be received
(See Access Modes for the proper signal style).
Main Receiver: Transmitter Port Adjustment:
- Present a stable DTMF tone to the Main RX.
- Adjust the Main RX pot on pin 1 of J10 (Labeled MI) to 2 volts peak-to-peak.
- This pot is Labeled MAIN REC. R11
- Adjust the Main TX pot to obtain the desired deviation.
Link Receiver Port Adjustment:
- Present a stable DTMF tone to the Link RX.
- Adjust the Link RX pot on pin 2 of J10 (Labeled LI) to 2 volts peak-to-peak.
- This pot is Labeled LINK REC. R15
- Adjust the Main TX pot to obtain the desired deviation.
Main Transmitter Adjustment:
- Present the Main RX with the same DTMF tone used earlier.
- Adjust R19 (MAIN TRANS.) Pot to the desired deviation.
- Access to the Main TX Audio is available at J10, Pin 5 (Labeled MO)
Link Transmitter Adjustment:
- Present the Main RX with the same DTMF tone used earlier.
- Command Main-Link Connection using Command C000
- Adjust R25 (LINK TRANS.) Pot to the desired deviation.
- Access to the Link TX Audio is available at J10, Pin 6 (Labeled LO)
Beep Adjustment:
- Adjust R4, MAIN TONE until it "sounds" good, or about 1.5 Khz. Deviation
- Adjust R5, LINK TONE until it "sounds" good, or about 1.5 Khz. Deviation
Содержание RLC-1
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