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Pacific Research Solutions RI-300e User Manual
Page 4
SETTING AUDIO LEVELS
Adjusting the levels in your controller is very important, in order to achieve proper decoder operation and avoid clipping and
distortion. See section 7 of this manual for more complete details on correct adjustment of the audio levels.
Receiver Gain
1. Setting the receiver input gain maybe the most important adjustment in the controller.
2. Transmit a carrier on the repeater’s input channel.
3. Generate a 1000 Hz tone at 1.5 kHz of deviation on the repeater input.
4. While you are sending your test tone, press and hold the button labeled “INIT”. The system LEDs will operate as a level
meter, the first LEDs through “AUX” will indicate 1.5 kHz of deviation.
5. The receiver input level is adjusted by the multi turn pot VR1 labeled “RCVR” located right of the radio interface
connector.
Squelch Level
The RI-300 uses a digital potentiometer for the squelch level setting. Unlock the controller and use S-Command 50 to set the
squelch potentiometer to specific steps or allow up and down control of the potentiometer. You can also use the programming
software to adjust this potentiometer. Set the squelch level until the COS LED goes out, and then add about 4 to 5 counts to the
setting.
Transmitter Level
The best method is to use a service monitor to measure the transmitter deviation. If a service monitor is not available, use any
receiver that can be easily flipped back and forth between the repeater input and output channel while listening to the levels.
Ideally, you will have the same transmit deviation going out of the repeater transmitter as coming in the receiver. Transmit a
3kHz deviation tone on the repeater input channel. As you flip back and forth between the repeater input and output
frequencies, then by listening, adjust the repeater transmitter audio level or deviation. This level is remotely adjusted with a
digital pot, S-Command 12. You can also use the programming software to set the transmitter level potentiometer.
OPERATION
Once you have connected your controller to a receiver / transmitter and adjusted the audio, you should then confirm its basic
repeater operation. This can be done by transmitting a carrier in the input of the repeater and observing the “COS” LED
turning on and off when you key and un-key. You should next see the “PTT” LED turn on while the repeater transmitter is on.
Next, you can confirm the repeater audio path by listening to your self on the output of the repeater. Finally, if you transmit a
carrier with a 100Hz CTCSS tone on the input of the repeater, you should see the “RPT-TSQ” LED go on and some other
LED’s flashing. The flashing LEDs will be described later in this section. See section 8 of this manual for more details on the
controller’s operation and default user commands.
INITIAL SETTINGS
You are now ready to set the Station ID and Tone Squelch (CTCSS) decode. This subject is not easily covered in a single
paragraph. Therefore, we recommend that you go to section 9 of this user manual for this procedure.