Pacific Research Solutions RI-1 User Manual
Page 9
Pacific Research Solutions
RI-1 and PE-1 User Manual
Page 3
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 6 of this manual for more complete details on correct adjustment of the audio levels.
Receiver Gain
1. Generate a 1000 Hz tone at 5 kHz of deviation on the repeater input.
2. Using an AC volt meter, adjust VR2 for 0.77 volts AC RMS on U6 pin 7.
Signal Polarity
Verify that the NSQ, TSQ and PTT signals are of the correct polarity. This can be viewed with the LEDs on the circuit board
or from the programming software. To change any of these signal polarities, use System Command 00 or the programming
software (PS-3). See section 6 for more details on this subject.
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 3
KHz 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 adjusted by the single turn
pot, VR1. If you are operating the controller as a repeater, you will have to issue User Command “*1” to set the controller into
a repeater mode.
OPERATION
Once you have connected your controller to a receiver / transmitter and adjusted the audio, you should then confirm its basic
repeater or link 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.
INITIAL SETTINGS
You are now ready to set the Station ID. This subject is not easily covered in a single paragraph. Therefore, we recommend
that you go to section 8 of this user manual for this procedure.