Pacific Research Solutions RI-1 - Manual (Page 22)

Pacific Research Solutions RI-1 and PE-1 User Manual
Page 16
SECTION 6 ADJUSTMENTS
Adjusting the audio levels in your controller is very important, in order to avoid clipping or distorted audio. In this section you
will find various features in the controller to help you through this process.
Warning: Refer to section 8, Initialization procedure. When a full controller initialization is performed all digital pot settings
are returned to their default settings. Do not perform the initialization procedure at this time. During full controller
initialization, all system settings, user commands, macros, messages, and digital pot settings will be returned to their defaults.
Note:
If you are having startup problems, check the following items.
1. When entering your password for the first time, make sure the NSQ, TSQ and DTMF status LED’s are operating properly.
Most of the startup problems will relate to logic levels or audio level too low, too high, too much DTMF twist and/or audio
distortion. The RI-1 design has a wide dynamic range for all of the decoders and should work in most conditions.
2. The un-key of your radio when sending a command is a normal command termination. If you are experiencing a problem
when getting started or the COS is always on, you can send a command as normal and wait about 3.5 seconds from the last
digit for the controller to try to process the command.
3. If you experience some problems decoding DTMF, the likely problem is that the tone levels are out of range. The DTMF
decoder has a 30+ dB dynamic range, so that decoding DTMF should not be a problem with a reasonable discriminator
input level. The DTMF status LED illuminates when a tone is first decoded and remains lit until after, either a function
complete or at the completion of a DTMF Inter-digit time-out. If you experience problems where one row or column that
did not decode properly. You may need to check the receiver level or frequency response. To test this, you send one digit
at a time, checking all DTMF tone digits, letting the LED light go out after each one. Then test the next tone, confirming
that all YOUR tones are being properly decoded.
4. If you send your password multiple times and receive an “ERROR” telemetry message, the controller may already be
unlocked and in programming mode.
SETTING RECEIVER INPUT GAIN (R3)
Setting the receiver input gain may be the most important adjustment in the controller. For the internal decoders (DTMF) to
work properly, you need to set up the receiver input audio level correctly. The receiver input audio level setting is a manual
adjustment. Please use the follow the procedure:
1. Apply the 12 VDC power source. Confirm that all 4 LEDs flash on for about 1 second. After power up, some LEDs may
remain on. Do not be concern at this point as we have not completed adjusting your controller.
2. Transmit a carrier on the repeater’s input channel. Did the yellow NSQ light come on? Do not be surprised if the NSQ
LED did not come on or is already on, as we have adjustments to make before the NSQ logic will work correctly.
3. Generate a 1000 Hz tone at 5 kHz deviation on the repeater input.
4. Using an AC volt meter that has high frequency response, probe U6 pin 7 for 0.77 volts AC RMS. Use the supply ground
for your negative connection.
5. The receiver input level is adjusted by the single turn pot VR2.