6
HARDWARE ALIGNMENT
The alignments are preset at the factory and should not need to be adjusted during installation. However, if an
adjustment is needed please follow the procedures below.
RX Input Line Level Adjustment:
1. With voice being received from the base station adjust RP3 while monitoring TP1 with an oscilloscope, so that TP1
shows around 700 mV p-p. Also verify that JP22 Pin 2 shows around 180 mV p-p.
RX Output Line Level Adjustment:
1. With voice being received from the base station adjust RP6 while monitoring the line out with a line level meter and
set for approximately -10 dB on average voice or -5 dB on peak voice.
Pilot Tone Level Adjustment:
1. Prior to performing this step, the line level adjustments above must be done. Set RP2 to the desired dB level (-20 to
+10 dB). Setting the COR Input of the VTE-1 to the inactive state (logic high) will cause the unit to generate the
Pilot Tone.
Note:
If a line level meter is not available for the level adjustment use an AC voltmeter with a DB scale. A voltmeter
would not be set up for balanced 600 ohm audio, but it will provide a close measurement.
