Adjustment Procedure - Omnicom RS-5100 Owner's Manual

ADJUSTMENTS
ADJUSTMENT PROCEDURE
For adjustments of transceiver, connect a 50-ohm dummy load across the antenna terminals. It is recommended that
adjustment be made repeatedly according to the instructions given in the Adjustment Procedure Table.
1.
Pull out the chassis toward the front panel (remove screws on casing).
2.
Maximum modulation degree is 90%. Level setting for over-modulation protection should be performed by VR5.
3.
Standard modulated input (50% mod.) for the microphone is 2mV/600 ohms at lkHz.
4.
Squelch adjustment: Turn the squelch knob fully clockwise. Connect SSG to the antenna terminals and feed
40dB input. Adjust VR3 until squelch opens. Then remove the input signal and turn the squelch knob fully
counterclockwise whereby noise will be heard from the speaker. Turn the knob slowly in clockwise direction and
squelch will be on at approximately 1/3 position of the turning range. Set the knob there. Feed 0dB input signal
from SSG and check that squelch is working properly.
5. Meter setting:
a) RF output
Adjust VR6 so that meter reading shows the 2/3 position on the meter scale while transmitting through 50-ohm
dummy load.
b) Input signal
With 90dB signal fed from SSG, adjust VR1 until the meter reading shows the full right position "10" of the
meter scale in the receive mode.
Note: Power consumption under normal operation:
Receive (squelch on)
200mA (approx)
Transmit (no mod.)
800mA (approx)
Transmit (full mod.)
1300mA(approx)
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