Sigtronics SPCC-2, Руководство по эксплуатации

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12
The A/C Radio Mic Gain Adjustment is located to the left of the FM
radio interface connector. Again, the A/C Mic Gain Adjustment, in
most cases, will not have to be changed from its original factory
setting. If however, your aircraft radio transmissions through the
SPCC are reported as weak or garbled, you will need to reset this
level. The adjustment procedure is similar to that of the FM mic gain
adjustment above. You can, however, use the "BYPASS" mode of the SPCC
to aid in the adjustment. Arrange to have someone with an aircraft
radio nearby with whom you can transmit and receive. Then, proceed as
follows:
Step 1 - Set the ON/BYPASS switch to the "BYPASS" position and
connect the unit as normal to power and aircraft
radios. Plug in the pilot's headset and PTT switch into
the jacks on the left side of the SPCC. (The FM radio
and observer's headsets and PTT switches are not needed
for this adjustment.) On the pilot's side of the SPCC,
set the XMIT SELECT switch to the "A/C" position, the
AUTO/OFF/BOTH switch to "AUTO", and the AUX/OFF switch
to "OFF".
Step 2 - Put on the pilot's headset. Transmit and receive to
your nearby station, using the pilot's PTT switch and
headset, as described in the Initial System Check-Out
section on page 8. Verify good transmission and
reception. In this mode you are bypassing the SPCC and
verifying the clarity of the aircraft radios.
Step 3 - If radios check out OK, then turn the ON/BYPASS switch
to the "ON" position. Verify aircraft radio reception.
If OK, use the pilot's PTT to transmit to your
receiving party. If the receiving station reports weak
transmissions, use the screwdriver to turn the A/C MIKE
GAIN ADJ clockwise a small amount. If they report
garbled or broken transmissions, turn the A/C MIKE GAIN
ADJ counterclockwise a small amount. Repeat as
necessary until the receiving party reports that
transmissions with the SPCC turned "ON" sound as good
as that when the ON/BYPASS switch is "BYPASS" mode.