Sigtronics SPCC-2, Руководство по эксплуатации

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8
INITIAL SYSTEM CHECK-OUT
The following System Check-Out will provide you with a "personalized"
system. Perform the next few steps while on the ground to assure that
all functions on the unit and radios are set to your personal hearing
and speaking comfort.
CAUTION - As is standard practice with all aircraft equipment, be
sure that the radio(s) and the SPCC are turned OFF when you start up
the aircraft engine.
1. To assure that the aircraft radios, and pilot's headset and
PTT switch are connected and functioning properly, put
ON/BYPASS switch into "BYPASS" position. Then turn on the
aircraft radios, and verify that the pilot can hear the
radios and can transmit using his push-to-talk switch and
headset. All other intercom functions should be inoperable
in the BYPASS mode.
2. Intercom operation and adjustment can be performed by the
following procedure:
A. First set the ON/BYPASS switch to the "ON" position and turn
both REC VOL controls all the way down
(counterclockwise).
B. Turn both intercom volume controls to the 9 o'clock
position and both squelch controls all the way up
(clockwise). Notice the intercom is now continually
activated and you should be able to talk between
headsets.
C. To adjust the intercom squelch controls for voice
activated operation (VOX), it is helpful to have some
background noise present. It may also be necessary to
turn up the intercom volume controls. Turn both
intercom squelch controls all the way counterclockwise.
Now, without speaking, rotate one of the squelch
controls clockwise until you hear the background noise
in your headset. Next, using that same control, rotate
counterclockwise small, incremental amounts until the
background noise disappears. (This procedure is
necessary because the squelch is a "fast on, slow off"
system). That squelch control is now set.
D. Adjust the other intercom squelch control similarly by
turning it clockwise until you hear background noise.
Rotate counterclockwise incremental amounts until the
background noise disappears.
Small adjustments may be necessary if aircraft
background noise changes significantly - such as from
idle to full power.