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compare it to the volume level when talking on the intercom. If there is a
difference in levels, adjust the equalization trimmer (labeled RADIO) on the
rear panel of the PC 2 until the radii level is the same as the intercom level.
Set the power switch to OFF (FAILSAFE) when the intercom is not in use to
consewe battery power. In th'is position the pilot phones are connected
directly to the radio (the pilot microphone signal is always connected to the
radio except when copilot is transmitting).
Rear
Panel
Trimmer
Controls
AUTOMATIC SQUELCH OPERATION
The
PC
2
contains
an
automatic
squelch
circuit
which
makes
most
manual
squelch
adjustments
unnecessary.
This
circuit
uses
a
built-in
microphone
to
monitor
the
noise
level
in
the
aircraft. The
microohone
is
located
on
the
top panel of the PC 2 next to the pilot MIC and PHONE jacks. For proper
operation, do not obstruct the microphone.
In most cases the manual squelch control should be left in the extreme
clockwise ~osition. and the automatic sauelch circuit will comoensate for
most chan'ges in ambient noise level; hdwever, if the ambieninoise level
during operation of the aircraft becomes too loud and causes undesirable
intercom activation, rotate the squelch control slightly counterclockwise until
the intercom audio tums off. The intercom should reactivate when speaking
into either microphone.
Squelch
Circuit
Microphone
ACCESSORY INFORMATION
Optional Aircraft Power Cable
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Catalog No. 96513-000
2-Foot (0.6 m), with Cigarette Lighter Plug
Model PT-300 Push-To-Talk Switch
. . . . . . . . . . . . . . . . . . . . . . . . . .
Catalog No. 63966-000
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