Intercom Volume Control; Intercom Modes - PS Engineering PAC45J Pilot's Manual And Operation Manual

speech and clip syllables in a quiet cabin, such as in the hangar, or without
the engine running. This is normal.
For optimum microphone performance, PS Engineering recommends instal-
lation of a Microphone Muff Kit from Oregon Aero (1-800-888-6910). This
will not only optimize VOX performance, but will improve the overall clar-
ity of all your communications.
Push to talk intercom (PTT ICS) (1)
Pressing the intercom volume knob (VOX PTT) will place the system into
the Push-to-talk (PTT for Intercom use) mode. This will
disable the voice activation (VOX) and require that the
external push to talk intercom buttons for each position be
used to speak on the intercom.
Push the knob again and the systems toggles back to voice
activation. The mode is shown by the green indication in
the text.

Intercom Volume Control

The outer concentric volume control knob adjusts the loudness of the inter-
com for the intercom stations (s) connected to the audio controller panel. It
has no effect on selected radio levels, or music input levels.
Monaural headsets
The pilot and copilot positions work with stereo or mono headsets. Howev-
er, MultiTalker will not be presented correctly unless stereo headsets are
used, and oriented correctly on the head, left and right.
NOTE: For the full effect of MultiTalker® Dimensional Sound, stereo
headsets must be used, and the left/right orientation observed.
Some passenger headsets are connected in parallel. Therefore, if a monaural
headset is plugged in to a PAC45J Stereo installation, one channel will be
shorted. Although no damage to the unit will occur, all passengers with
stereo headsets will not hear one channel, unless they switch to the
"MONO" mode on their headset.

Intercom Modes (2)

The "ICS" pushbutton switch on the panel provides the
selection of the intercom modes
The intercom mode defaults to "ALL" at power up. Then the button cycles
through the intercom modes, from bottom to top, then top to bottom: ALL
CRW ISO, CRW. A green indicator shows which mode is currently active.
Iso: Each control head has their own ISOLATE selection. The control head
is isolated from the intercom stations and is connected only to the aircraft
Page 6 202-045-2200 Oct. 2021 PAC45J Pilot Guide