PS Engineering
PAC45J Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-045-2000
Page 3-4
November 2020
3.6.2
Intercom Volume Control
The outer concentric volume control knob adjusts the loudness of the intercom for the intercom stations(s)
connected to the audio controller panel. It has no effect on selected radio levels, or music input levels.
3.6.3
Intercom Modes
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.
I
SO
:
Each control head has their own ISOLATE selection. The control head is isolated from the intercom
stations and is connected only to the aircraft radio’s that are selected system. They will hear the aircraft radio
reception (and sidetone during radio transmissions).
A
LL
:
Each control head has their own ALL selection. When in the ALL mode, all parties will hear the aircraft
radio, intercom and music. The pilot or copilot control head will decide when the system will be in the ALL
mode by pressing their ICS switch. During any radio or intercom communications,
the music volume automatically decreases. The music volume increases gradually
back to the original level after communications have been completed.
C
REW
: Pilot and copilot are connected on one intercom channel and have exclusive
access to the aircraft radios. The pilot or copilot control head will decide when the
system will be in the ALL mode by pressing their ICS switch. The observers can
communicate with each other and passengers in ALL or OBS mode or select ISO mode.
3.6.3.1
Intercom Operation
If four control heads are used, the following rules apply:
•
System defaults to ALL at power up.
•
Any panel can select ISO and be removed from the intercom.
•
Either pilot or copilot panel can select CRW, and place both panels in Crew mode.
•
Either pilot or copilot panel can select ALL and add everybody to the intercom.
•
The Observer 1 and Observer 2 panels can leave and return to ALL, unless a pilot or copilot has
selected ISO or CREW.
The observer/mission personnel can isolate their audio feed from the crew by pressing the ICS button. When
the CTL45J is in ISO mode, the observer/passengers will have intercom among themselves, and be able to
use the selected radios.
If the observer personnel would like to CALL the crew intercom stations. On the observer control head
(CTL45A)desire to communicate with the crew, pressing “ACK” button will activate an ICS call light and a
chime in the crew headsets and crew control head. Speaker operation
To activate the cockpit speaker, press the SPR button. This will place all received audio selected on the
CTL45J over the cockpit speaker. Pilot, copilot, and observer have their own speaker outputs.
Pilot is 10-watt output. Copilot and observer are 2Vpp and will require
an external speaker amp to drive low impedance speaker. PS Engineering
has available the FAA TSO PSA210 Dual Speaker Amplifier.
3.7
Bluetooth® connection
The PAC45J has an internal Bluetooth module (FCC ID: QOQWT32i), no external boxes required, external
antenna will be required. The audio controller is always “discoverable,” so you just need to search for the
PAC45 from your Bluetooth-equipped phone or music source. Default access code is not required. Once the
PAC45 has been “paired” with your Bluetooth device, the TEL distribution will act as described in §
Currently, there is no option to change the Bluetooth ID name.