PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0010 Page 1-1 Rev. 25, Feb. 2015
Section I GENERAL INFORMATION
1.1 INTRODUCTION
The PAC24 represents the finest in high-performance cockpit audio control and intercommunications. Us-
ing proprietary IntelliVox® design, this unit eliminates the requirements for intercom squelch adjustments.
The unit is designed for outstanding ergonomics and visually defined mode annunciation and selection.
The PAC24 was designed to be a dual audio panel, offering convenience and utility for two-pilot crews, in
installations where a single panel is not practical.
The PAC24 –0500 is available where a vertical orientation would be appropriate.
Before installing and/or using this product, please read this manual completely. This will ensure that you
will take full advantage of all the advanced features in the PAC24.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PAC24-series
of Audio Selector Panel/Intercom Systems. This includes the following units:
Where the functions are identical to all units, it will be referred to herein as a PAC24. Otherwise, the appli-
cable units will be specified.
NOTE: Observer configuration units cannot be mixed with Standard configuration units.
Observer units MUST be dual installations.
1.3 EQUIPMENT DESCRIPTION
The PAC24-series is a state of the art audio isolation amplifier and audio selector that contains an automat-
ic voice activated (VOX) intercom system. It can switch up to five transceivers (Com 1, Com 2 Com 3
Com 4 and Com 5) and 4 receivers (Nav 1, Nav 2, AUX (or ADF in –0500, -0503) and MKR).
The Duplex Telephone mode allows the PAC24 to act as an audio interface between aircraft headphone and
microphones and specific aircraft approved (FAA/FCC) cellular telephone equipment.
Warning
:
Use of non-aviation approved cellular telephone equipment may be prohibited by regulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PAC24 must be interfaced with an approved system.
There are two unswitched inputs, for autopilot disconnect, and/or radar altimeter warning. Push buttons
select the receiver audio source provided to the headphones. A SPR switch allows the user to listen to the
receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio is muted dur-
ing transmit.
Push button switches select the communication transceivers in use for the pilot and copilot position, and
allow radio transmission. In "Split Mode" the PAC24 has the ability to allow the pilot and copilot to oper-
ate different transceivers independently. The Com 5/TEL mode (selected at installation) allows the pilot to
use the audio panel for duplex operation, such as with aviation-specific cellular telephones.
(8 pages)
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