PS Engineering
PMA8000 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0000 Page 1-1 Revision 9, June 2005
Section I GENERAL INFORMATION
1.1 INTRODUCTION
The PMA8000 represents another evolutionary step in cockpit audio control and intercommunications util-
ity. Using our patented IntelliVox® design, this unit eliminates the requirements for intercom squelch ad-
justments. The unit is designed for outstanding ergonomics and visually defined mode annunciation and
selection.
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 PMA8000.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PMA8000-
series of Audio Selector Panel/Intercom Systems. This includes the following units:
Model
Description Part Number
PMA8000 Stereo Audio Selector Panel with Marker Beacon 050-890-0100
Option 1 Same as above with Digital Recorder added 050-890-0200
Where the functions are identical to all units, it will be referred to herein as a PMA8000. Otherwise, the
applicable units will be specified.
1.3 EQUIPMENT DESCRIPTION
The PMA8000-series is a state of the art audio isolation amplifier and audio selector that contains an auto-
matic voice activated (VOX) intercom system. It can switch two transceivers (Com 1, Com 2 ) and six re-
ceivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).
A full duplex TEL mode allows the PMA8000 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 PMA8000 must be interfaced with an approved system.
There are four unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar al-
timeter warning.
Push buttons select the receiver audio source provided to the headphones. A SPR button allows the user to
listen to the receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio is
muted during transmit. All Unswitched inputs are always presented to the aircraft speaker.
Push button switches selects one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the PMA8000 has the ability to allow the pilot to transmit on
com 1 while the copilot can transmit on com 2. A fail-safe mode connects the pilot headphone and micro-
phone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail-safe)
position.
A six-station voice activated (VOX) intercom is included in the PMA8000. This system has PS Engineer-
ing’s patented IntelliVox® circuitry that eliminates manual adjustments. The system contains six separate
VOX mic circuits, and only opens the microphone channel in use.
The intercom system incorporates pilot isolate, all and crew modes, two independent stereo music inputs
with "Soft Mute," and flashing LED indications for transmit indications. Intercom control is through two
concentric front panel volume controls and a pushbutton intercom mode switch. The small volume knob
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