Specifications
PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0100 Page 1-1 Revision 8, May 2008
Section I – GENERAL INFORMATION
1.1 INTRODUCTION
The PMA8000B represents another evolutionary step in cockpit audio control and intercommunications
utility. Using our patented IntelliVox® design, front panel utility jack, and pilot programmable configura-
tions, this marks the next level of audio control. The unit is designed for outstanding ergonomics and visu-
ally 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 PMA8000B.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PMA8000B-
series of Audio Selector Panel/Intercom Systems. This includes the following units:
Model
Description Part Number
PMA8000B Stereo Audio Selector Panel with Marker Beacon, includes
utility jack and Internal Recorder System
050-890-0202
1.3 EQUIPMENT DESCRIPTION
The PMA8000B is a state-of-the-art audio isolation amplifier and audio selector that contains an automatic
voice activated (VOX) intercom system and integral marker beacon receiver. It can switch two transceivers
(Com 1, Com 2) and six receivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).
A full duplex TEL mode allows the PMA8000B to act as an audio interface between aircraft headphone
and microphones and specific aircraft approved
(FAA/FCC) cellular telephone equipment, through the
front mounted jack.
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 PMA8000B must be interfaced with an approved system.
There are five unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar al-
timeter warning, with the fifth unswitched input through a front-mounted utility jack, when configured to
act as a fifth unswitched input.
Pushbuttons 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. Unswitched inputs 1,3, and 4 are always presented to the aircraft speaker.
Unswitched input 2 will be presented to the speaker when the front panel SPR push button has been se-
lected.
Pushbutton switches select one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the PMA8000B 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. Unswitched input #1 is also provided to the pilot headphone in fail-safe
A six-station voice activated (VOX) intercom is included in the PMA8000B. This system has PS Engineer-
ing’s patented IntelliVox® circuitry that eliminates manual adjustments. The intercom system incorporates
pilot isolate, all and crew modes, two independent stereo music inputs with "SoftMute™". Intercom vol-
ume control is through two concentric front panel knobs and a pushbutton intercom mode switch. The
small volume knob controls the intercom level for the pilot and copilot, while the large knob controls the
passenger intercom volume. Intercom squelch is automatic.