Specifications

PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0100 Page 2-7 Revision 8, May 2008
Any signal appearing in the hard wired unswitched audio inputs will always mute the entertainment
sources, even though the passengers may not hear the audio tone itself.
Press the Mute switch to activate the Karaoke mode (disabling crew SoftMute™), This allows the pilot to
place the entertainment into the background while having the radios in the foreground. This eliminates the
constant interruption of the music while still having the radios a priority.
CAUTION
Local oscillators and internal signals from entertainment equipment can cause undesired interference with
other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any ad-
verse effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch off
the entertainment devices.
All additional entertainment devices must be switched off for both takeoff and landing.
2.5.2.1 Entertainment 2 Mute (J2 Pin 13 & 14)
Connecting J2 pin 13 to pin 14 (or ground) through a SPST switch places the entertainment #2 music
source into the Karaoke Mode. In this mode, incoming music and intercom conversation will not mute the
music for the passengers’ intercom net. This allows uninterrupted music during casual conversation and at
times when radio communications are of lesser importance.
If desired, the AUX button can act as the passengers’ mute control. Connect J2 pin 18 (AUX logic) to J2
pin 13 (Entertainment. 2 Mute inhibit).
2.5.3 Configuring Music Input with Function Keys
The two music inputs can be configured by the user from the front panel (see section 3.10). There are three
configurations available, independent, ICS mode dependent, and single input.
If the inputs are independent, Input #1 (and the front jack) is provided to the pilot and copilot. Muting
(SoftMute™) is controlled by the front panel “mute” button.
If the inputs are intercom mode dependent, input 1 goes to the pilot, copilot and all passengers when the
intercom is in the “ALL” mode. In “ISO” mode, the copilot and passengers will hear music input 1. Music
2 is ONLY active in CREW mode, and then provided only to the passengers. The passenger SoftMute™
control becomes active in CREW.
If the single-source mode is activated through the function keys, the front panel jack (and music 1) is con-
nected to all intercom positions, regardless of the intercom mode. Crew muting is controlled by the front
panel, passenger muting controlled through the switch. See section 3.11 for more details.
2.5.3.1 Annunciation and recorder playback
In units above serial number J01861, the pilot and copilot can hear the Function Key annunciations. If the
customer wants to exclude IRS and function key annunciation playback from the copilot position, contact
PS Engineering for more information.
2.5.4 Playback button Installation
Internal Recorder can be played back from the front panel. A remote momentary, normally open (NO) push
button switch may be installed if desired to remotely activate the Recording System playback. This switch
can be located anywhere in cockpit convenient to the pilot's reach. The switch should be connected to pin
22 of J2 of the PMA8000B, and ground..
2.6 Marker Beacon Installation
2.6.1 Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included). Re-
fer to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2A (or later revi-
sion), Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna
must be mounted on the bottom of the aircraft.