PS Engineering
PMA8000 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0000 Page 2-7 Revision 9, June 2005
2.4.14.1.2 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.
See section 2.4.14 for alternative music connection to allow the passengers and crew to use the same input.
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). This is NOT recommended if AUX is also used to switch audio.
2.4.15 Playback button Installation (J2, Pin 22- Option 1, ONLY)
To activate the Recording System playback, a momentary push button switch is required. This switch can
be located anywhere in cockpit convenient to the pilot's reach. The switch must be connected to pin 22 of
J2 of the PMA8000, and ground
2.5 Marker Beacon Installation
2.5.1 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.
2.5.2 External Marker Lights
For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt
lamps only. The external output lamps are driven high (typically +9 VDC ±1.5 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell dim-
ming.
2.5.3 Middle Marker Sense (Marker version)
A Middle Marker Sense output signal is available from the 8000 to flight control systems. This function
will not operate during the test mode. This output will go to +4.5 VDC (± 1.0 VDC) when a valid Middle
Marker signal is received. This output is J1, pin 39.
2.6 Adjustments
The PMA8000 is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. There are three adjustments in the top cover that allow the installer to tailor the specific functions.
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