PS Engineering
PMA7000BT Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0204
Page 2-8
Rev. 1, July 2015
All additional entertainment devices must be switched off for both takeoff and landing.
2.5.14.1.3 Entertainment 2 Mute (Pin V)
The ICS button on the PMA7000BT
controls the muting (“Karaoke mode”) of entertainment source #1.
Connecting J2 pin V to 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 connection.
2.5.15 PMA7000BT Intercom expansion (J2, Pins P, S, and C)
The PMA7000BT contains a 6-place intercom. In applications where more intercom positions are needed,
PS Engineering can provide intercom expansion units, such as the IntelliPAX, part number 11606, 11606R,
etc. These can add up to six additional stereo intercom stations, plus independent music input. Interface to
the expansion unit is through J2, pins P (audio input from expansion unit), S (audio output to expansion
unit) and C (9 VDC expansion power).
2.6
Marker Beacon Installation
The marker beacon receiver is included in the PMA7000BT.
2.6.1
Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included). Refer
to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2A (or later revision),
Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna must be
mounted on the bottom of the aircraft.
2.6.2
External Marker Lights (Marker version)
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 +7 VDC
4 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell
dimming.
2.6.3
Middle Marker Sense (Marker version)
A Middle Marker Sense output signal is available from the PMA7000BT 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 2.
2.6.4
Marker Audio Input (non-marker version)
Version no available
2.7
Adjustments
The PMA7000BT is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. There are five adjustments however, that will allow the installer to tailor the specific functions.
Unswitched input #3 can be attenuated by adjusting VR1 accessible through the bottom of the bottom
board under the black antistatic cover
, and labeled “
unsw aud.
”
COM 3 volume (for satellite phone volume) is adjusted with VR73, located on the bottom board, but acces-
sible through the top board.
The unit will have to be removed from the tray to make these adjustments.