PS Engineering PMA8000G System Installation And Operation Manual - page 10
PS Engineering
PMA8000G IntelliAudio Audio Selector Panel With flightmate®
Installation and Operator’s Manual
200-890-0912
Page 2-3
Rev. 7, July 2017
ground connections are made directly to the dedicated music signal and ground inputs on the PMA8000G.
The power for IFE and audio panel should be a common bus.
If a music jack instead of a Bluetooth music source is installed for Music 1 or 2, we recommend grounding
the B to airframe ground.
NOTE
Adding a high-performance audio control system, particularly in conjunction with high-performance active
noise canceling headsets, cannot improve on older avionics that were designed for cabin-speaker use. PS
Engineering makes no claim that the audio panel will provide a noise-free audio quality under all installa-
tion conditions, particularly with older avionics.
2.4.2
Existing GMA340 Installation
If the installation replaces a GMA340, no changes are necessary as long as the existing installation meets
the requirements. All existing functions of the GMA340 as well as all of the new capabilities afforded by
the PMA8000G will become instantly available. Be advised, the PMA8000G does not support 3 VHF
COMs, however. The PMA8000G handles two COM transceivers and a full-duplex cellular/satellite tele-
phone.
Added capabilities include, IntelliVox®, DuTel™ duplex telephone, improved music fidelity and Soft
Mute™ and Karaoke™ muting modes, improved and more flexible music distribution control, internal re-
corder function, additional unswitched audio inputs and USB charging port.
Installations where the external marker outputs are connected to a Sandel 3308 Navigation Display will
require additional loading resistors. Refer to the Sandel installation data for more information.
2.4.3
Headphone Wiring
In order for the IntelliAudio® spatial audio to perform correctly, the audio panel must be connected to
stereo headsets, and the left/right outputs wired correctly as shown in
Appendix D
.
2.4.4
Power
The PMA8000G is compatible with both 14 and 28 Volt DC systems. A five (5) Amp circuit breaker is
required for all installations. Power and ground wires should be #22 connected to J2 Pins 8 and 9. Connect
airframe ground to J2 Pin 10 and 11 only. No dropping resistors are required.
2.4.5
Communications Push-to-Talk
An important part of the installation is the PTT (Push-To-Talk) switches that allow the use of your aircraft
communications radio for transmissions. There are three typical configurations that can be used. Select the
case that best fits the installation. Only the person who presses their PTT switch will be heard over the ra-
dio. If the pilot and copilot both use the PTT, the only pilot position has access to the radio. The pilot posi-
tion will have PTT control regardless of the mic selector switch or copilot PTT when the PMA8000G is in
the
OFF
/E
MG
mode.
CASE I: PTT is built into both pilot and copilot yokes.
CASE II: PTT is in pilot yoke only. This configuration requires a modified external PTT switch plugged
into the copilot's microphone jack (See Appendix A). When the copilot's PTT is pressed, the intercom
switches the microphone audio from pilot to copilot mic.
CASE III: No built in PTT. This requires two built in PTTs to be installed, or modified external PTT
switches to be used. Modify external PTT as required. See Appendix A.
2.4.6
Audio Panel interface
The PMA8000G is designed to interface with standard aircraft avionics, and presents a 510
receiver im-
pedance. For best results, a twisted-shielded cable is recommended from the avionics audio source to the
audio panel, with the shield grounded at the audio panel end.