PS Engineering PMA7000B Installation Manual - Manual (Page 20)

PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0005 Page 3-1 Rev. 10, December 2012
Section III OPERATION
GENERAL INFORMATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA7000B, Audio Selector
Panel/Intercom Systems. Please read it carefully before using the equipment so that you can take full ad-
vantage of its capabilities.
This section is divided into four sections covering the basic operating areas of the PMA7000B systems.
They are Audio Selector, Transceiver Selection, Intercom, and Marker Beacon Receiver (Marker version
only).
MARKER INDICATOR LAMPS
MARKER MODE
RECEIVE AUDIO SELECT ORS
CREW ICS VOLUME (INNER)
PASS ICS VOLUME (OUTER)
IINTERC OM MODE
TRANSMIT SELECT ORS
CREW ICS
CD MUTE CONTROL
SPEAKER CONTROL
Figure 3-1 PMA7000B controls
3.2 Power Switch (EMG-Fail Safe Operation)
Unit power is turned on and off by pushing the volume knob. In the OFF or "EMG" position, the pilot is
connected directly to Com 1. This allows communication capability regardless of unit condition. Any time
power is removed or turned
OFF , the audio selector will be placed in the fail-safe mode.
The power switch also controls the audio selector panel functions, intercom and marker beacon receiver.
3.3 Microphone (XMT) Selection (All models)
There are six pushbuttons associated with the communications transceivers. The lower buttons control
which transceiver is selected for transmit.
The PMA7000B gives priority to the pilot’s PTT. If the copilot it transmitting, and the pilot presses his
PTT, the pilot’s microphone will be heard over the selected com transmitter.
The PMA7000B-Series has an automatic selector mode. Audio from the selected transceiver is automati-
cally heard in the headsets and speaker (if selected). You can check this function by switching from C
OM
1 to C OM 2 and watch the selected audio light on the selector change from COM 1 to COM 2. This en-
sures the pilot will always hear the audio from the transceiver he is transmitting on.
When switching from C OM 1 to C OM 2, while C OM 2 audio had been selected, Com 1 audio will continue
to be heard. This eliminates the pilot having to switch Com 1 audio back on, if desired.