PS Engineering PMA7000H Installation Manual - Manual (Page 20)

PS Engineering
PMA7000H Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 3-1 Rev. 4, Dec 2012
Section III OPERATION
GENERAL INFORMATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA7000H, 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 PMA7000H systems.
They are Audio Selector, Transceiver Selection, Intercom, and Marker Beacon Receiver (Marker version
only).
MARKER INDICATOR LAMPS
MARKER MODE
RECEIVE AUDIO SELECTORS
CREW ICS VOLUME (INNER)
PASS ICS VOLUME (OUTER)
IINTERCOM MODE
TRANSMIT SELECTORS
CREW ICS
CD MUTE CONTROL
SPEAKER CONTROL
PMA7000H
Figure 3-1 PMA7000H 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 and to the critical unswitched input. 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 PMA7000H 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 PMA7000H has an automatic selector mode. Audio from the selected transceiver is automatically 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 ensures the pilot
will always hear the audio from the transceiver he is transmitting on.