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PS Engineering

PMA7000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

200-780-0005 Page 3-1 Rev. 11, February 2015

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 SELECTORS

CREW ICS VOLUME (INNER)

PASS ICS VOLUME (OUTER)

IINTERCOM MODE

TRANSMIT SELECTORS

CREW ICS

MUSIC 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 automatical-

ly heard in the headsets and speaker (if selected). You can check this function by switching from COM 1 to

COM 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.

When switching from COM 1 to COM 2, while COM 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.

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PS Engineering PMA7000B Specifiche Pagina 20