PS Engineering PMA7000B Operations Instructions download pdf (Page 6)

PMA7000B Pilot Guide

202-780-0001 R6

lose one channel, unless they switch to the “MONO” mode on the headset.

PS Engineering modifies headsets to add stereo capability, using high-

fidelity speakers. Contact factory for details.

Intercom Modes

The lower switch on the left side is a 3-position mode switch that allows

the pilot to tailor the intercom function to best meet the current cockpit

situation. The description of the intercom mode function is valid only when

the unit is not in the "Split" mode. Then, the pilot and copilot intercom is

controlled with the ICS button.

SO: (Up Position): The pilot is isolated from the intercom and is connected

only to the aircraft radio system. He will hear the aircraft radio reception

(and sidetone during radio transmissions). Copilot will

hear passengers’ intercom and Entertainment 1, while

passengers will hear copilot intercom and Entertain-

ment 2. Neither will hear aircraft radio receptions or

pilot transmissions.

LL: (Middle Position): All parties will hear the air-

craft radio and intercom. Crew will hear Entertainment

1, passengers will hear Entertainment 2. During any

radio or intercom communications, the music volume automatically de-

creases. The music volume increases gradually back to the original level

after communications have been completed.

REW (Down Position): Pilot and copilot are connected on one intercom

channel and have exclusive access to the aircraft radios. They may also

listen to Entertainment 1. Passengers can continue to communicate with

themselves without interrupting the Crew and also may listen to Entertain-

ment 2.

Anytime the PMA7000B is in either the Split Mode ("C

OM 1/COM 2, COM

1/C

OM 3"), the pilot and copilot intercom is controlled with the ICS button.

The passengers will maintain intercommunications, but never hear aircraft

radios.

Alternate Intercom Mode

If an external switch is installed for the purpose, the PMA7000B can enter

“Alternate Intercom Mode.” When the intercom is in ALL mode, with al-

ternate mode enabled the passengers will NOT hear the aircraft radios, but

they will hear the crew on the intercom. In addition, the crew microphones

will be blocked from the crew headsets while the radio audio is active.

Entertainment Input

The audio selector panel has provisions for two separate entertainment in-

put devices. Music 1 feeds the pilot and copilot positions, music 2 feeds the

passenger positions. They operate independently in the PMA7000B.

While in the ISO (Isolate) mode, the copilot will hear Entertainment 1

1 2 3 4 5 6 7 8 9 10 11 12

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PS Engineering PMA7000B Operations Instructions Page 6

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