Operating instructions

202-890-0402 Rev. 2 Page 13 Oct. 2010 PMA8000B Pilot Guide

There are two music sources available to the PMA8000B. Music 1

input can be either on the front jack, OR the Music 1 input at the rear

connector (Pins 23 and 24, J2). Music 2 is wired into the rear connec-

tor, only (Pins 26 and 27, J2)

The volume of the audio annunciations and recorder playback can be

adjusted through a hole on the top of the unit marked “ANN VOL.”

Function “A”

Function “A” controls the distribution of aircraft radio within the in-

tercom, as well as passenger intercom muting. In the “standard inter-

com function” mode, aircraft radios are distributed to all, when the

intercom is in the ALL mode. In CREW mode, only the pilot and co-

pilot positions will hear aircraft radios.

When Function A is toggled into “Alternate Intercom Function,” the

passengers will NOT hear aircraft radios, even in the All mode. In

addition, when in the ALL mode, passengers will be able to converse

with the crew. However, when the aircraft radio becomes active, the

intercom audio from the passengers is muted, allowing the crew to

focus on the radio. Passengers will be able to talk to each other.

Function “B”

Function Button “B” allows you to either send the music 1 input to all

intercom stations, all of the time, or have the normal rules apply to

our music inputs.

When “Music number one distribution, all headsets” is selected, mu-

sic 1 (from the unit’s rear connector input) will be distributed to all

Music 1

Passengers

Pilot & Copilot

Music Distribution ICS Dependent

ALL Mod e

Music 1

Passengers

Copilot

Pilot

Music Distribution Dependent

ISO Mode

Passengers

Pilot & Copilot

Music Distribution Dependent

CREW Mode

Music 2

Music 1

ICS

Pilot Selec table

Music Distribution Depends on Intercom Mode