Operating instructions

Page 8 202-890-0602 PMA8000MP3 Pilot Guide

copilot intercom is controlled with the Mute button.

This button cycles through the intercom modes, from top to bottom

and then back up, ISO, ALL, Crew, ALL, and ISO. An LED shows

the active mode .

SO: 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). The copilot and passengers will

hear the music sources as configured by the audio panel configuration

Function keys. See page 11—Smart Function Keys for more details.

LL: All parties will hear the aircraft radio and intercom. Crew will

hear Entertainment 1, passengers can hear Entertainment 1 or 2. Dur-

ing any radio or intercom communications, the music volume auto-

matically decreases. The music volume increases gradually back to

the original level after communications have been completed.

REW: Pilot and copilot are connected on one intercom channel and

have exclusive access to the aircraft radios. Again, the music that the

crew and passengers will hear is determined by the Smart Function

Keys.

Marker Beacon Operation (10)

The Marker Beacon Receiver uses visual and audio indicators to alert

you when the aircraft passes over a 75 MHz transmitter.

The Blue lamp, la-

beled “O”, is the

Outer Marker lamp

and has an associ-

ated 400-Hertz 'dash'

tone. The lamp and

tone will be keyed at

a rate of two tones/flashes per second when the aircraft is in the range

of the Outer Marker Beacon.

The Amber lamp, labeled “M”, is the Middle Marker lamp and is cou-

pled with a 1300 Hertz tone. It is keyed alternately with short 'dot' and

long 'dash' bursts at 95 combinations per minute.

The White lamp, labeled “I”, is the Inner marker and has a 3000 Hertz

'dot' tone. The lamp and tone will be keyed at a rate of six times per

second.

The audio from the Marker Beacon Receiver can be heard by select-