PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0008 Page 3-5 Rev. 8, June 2003
3.7.2 Volume Control (3)
The volume control is a concentric knob. The inner knob adjusts the loudness of the intercom for the pilot
(in single panel installation) and the outer knob controls copilot and passenger volume. It has no effect on
selected radio levels or music input levels.
In dual installation, the inner knob controls the main volume (the person connected to the audio panel) and
the outer knob controls the passengers.
3.7.3 Intercom Modes (5)
The lower switch on the left side of the audio panel is a 3-position mode switch that allows the crew to
tailor the intercom function to best meet the current cockpit situation.
3.7.3.1 Single Installation Intercom Modes
I
SO: (Up Position): The pilot connected to the PAC24 is isolated from the intercom and is connected only
to the aircraft radio system. He will hear the selected aircraft radio reception (and sidetone during radio
transmissions). The copilot will hear passengers’ intercom and entertainment, while passengers will hear
copilot, intercom and entertainment.
A
LL: (Middle Position): All parties will hear the aircraft radio and intercom. All will hear entertainment.
During any radio or intercom communications, the music volume automatically decreases. The music vol-
ume increases gradually back to the original level after communications have been completed.
C
REW (Down Position): Pilot copilot and passengers are connected on one intercom channel and have ac-
cess to the selected aircraft radios. They may also listen to Entertainment.
3.7.3.2 Dual Installation Intercom Modes
I
SO: (Up Position): The primary pilot connected to the PAC24 is isolated from the intercom and is con-
nected only to the aircraft radio system. He will hear the selected aircraft radio reception (and sidetone dur-
ing radio transmissions). The crewmember on the other audio panel will hear locally selected radio audio,
passengers’ intercom and entertainment, while passengers will hear the radio, intercom and entertainment.
A
LL: (Middle Position): All parties will hear the aircraft radio and intercom. All will hear entertainment.
During any radio or intercom communications, the music volume automatically decreases. The music vol-
ume increases gradually back to the original level after communications have been completed.
C
REW (Down Position): Pilot and copilot are connected on one intercom channel and have exclusive ac-
cess to the locally selected aircraft radios. They may also listen to Entertainment. Passengers can continue
to communicate with themselves without interrupting the Crew and also may listen to Entertainment.
3.7.3.3 Observer Installation ISO Modes
If the observer’s panel is placed ISO, only the observer is isolated. CREW and ALL settings make no dif-
ference on the observer panel.
3.7.4 Entertainment Input
The audio selector panel has provisions for one entertainment input device in each audio panel. The vol-
ume control does not affect music level.
Anytime a person speaks on the intercom, or there is radio traffic, the music will be muted. It will return
gradually, through the use of SoftMute™ circuitry.
The SoftMute™ can be defeated for a “Karaoke Mode” (music does not mute) by pressing the NAV1 and
NAV2 buttons simultaneously for at least 3 seconds. Pressing the buttons again will reactivate SoftMute™.
While in the ISO (Isolate) mode, the non-isolated crewmember and passengers will hear entertainment.
When in the A
LL mode, all persons will hear the entertainment source.
(41 pagine)
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