PS Engineering PAC24 Operations Instructions download pdf (Page 9)

Revision 4, April 2009 Page 9 PAC24-Series Pilot Guide

Entertainment Input

The audio selector panel has provisions for one entertainment input de-

vice in each audio panel. The volume 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 Soft-

Mute™ 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 pas-

sengers will hear entertainment. When in the A

LL mode, all persons

will hear the entertainment source.

Music Off

“Music Off mode” may be selected in cases where a music input is not

connected, or in use, but audio noise can be heard due to other loads or

cross-talk in the system.

Music can be inhibited completely by pressing NAV1 and AUX

(ADF in –0500) for at least 3 seconds.

Music Off will override karaoke mode

Telephone Mode

The Com 5 mode can serve as a full duplex interface for telephone sys-

tems if the installation is correctly configured. When interfaced with an

approved airborne telecommunications system, the PAC24 can serve as

an audio control and distribution center. The crewmember’s telephone

access is the "Com 5" button on the audio panel. When Com 5 is active

in the duplex mode, the TX button will blink about twice as fast as the

normal transmit rate.

When the intercom is in ALL mode, the pilot can speak on the phone

only

if the Com 5 is selected for transmit (Com 5 XMT button acti-

vated). All intercom positions will hear the telephone conversation. All

will hear selected audio. Com 1 audio is automatically heard in the

headsets. The pilot and copilot will have transmit capability on the

other selected transceiver, simply by using their respective PTT switch.

In CREW mode, the pilot and copilot are may use the telephone, with

their respective hook switch (the pilot selects Com 5 on the Xmt selec-

tor). Any passenger who places their switch into the off-hook position

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PS Engineering PAC24 Operations Instructions Page 9