PS Engineering
PCD7100 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
A
LL
:
(Middle Position): All parties will hear the aircraft radio, CD music and intercom. During any radio
or intercom communications, the music volume automatically decreases (unless the mute is inhibited). The
music volume will gradually return 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 aircraft radios. They may also listen to CD music. Passengers can continue to communicate with
themselves without interrupting the Crew and also may listen to Entertainment 2. Entertainment 2 may be
connected to the CD player during installation if so desired.
3.3.4.1 Soft Mute and Soft Mute inhibit
The Soft Mute feature assures that the aircraft radio transmissions will not be missed due to entertainment
playing. When there is radio reception or intercom conversation, the music level is dropped to a low, or
background level. When the radio or intercom traffic ceases, the level gradually returns to normal.
The front panel “MUTE” switch controls muting of the CD player. Pushing the music volume knob places
the ICS in Karoake (or sing along) mode, which inhibits the soft mute feature. This allows the music to
continue uninterrupted by intercom or radio traffic when cockpit workload is appropriate. Pushing the knob
again will release the mute inhibit function.
Table 3-2 Intercom Modes
Mode
Pilot Hears
Copilot Hears
Passenger Hears
Comments
Isolate
A/C Radios
Pilot Sidetone (during
radio transmission) CD
is Muted
Copilot and passenger
intercom
CD player
Passenger and Copilot
intercom
CD Player
This mode allows the pilot
to communicate without
the others bothered by the
conversations. Copilot and
passengers can continue
to communicate and listen
to music
All
Pilot
Copilot
A/C Radio
Passengers
CD player
Copilot
Pilot
A/C Radio
Passengers
CD player
Passengers
Pilot
Copilot
A/C Radio
CD player
This mode allows all on
board to hear radio recep-
tion as well as communi-
cate on the intercom. Mu-
sic is muted during
intercom and radio com-
munications
Crew
Pilot
Copilot
A/C Radio
CD Player
Copilot
Pilot
A/C Radio
CD Player
Passengers
Entertainment #2*
This mode allows the pilot
and copilot to concentrate
on flying, while the pas-
sengers can communicate
amongst themselves. Two
separate music inputs are
possible.
3.3.4.2 Secondary Entertainment Input
The PCD7100 has provisions for an additional entertainment input. The primary music volume control
does not affect secondary music level.
While in the C
REW
mode, pilot and copilot will hear entertainment input #1 while the passengers may lis-
ten to entertainment input #2.
It is also possible to use only one entertainment input device for both entertainment inputs. It is suggested
however, that a switch (DPDT) is installed between the single entertainment device and entertainment in-
put #1. This will allow the passengers to play the CD while in the Crew mode.
200-971-0005
Page 3-3
Rev. 5, Dec. 2002
