
PS Engineering
PAC45J Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-045-2000
Page 2-11
November 2020
SWITCH
NUMBER
FUNCTION
ON
OFF
J452-34 IS COM 8
AUDIO INPUT
35
PA SIDETONE
SIDETONE FROM EXTERNAL
PA IS ACTIVE
LOCAL SIDETONE FOR
EXTERNAL PA
36
UNSWITCHED 1 & 2
SPLIT
UNSWITCHED #1 IS NOT
PROVIDED TO COPILOT
UNSWITCHED #2 IS NOT
PROVIDED TO PILOT
UNSWITCHED #1 AND 2
PROVIDED TO BOTH
CREWMEMBERS
37
UNSWITCHED TO
OBSERVER
UNSWITCHED AUDIO
PROVIDED TO OBSERVER
POSITIONS
NO UNSWITCHED
AUDIO AT OBSERVER
POSITIONS
38
STEREO OBSERVER
OBSERVER POSITIONS ARE
STEREO (LEFT & RIGHT
CHANNELS ACTIVE)
OBSERVER POSITIONS
ARE MONO (LEFT
OUTPUT)
39
STEREO CREW
CREW POSITIONS ARE
STEREO (LEFT & RIGHT
CHANNELS ACTIVE)
CREW POSITIONS ARE
MONO (LEFT OUTPUT)
40
8Ω HEADSETS
AUDIO OUTPUTS
COMPATIBLE WITH LOW
IMPEDANCE HEADPHONES
AUDIO OUTPUTS
COMPATIBLE WITH
HIGH IMPEDANCE
(150Ω TO 300Ω)
HEADPHONES
41
RECEIVER INDICATION
INDICATOR BLINKS WHEN
AUDIO SIGNAL IS PRESENT
ON A SELECTED RECEIVER
NO RECEIVER
INDICATION
42
MUSIC MUTE
MUSIC WILL MUTE WHEN
RADIO OR INTERCOM IS
ACTIVE
MUSIC MUTES ONLY
WHEN RADIO IS ACTIVE
43
COPILOT MUSIC ENABLE
COPILOT POSITION CAN
HEAR MUSIC
COPILOT POSITION
WILL NEVER HEAR
MUSIC
44
OBSERVER 1 MUSIC
ENABLE
OBSERVER 1 POSITION CAN
HEAR MUSIC
OBSERVER 1 WILL
NEVER HEAR MUSIC
45
OBSERVER 2 MUSIC
ENABLE
OBSERVER 2 POSITION CAN
HEAR MUSIC
OBSERVER 2 WILL
NEVER HEAR MUSIC
46
ALERTS ON SPEAKER
AURAL ALERT AUDIO IS
PRESENTED ON COCKPIT
SPEAKER
AURAL ALERT AUDIO IS
NOT
PRESENTED ON
COCKPIT SPEAKER
47
BACKLIGHT VOLTAGE
ON FOR 28VDC
OFF FOR 14 OR 5 VDC
48
BACKLIGHT VOLTAGE
ON FOR 28 OR 14 VDC
OFF FOR 5 VDC