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- Two audio control panels
- Two maintenance interphone panels
AUDIO CONTROL PANELS (ACPs)
An audio control panel (ACP) is located on both sides of the instrument panel. The ACPs allow the pilots to monitor the
navigation radios, monitor and transmit on VHF and HF communication radios, the PA system and intercom system.
Receiver controls and volume adjustment for the intercom and radio are provided at each ACP. The output from each audio
control panel is directed to the associated headset jacks and speaker.
The aural warning system volume is not adjustable by the crew. Audio signals from the aural warning system, TAWS, and
TCAS do not go through the volume control switches.
Headphone audio is always available, with the volume control capability from any control switch.
SPKR
The SPKR audio selector enables the selected audio to be routed to the on-side crew speaker.
Warning audio can be heard with the switch in any position.
INPH
The INPH audio selector enables intercommunication between the crew positions in the cockpit and service
interphone positions external to the aircraft.
VOICE/ID/BOTH
The VOICE/ID/BOTH toggle switch is a three position toggle switch that allows the pilot to separate the audio when monitoring
the simulcast audio of a radio transmission. When the switch is selected to VOICE, the VOR, ILS, or ADF station
morse code identifier is filtered out, allowing only the voice signal to be audible. In the ID position, only NAV and ADF
identifier code will be heard. When BOTH is selected, the station morse code identifier and voice message are audible.
EMER/NORM
The EMER/NORM is a two position locking toggle switch. In the NORM position, the audio system operation is normal.
In the EMER position, the audio is routed directly to the headphones.
REV 1
COMMUNICATIONS
Volume 2 Flight Crew Operating Manual Sep 13/2004
06-01-02 CSP 100-6 REV 1
AUDIO CONTROL PANELS (ACPs) (Cont)
O2/MASK
The O2/MASK toggle switch is a two position switch. In the NORM position, the headphone boom microphone input is
active. In the O2 position, the oxygen mask microphone is active.
CONTROL WHEEL TX AND INPH SWITCHES
The pilot and copilot’s control wheels are equipped with TX/INPH momentary switches.
The TX position allows transmitting on the selected radio. The INPH position allows intercom transmissions when the interphone
is selected off on the ACP.
COM1 COM2 COM3 HF1 HF2 PA
CFO0601002_001
HDPH
1 DME 2 1 ADF 2 MKR INPH SPKR
1 NAV 2
VOICE EMER 02 MASK
BOTH NORM NORM
ID
CFO0601002_010
ID
INPH
TX
COMMUNICATIONS
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 06-01-03
RADIO AND INTERCOM SWITCHES AND HAND MICROPHONES
The control wheel radio/intercom switches at each pilot’s station and the hand microphones allow the pilots to transmit on
the communication radios or interphone.
HEADSET JACK PLUGS
Headset panels are available at the two flight deck positions to connect the headsets to the audio system.
CFO0601002_004 PILOT CONTROL WHEEL
(REAR VIEW)
COPILOT CONTROL WHEEL
(REAR VIEW)
RADIO AND
INTERCOM
SWITCH
RADIO AND
INTERCOM
SWITCH
CFO0601002_003
HDPH MIC
PILOT AND COPILOT HEADPHONE JACK PANEL
COMMUNICATIONS
Volume 2 Flight Crew Operating Manual May 06/2005
06-01-04 CSP 100-6 REV 2
HAND MICROPHONES
Hand microphones are mounted on the control columns at each of the pilot’s stations.
FLIGHT COMPARTMENT SPEAKERS
Two speakers are located overhead in the flight compartment. The speaker volume can be adjusted by rotating the SPKR
knob. The speaker can be selected off by pressing the SPKR knob in.
CFO0601002_002
FLIGHT COMPARTMENT LOUDSPEAKER (2)
V 2
COMMUNICATIONS
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 06-01-05
MAINTENANCE INTERPHONE PANELS
Two maintenance interphone panels are located in airplane to permit hot microphone communications to interface with the
flight compartment when selected on the flight deck audio control panel. A headphone and microphone jack are installed
at each location.
Microphone and headset jacks are installed at the following airplane locations:
- Left side of the aircraft in the nose compartment area (accessible behind the communication access door
- Left side of the aft equipment compartment
CFO0601002_011
MIC HDPH
AFT-COMPARTMENT
SERVICE-INTERPHONE UNIT
HDPH MIC
NOSE-COMPARTMENT
SERVICE-INTERPHONE UNIT
COMMUNICATIONS
Volume 2 Flight Crew Operating Manual Sep 13/2004
06-01-06 CSP 100-6 REV 1
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