Communication Flashcards
What is the purpose of the ALT-NORM switch on the ACP?
The NORM position allows the ACP to
operate normally.
In the ALT (Alternate) position, the ACP operates in the degraded mode. (No aural alerts if both on alternate).
Hardwires ACP to on side VHF except ACP 3 which hardwires to VHF1.
The Push-to-Talk switch, when toggled, transmits on which transmitter?
The PTT switches on the control wheel or ACP are used to key the oxygen mask or boom microphone (as selected by the R/T and I/C switch), on the selected by ACP transmitter selector.
What does the SERVICE INTERPHONE switch on the Aft Overhead do?
When positioned to ON, allows maintenance or service personnel external jacks to connect to the
system.
What does the ATTEND button do?
It sounds a two-tone chime in the
Passenger Cabin and illuminates both pink Master Call Lights
How can the Flight Deck alert the Ground Crew?
The Ground Call (GRD CALL) Switch, located on the overhead panel, sounds a horn in nose wheel well when pressed. The horn will sound until the switch is released.
What is the purpose of the VHF TEST switch on RTP?
Removes the automatic squelch feature, permitting reception of background noise and thereby testing receiver operation. It also improves the reception of weak signals.
What is the indication of tuning an offside Radio Tuning Panel (RTP)?
The Offside Tuning (white) Light, when illuminated, indicates the radio normally associated with this panel is being tuned by another radio tuning panel, or the radio tuning panel is being used to tune a radio not normally associated with this radio tuning panel.
What failure messages could display on the RTPs, and what do they mean?
The FAIL FAIL indication is displayed when the selected radio has failed.
NOTE: The selected frequencies may continue to be displayed in the Frequency Indicator when the radio is not available.
PANEL FAIL is displayed when the Radio Tuning Panel has failed.
What considerations should be made before keying the HF radio on the ground?
Do not key the HF Radio while the aircraft is being fueled/defueled. Injury to personnel or fire may result.
Ensure that personnel stay a minimum of 10 ft from the vertical stabilizer when the HF system transmits. RF energy from the antenna can cause injuries to personnel.
Does the hand microphone on the Aft Electronics Panel require the ACP to be tuned before making a PA to the cabin?
The Flight Deck PA Hand Microphone is stowed at the aft end of the center electronics panel on the PA Hand Microphone Clip and is plugged into
the PA Hand Microphone jack. The PA Hand Microphone jack bypasses the ACP
Flight Deck PA’s preempt Cabin PA’s and music
Why must a SELCAL light be reset?
The SELCAL system allows a ground station, with tone transmitting equipment, to call a specific aircraft.
The Reset Switch (when pressed) extinguishes and resets the SELCAL light. No other calls may be received until the channel is reset.
Which ACP is used to control the cabin MEDLINK headset jacks?
The MEDLINK headset jacks are controlled by the observer’s Audio Control Panel.
What is the priority of source selection for ACARS in the data mode?
• VHF is the most commonly used and least expensive mode. Transmission requires
line-of-sight and is not available beyond approximately 150-200 nm from the ground
station or over long expanses of ocean.
• SATCOM mode is automatically selected if VHF mode is not available (ETOPS, SATCOM installed).
• HF mode is automatically selected if VHF or SATCOM modes are not available (ETOPS,
SATCOM inop or not installed).
