CH5 COMMUNICATIONS Flashcards
What does the MIC light indicate when illuminated?
The transmitter is selected
The MIC light is illuminated in green.
What happens to the MIC light for other transmitters when one is selected?
It extinguishes
Only one switch is normally selected at a time for each crew station.
What is the function of the CAB and SAT switches when selected at the same time?
Cabin to SATCOM conferencing
This allows communication between the cabin and SATCOM.
What occurs when the CAB transmitter select switch is pushed twice within one second?
Places a priority call to a selected cabin station
This is a specific function related to the cabin intercom system.
What does the second push of the CAB select switch do?
Deselects the transmitter and receiver audio
This action only occurs after one second has elapsed from the first push.
What does an illuminated CALL light indicate?
Indicates a call on SELCAL, FLT, CAB, or SATCOM
The CALL light is illuminated in white.
When does the CALL light reset?
When the respective transmitter select switch is pushed or by pressing a MIC/INTERPHONE switch
The SATCOM CALL light remains illuminated until the call ends.
What is a unique feature of the PA system regarding CALL lights?
PA does not have a CALL light
This differentiates the PA system from others like SELCAL and interphones.
Fill in the blank: The MIC light illuminates when the transmitter is _______.
selected
True or False: Only one transmitter can be selected at a time for each crew station.
True
What color is the CALL light when indicating a call?
White
What is the effect of deselecting the transmitter with the CAB switch?
Deselects receiver audio
This is part of the second push function.
What does the MIC/Interphone Switch do?
Keys the boom microphone or oxygen mask on the selected radio transmitter or other system
The MIC switch activates the microphone for communication, while the INT position allows intercom functionality.
What is the function of the Center position on the MIC/Interphone Switch?
Off position (spring-loaded to center)
This position does not activate any audio transmission.
What does the INT position on the MIC/Interphone Switch do?
Keys the boom microphone or oxygen mask on the flight interphone
This allows communication within the aircraft among crew members.
What are the available options for the VOR Receiver Selector?
- VOR L - left VOR and DME
- VOR R - right VOR and DME
- ADF L - (inop)
- ADF R - (inop)
The ADF options are inoperative, meaning they cannot be selected for navigation.
What happens when the PA Mic Switch is pushed and held?
- The MIC light for any other transmitter extinguishes
- Keys passenger address announcement from this station to all PA areas
This ensures that the PA announcement takes priority over other audio signals.
What does an illuminated (green) Receiver Light indicate?
The respective receiver volume control is manually selected on
This visual cue helps the crew to verify which audio sources are active.
How does the Receiver Volume Control function?
- Push - turns the respective receiver audio on or off
- Rotate - controls receiver volume
This allows for easy management of audio levels during operation.
What is required to turn the CAB receiver audio on or off?
The CAB transmitter select switch has to be selected on an ACP
This ensures that the cabin audio system is properly configured to receive or transmit audio.
What does the Speaker (SPKR) Volume Control do?
Controls communication audio volume in the flight deck speaker
Push - adds or removes communication audio; Rotate - adjusts volume
What are the options available for the Approach (APP) Receiver Selector?
Selects the approach receiver to be monitored:
* APP L - left ILS/GLS and DME
* APP R - right ILS/GLS and DME
* MR - marker beacon
These options allow pilots to monitor different navigation aids
What does the Navigation Filter Selector do?
Filters VOR, ILS, or DME audio
Options: V (voice), B (both), R (range)
What audio is available in all positions of the Navigation Filter Selector?
Marker beacon audio
This audio is accessible regardless of the selected filter