SCCS Flashcards
What is the purpose of the Headset Electronic Units (HEU) fitted in the Secure Communications Control System (SCCS)?
To convert audio signals between analogue and digital fibre-optic data formats
What is the purpose of the Headset Electronics Unit (HEU)?
To provide the interface between crew headsets and the Secure Communications Control System (SCCS)
Why are there two Signal Conversion Interface Units (SCIU) within the Secure Communications Control System (SCCS)?
One for interfacing with the secure devices and one for interfacing with clear devices
What is the purpose of the Emergency Intercom and Radio Amplifier (EIRA)?
To provide a backup communications system in the event of a significant Secure Communications Control System (SCCS) failure
What is the purpose of the VOX rotary switch?
The VOX adjusts the sensitivity level of the selected microphone
What crew separation does NET 2 provide?
Two isolated intercom nets, one for cockpit and rear bay, and one for cabin plus aircrewman/senior passenger
What happens when the PTT/CALL switch is toggled to the CALL position on the Communication Control Panel (CCP)?
The calling station is able to broadcast to all stations simultaneously on intercom regardless of NET switch position
What does the following annunciator signify? (3 horizontal green line on black)
Communications system enabled for transmission
When would the “Buddy mode” function be used by the Secure Communication Control System (SCCS)?
If a particular Communication Control Panel (CCP) has failed, control for the failed station can be achieved via an associated buddy station
How many predetermined intercom nets are available for selection on the Secure Communication Control System (SCCS)?
Three
Why may it take up to 3 seconds for the radio SEC annunciator to illuminate on the Secure Communication Control System (SCCS) when a radio is selected into secure mode?
Time delay due to the response from the associated KY-100
When conducting a lamp test what annunciator reaction can be expected on a Communication Control Panel (CCP) major station?
All annunciators except REV are illuminated for 3 seconds and then are extinguished for 3 seconds before reverting to the configuration prior to the lamp test
What are the failure modes of the Secure Communications Control System (SCCS)?
Buddy mode, reversionary mode, stand-alone mode
