Comm System Flashcards
How many preset channels are allowed on the UHF backup control unit?
20
Where is the UHF backup control unit located?
Center console in the front cockpit only
What are the two interphone modes?
HOT and COLD
When in HOT mode, both microphones are what?
Active
Where is the ground interphone headset jack located?
On the left fuselage, below the avionics bay
How do you adjust VHF radio volume?
Rotate the VHF knob on the audio control panel
True or false: The audio control panel is located in the front cockpit only
False
What effect will moving the bypass switch to the ALTN position have on the UHF radio?
The audio will be unamplified, raw audio
What are the buttons on the left side of the RMU?
Field select buttons
What will you see when a field select key has been pressed?
A rectangular cursor will appear in the field
What are transfer switches on the RMU labeled with?
White diamond
Pulling out the small tuning knob will allow you to change UHF frequency in what increments?
25 kHz
What indication is given when the RMU is on the preflight test page?
PFT is shown in the top field
True or false: If the RMU passes the preflight it will display the preflight test page for 5 seconds, then return to the normal operating page
True
UHF radio information is displayed in what field on the RMU display?
First
How do you toggle between active and standby frequencies on the UHF radio?
Press the transfer switch adjacent to the UHF field
Pressing the MEM special function key will do what?
Display the last used memory channel in the standby frequency
What indication is shown on the RMU display when the UHF Guard is turned on?
The word Guard
How many VHF NAV presets can be stored in the RMU?
10
What does the DMEH button do?
Holds the current DME information while allowing use of another nav facility
With the transponder mode set to STBY, what information is being transmitted?
None
How many transponder codes can the RMU store in addition to the active code?
One
True or false: The VHF transceiver has a separate radio for monitoring VHF Guard
False
What is the UHF Guard frequency?
243.00
The UHF backup control unit is activated by what?
Turning the OFF/PUSH TEST knob clockwise
VHF NAV volume control is provided through what?
The NAV knob on the audio control panel
The ground crew interphone is activated by what?
When the battery switch in either cockpit is switched on
If the RMU does not pass the preflight test, you may override the system by doing what?
Pressing the key next to ACCEPT
What will the UHF radio do when in BOTH mode?
Monitor Guard and the active frequency and transmit on the active frequency
How is UHF radio direct tuning accomplished?
Holding down the appropriate transfer key for at least 3 seconds, then dialing in the new frequency
The RMU allows storage of up to how many UHF or VHF communication frequencies in memory channels?
20
What do you do to access the RMU special functions page for selected systems?
Press the PAGE special functions key
What is the RMU preflight test initiated by?
Applying power to the RMU
What indication do you see when squelch is turned off?
The letters “SQ” are displayed
What indication will you get on the RMU if the backup UHF radio control unit is in operation?
The word “REMOTE” will be displayed
What is the main operational difference between the UHF radio and VHF radio?
The VHF radio doesn’t monitor Guard frequency; you must dial it up manually
With the transponder set to ALT, what information is being transmitted
Aircraft altitude and transponder code
