SYS 204 - Comm Systems Flashcards
What four pieces of information does the RMU allow you to control?
UHF
VHF
Transponder
VHF Nav
Does the VHF radio have the ability to monitor Guard and use other frequencies?
No
What is the Guard Freq, UHF and VHF
121.5 and 243.0
Where are the UHF antennas located?
A dedicated UHF antenna is located on the top of the aircraft just aft of the canopy
A UHF/VHF antenna is located on the bottom of the fuselage
What component on the T-6 automatically switches between the dedicated UHF antenna and the lower UHF/VHF antenna?
Antenna Selector Switch
If you select a field in the RMU, how long will it take for it to switch back to the UHF field if you do not make any more inputs?
20 seconds
How do you know when SQUELCH is disabled?
SQ appears on the lower right corner of the UHF field
How many pre-sets are allowed to be stored for UHF and VHF on the RMU?
20
How many VHF nav presets are there?
10
If the RMU does not pass its pre-flight test, will the Pre-Flight Test page remain displayed?
If so, how do you exit the PFT page and override the failure?
Yes, the page will continue to be displayed
In order to exit the PFT page, you must first ACCEPT the failures, it will then go to the main page
How many channels can be stored in the standby UHF?
20
On the standby UHF, what does MN mean?
What does MN GD mean?
MN - Main Mode, you transmit and receive only on the selected frequency
MN GD - Both, you monitor both GUARD and your selected frequency.
With the standby UHF on MN GD, what should you be cautious of if someone transmits on Gaurd?
If you on both mode and someone transmits on Guard, and you go to transmit, you now will transmit on guard rather than the previous selected frequency.
Where is the ground crew interphone headphone jack located?
On the left fuselage below the avionics bay
If you select ALTN mode on the bypass switch, what two forms of communication become available?
Interphone Comm
VHF radio comm
What kind of communication do the UHF/VHF radios provide?
Air-to-ground, air-to-air
Where are the UHF/VHF control units located?
Left (UHF) & right (VHF) avionics bays aft of ckpt
How do you change the channel mode on the backup UHF?
Push red CHAN button
What is the difference between the RMU transfer and mode switches?
Transfer = diamond, Mode = rectangle
T/F: The mode key in Nav field functions like a transfer switch in practice.
True
What happens if all system pass the RMU preflight test?
RMU displays test page for 5 sec, then automatically returns to normal operating page 🡪 leave early by hitting RETURN
How many additional transponder codes for quick recall does the RMU store?
1, typically 0377 for KSPS
When does IDT not work?
When transponder in STBY mode
When you press IDT, how long will you shown an ident flash to ATC for?
20 seconds
Pressing the PUSH TONE button on the standby UHF does what?
Generates a 1kHz ton on the selected frequency
Both the FCP and RCP have a standby UHF unit (T/F)
False, only the FCP
