SYS 204 - Comm Systems

Question 1

What four pieces of information does the RMU allow you to control?

Answer 1

UHF
VHF
Transponder
VHF Nav

Question 2

Does the VHF radio have the ability to monitor Guard and use other frequencies?

Answer 2

No

Question 3

What is the Guard Freq, UHF and VHF

Answer 3

121.5 and 243.0

Question 4

Where are the UHF antennas located?

Answer 4

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

Question 5

What component on the T-6 automatically switches between the dedicated UHF antenna and the lower UHF/VHF antenna?

Answer 5

Antenna Selector Switch

Question 6

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?

Answer 6

20 seconds

Question 7

How do you know when SQUELCH is disabled?

Answer 7

SQ appears on the lower right corner of the UHF field

Question 8

How many pre-sets are allowed to be stored for UHF and VHF on the RMU?

Answer 8

20

Question 9

How many VHF nav presets are there?

Answer 9

10

Question 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?

Answer 10

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

Question 11

How many channels can be stored in the standby UHF?

Answer 11

20

Question 12

On the standby UHF, what does MN mean?

What does MN GD mean?

Answer 12

MN - Main Mode, you transmit and receive only on the selected frequency
MN GD - Both, you monitor both GUARD and your selected frequency.

Question 13

With the standby UHF on MN GD, what should you be cautious of if someone transmits on Gaurd?

Answer 13

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.

Question 14

Where is the ground crew interphone headphone jack located?

Answer 14

On the left fuselage below the avionics bay

Question 15

If you select ALTN mode on the bypass switch, what two forms of communication become available?

Answer 15

Interphone Comm

VHF radio comm

Question 16

What kind of communication do the UHF/VHF radios provide?

Answer 16

Air-to-ground, air-to-air

Question 17

Where are the UHF/VHF control units located?

Answer 17

Left (UHF) & right (VHF) avionics bays aft of ckpt

Question 18

How do you change the channel mode on the backup UHF?

Answer 18

Push red CHAN button

Question 19

What is the difference between the RMU transfer and mode switches?

Answer 19

Transfer = diamond, Mode = rectangle

Question 20

T/F: The mode key in Nav field functions like a transfer switch in practice.

Answer 20

True

Question 21

What happens if all system pass the RMU preflight test?

Answer 21

RMU displays test page for 5 sec, then automatically returns to normal operating page 🡪 leave early by hitting RETURN

Question 22

How many additional transponder codes for quick recall does the RMU store?

Answer 22

1, typically 0377 for KSPS

Question 23

When does IDT not work?

Answer 23

When transponder in STBY mode

Question 24

When you press IDT, how long will you shown an ident flash to ATC for?

Answer 24

20 seconds

Question 25

Pressing the PUSH TONE button on the standby UHF does what?

Answer 25

Generates a 1kHz ton on the selected frequency

Question 26

Both the FCP and RCP have a standby UHF unit (T/F)

Answer 26

False, only the FCP