SY204 Communication Systems Flashcards Preview

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Flashcards in SY204 Communication Systems Deck (18)
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0
Q

What are two conditions when the Backup UHF control unit should be used?

A

Failure of the RMU

Failure of the battery bus

1
Q

The UHF COMM unit is located in the _______ avionics bay and the VHF COMM unit is located in the ______ avionics bay

A

Left

Right

2
Q

UHF radio range is from _______ to ________ megahertz

A

225.00 to 399.975 (7000 channels)

3
Q

The backup UHF radio has ___ preset channels

A

20

4
Q

Where are the UHF and VHF antennas located?

A

One UHF antenna on top mounted on the upper fuselage aft of the canopy
One VHF/UHF communications antenna on the lower fuselage in front of the tail fin

5
Q

What is the difference between HOT and COLD mode on the INTPH switch?

A

In HOT mode, both microphones are active. (Pressing the ICS KEY/MUTE switch on either PCL will mute all external incoming audio.)

In COLD mode, either the ICS KEY switch or the ICS KEY/MUTE switch on either PCL will activate the interphone. (The KEY/MUTE switch also mutes external incoming audio and key ICS.)

6
Q

How is power supplied to the ground crew interphone?

A

Battery switch (in either cockpit)

7
Q

What is the purpose of the ALTN position switch on the audio control panel?

A

Moving the switch to ALTN bypasses the amplifier and provides raw audio for UHF comm and aural warnings (also causes the intercom system to become inoperative)

8
Q

Power to the RMU is provided through the __________ bus

A

generator

9
Q

What indication is given when the RMU is on the preflight test page?

A

The letters “PFT” are shown in the top field.

10
Q

VHF NAV memory will store a maximum of ___ preset channels

A

10

11
Q

To DME hold, press the ______ key.

A

DMEH

12
Q

What are the 3 modes of the Transponder?

A

STBY, ON, ALT

13
Q

When in BOTH mode, the UHF radio will __________.

A

monitor Guard and the active frequency and transmit on the active frequency

14
Q

The RMU preflight test is initiated by ________.

A

applying power to the RMU

15
Q

What indication do you see when the squelch is off?

A

The letters “SQ” are displayed

16
Q

What indication will you get on the RMU if the backup UHF radio control unit is in operation?

A

The word “REMOTE” will be displayed.

17
Q

The INTPH switch is located in which cockpits?

A

AFT cockpit only

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