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ACOM/IFT CAT 1 > HF > Flashcards

Flashcards in HF Deck (43):
1

What is the function of the HF Radio Subsystem?

provide long-range secure and nonsecure voice and data communications;
enhance EAM injection by increasing redundancy;
back up the VLF TACAMO broadcast

2

Where is the HF 1 Antenna located?

wire antenna between the fuselage and vertical stabilizer

3

Where is the HF 2 Antenna located?

vertical fin on top aft section of vertical stabilizer

4

Where is the HF 3 Antenna located?

port wing tip probe

5

Where is the HF 4 Antenna located?

probe on top forward section of vertical stabilizer

6

Where is the HF 5 Antenna located?

starboard wing tip probe

7

What are the power requirements for the HF Antennae?

Passive

8

Where are the HF Radio Set Controls and how many are there?

HF 2-5 are in P30 Bays 2 & 3
HF 1 is on center aisle in flight deck

9

What are the power requirements for the HF Radio Set Controls?

9 VDC from respective R/T

10

What is the function of the HF Radio Set Controls?

provide serial, digital, remote control of the radio set and display faults and operational status

11

How many preset channels are available on the HF Radio Set Control and what are they?

30 presets
channels 00-29

12

How many possible channels can be accessed manually and what is the frequency range?

280,000 channels spaced at 100 Hz increments
from 2.0000 to 29.9999 MHz

13

What are the modes available on the HF Radio Set Control MODE Thumbwheel Selector?

Upper Sideband Voice (UV); Upper Sideband Data (UD); Lower Sideband Voice (LV); Lower Sideband Data (LD); Amplitude Modulation Equivalent (AM); Preset (P); Unidentified (A); Continuous Wave (CW)

14

A frequency selection below ____ will cause a CONT FAULT indication.

2.0000 MHz

15

Where is the HF FAULT/TUNE Panel located?

P30 Bay 3

16

What are the power requirements for the HF FAULT/TUNE Panel?

28 VDC from MISC CONT c/b on P 30 DISTR 2

17

What is the function of the HF FAULT/TUNE Panel?

provide remote monitoring of the fault status of each HF radio; allow disabling of auto-retuning function

18

Where is the HF Preselector Bandpass Filter located?

HF 2-5 = E43 Bay 1
HF-1 = E45, fwd lower lobe

19

What are the power requirements for the HF Preselector Bandpass Filter?

115 VAC 400 Hz from respective R/T
28 VDC from internal power supply of respective R/T

20

What is the function of the HF Preselector Bandpass Filter?

provide filtering for circuits and offer additional selectivity to receiver during reception and to Power Amplifier (PA) during transmission

21

Where is the HF Power Monitor Panel located?

P30 Bay 3; above second HF Radio Set Control

22

What are the power requirements for the HF Power Monitor Panel?

Passive

23

What is the function of the HF Power Monitor Panel?

to allow measurement of the forward (F) and reflected (R) power output of the HF-3, 4, & 5 R/Ts

24

Where are the HF R/Ts located?

HF 2-5 = E43 Bay 1
HF 1 = E45 cabinet, fwd lower lobe

25

What are the power requirements for the HF R/Ts?

HF 2-5 = 115 VAC 400 Hz from P67-2 via MDF
HF 1 = 115 VAC 400 Hz from HF No. 1 c/b on P5

26

What is the function of the HF R/Ts?

convert audio signals into RF signals for transmission;
convert received RF signals into audio signals during reception

27

What is the output of the HF Power Amplifier (PA)?

400 W

28

Where is the HF SIMOP Bandpass Filter located?

HF 1 = E45, fwd lower lobe;
HF 2 = E43 Bay 1; HF 3 = E43 Bay 4;
HF 4 = E43 Bay 2; HF 5 = E43 Bay 4

29

What are the power requirements for the HF SIMOP Bandpass Filters?

115 VAC 400 Hz from MDF

30

What is the function of the HF SIMOP Bandpass Filters?

provide highly selective filtering for tx and rx signals to reduce broadband noise and allow SIMOP of the HF radios; provide impedance matching between antenna & HF R/T

31

Where is the HF Keyline Control Panel located?

P30 Bay 2

32

What are the power requirements for the HF Keyline Control Panel?

Passive

33

What is the function of the HF Keyline Control Panel?

allow keying of HF R/Ts 3-5; select PTT, constant keyline, or disabled keyline

34

Where is the ANDVT BTU (TSEC 8) located?

rear of P30 Bay 2

35

What are the power requirements for the ANDVT BTU (TSEC 8)?

28 VDC from SECURE VOICE TSEC 8 c/b on P30 DISTR 2

36

What is the function of the ANDVT BTU (TSEC 8)?

voice processing, coding, and MODEM function;
enable HF 3, 4, & 5 to tx & rx secure voice communications

37

Where is the ANDVT Split Remote Control Unit (RCU) located?

P30 Bay 3; above HF Power Monitor Panel

38

What are the power requirements for the ANDVT Split RCU?

28 VDC from SECURE VOICE TSEC 8 c/b on P30 DISTR 2

39

What is the function of the ANDVT Split RCU?

allow remote operation of the ANDVT and provide an indication of its operating status

40

Where are the Antenna Couplers with Lightning Arresters located?

port and stbd wing tip pods
tail fin assembly, adjacent to the HF antennae

41

What are the power requirements for the Antenna Couplers with Lightning Arresters?

Passive

42

What is the function of the Antenna Couplers?

to provide an impedance match between the antenna and the R/T

43

What is the function of the Lightning Arresters?

to provide electrical surge protection to the HF Radio Subsystem