Block 7 Unit 2

Question 1

This enables communication with ground troops and foreign and domestic civilian air traffic control

Answer 1

Very high frequency

Question 2

Purpose of very high frequency

Answer 2

Enables communication with ground troops and ATC
AM direction finding
FM homing

Question 3

What are the operating voltage is a VHF

Answer 3

28 VDC nominal

18 VDC Emergency 

Question 4

Modes of VHF

Answer 4

AM/FM Voice
Emergency AM/FM Voice
ADF
FM homing
Tone

Question 5

Output power of VHF

Answer 5

AM - 10 Watts

FM - 16 Watts

Question 6

What is the channel spacing of VHF

Answer 6

25 kHz

Question 7

Propagation method of VHF

Answer 7

Direct waves

Question 8

Frequency range of VHF

Answer 8

FM RX/TX : 30 - 87.975 MHz
AM RX : 108 - 117.975 MHz
AM RX/TX : 118 - 151.975 MHz

Question 9

Type of modulation of VHF

Answer 9

Amplitude modulation

frequency modulation

Question 10

Guard frequencies of VHF

Answer 10

FM - 40.5 MHz

AM - 121.5 MHz

Question 11

Duty cycle of VHF

Answer 11

1 min transmitting 5 minutes receiving

Question 12

What radio is used for VHF

Answer 12

Arc 186

Question 13

What serial control word controls the RT

Answer 13

32-bit serial control word

Question 14

Used with FM homing only and switches R/T receiver between two antennas to provide relative bearing to transmitting source

Answer 14

Signal data comparator

Question 15

Antennas of VHF

Answer 15

Upper lower AM FM voice 
Two FM homing wingtips 
1 ADF 
singleband antenna 
dual band antenna

Question 16

This module of the VHF contains antenna switching AM MODULATION transmitting receiving switching sides Stonegate voltage regulation on and off control and filtering

Answer 16

Transmitter A1

Question 17

This module provides the R/T with all required voltage from signal 24 VDC input provided from the A1 transmitter

Answer 17

Power supply A2

Question 18

This module has two functions and is used in audio switching filtering amplification and tone generation

Answer 18

Audio card A3

Question 19

This module has two sub parts in it

Answer 19

Receiver A4

Question 20

This receiver is where heterodyne takes place and wear the output is the intermediate frequency

Answer 20

RF receiver A4A2

Question 21

This receiver is where detection takes place and contains squelch circuits

Answer 21

IF receiver A4A1

Question 22

This module provides injection frequencies for the receiver transmitter and his where FM modulation takes place

Answer 22

Synthesizer A5

Question 23

This module receives the 32 bit serial data word from the RSC and is only used in remote

Answer 23

Serial receiver A8

Question 24

What is the operating power of VHF system

Answer 24

28 VDC aircraft power

Question 25

Where is AM modulation taken place in VHF system

Answer 25

Transmitter A1

Question 26

Where is FM modulation in the VHF system taking place

Answer 26

Synthesizer A5