Correct Answer Only

Front 1

#01. If the tech order states a transmitter has a frequency accuracy of 0.0001 percent, which of the following is an acceptable output with an operating frequency of 225 MHz?

Back 1

224.999975 to 225.000225

Front 2

#02. If an oscilloscope display a modulation envelope having an Emax of 200 volts and an Emin of 20 volts, what is the percent of modulation

Back 2

81.8

Front 3

#03. Reducing modulation to less than 100 percent gives

Back 3

no reduction in carrier power

Front 4

#04. In the AN/GRT-21 and AN/GRT-22, what circuit sets the audio-frequency response?

Back 4

Filter circuit in the A4 module

Front 5

#05*. In the AN/GRT-22 transmitter, the purpose of the E/L relay when operating in the 50-watt mode is to

Back 5

Bypass the LPA in the event of high VSWR

Front 6

#06*. Comparing the AN/GRT-21 and AN/GRT-22, the UHF multiplier module possesses one more stage of amplification than the VHF multiplier because the

Back 6

fourth harmonic is weaker than the second harmonic

Front 7

#07. Referring to foldout 6, if the 50-watt output decreases,

Back 7

conduction of Q3 increases, which causes a more positive APC voltage

Front 8

#08. Referring to the tuned cavity in foldout 9, C1 and C2 are tuned to pass what signals?

Back 8

Operating frequency only

Front 9

#09. In foldout 9, what is the purpose of the tuned cavity's low-pass filter (FL2)

Back 9

Attenuates harmonics

Front 10

#10*. The LPA FWD and RVS pwr sensor voltages are amplified and level-shifted in teh LPA A5 module for what purpose?

Back 10

To develop the APC voltage and to detect VSWR

Front 11

#11. In a receiver, why can the antenna not be connected directly to the mixer circuit?

Back 11

the oscillator signal mught be radiated out into space

Front 12

#12. Which of the following statements is true concerning rx operation?

Back 12

When we change fx's, the IF does not change; local oscillator frequency does

Front 13

#13. In what section of a superheterodyne rx does most of the amplification take place

Back 13

IF section

Front 14

#14. With an operating frequency of 150 MHz and an IF of 10.7 MHz, which of the following is a possible image freq.

Back 14

171.4 (? check this answer)

Front 15

#15*. What are the basic requirements for any type of demodulation?

Back 15

Sensitivity, nonlinearity, RF carrier signal, and filtering

Front 16

#17. Which module of an AN/FRR-=24 rx prevents interference from radar pulses?

Back 16

Noise limiter

Front 17

#16*. Which of the following statments is true concerning diode detectors?

Back 17

They give high-fidelity detection for signals of sufficient

Front 18

#18. The purpose of the AGC voltage is to

Back 18

ensure a constant output level with varying input signal strength

Front 19

#19. In the AN/GRR-24 mixer/multiplier in foldout 12, what frequency is C12 tuned to pass.

Back 19

Fourth harmonic of the oscillator input frequency

Front 20

#20*. In the AN/GRR-24 mixer/miltiplier in foldout 12, the output of Q8 is tuned to pass what frequency?

Back 20

Intermediate frequency

Front 21

#21*. Which of the following statements best identifies teh requirments for two transceivers to establesh HAVE QUICK communications?

Back 21

They must have the same WOD and TOD

Front 22

#22. Concerning HAVE QUICK 2 communications (MWOD), how long can each WOD be used?

Back 22

24 hours

Front 23

#23. What is the purpose of the tactical digital information link?

Back 23

The exchange of real-time tactical data

Front 24

#24. In foldout 15, grid B6, what functions are performed by the A7 modul's low-pass filter?

Back 24

Image-frequency rejection in rx and harmonic attenuation in tx

Front 25

#25*. Which of the following identifies the output power of the AN/GRC-171b4 tranceiver

Back 25

20 watts in AM, 50 watts in FM

Front 26

#26. Which of the following is resposible for proventing spurious RF outputs while the AN/GRC-171B(V)4 transceiver is changing frequincies during HAVE QUICK operation?

Back 26

A1A2 ECCM processor

Front 27

#27. In the AN/GRC-171B(V)4, what is the operating frequency of the guard receiver?

Back 27

243

Front 28

#28. On the AN/GRC-171B(V)4 radio set control, what condition causes the RT FLT lamp to illuminate

Back 28

A receiver-tx fault has been detected

Front 29

#29. During tx operation, what is the purpose of the compressor circuit in the RT-1446 HF transceiver?

Back 29

Equalizes varying voice levels so the audio signal is more uniform in amplitude

Front 30

#30. Referring to foldout 16, what determines which specific filter is used in the IF filter assembly?

Back 30

The mode of operation

Front 31

#31*. The purpose of the input overload protection circuit shown in foldout 16 to prevent

Back 31

any rx damage due to excessively strong signals

Front 32

#32. In foldout 16, which of the following best describes the output of the product detector shown in grid A5?

Back 32

The difference between teh second IF and the BFO signal, which is the audio

Front 33

#33. In figure 3-2, which circuit provides impedence matching between teh antenna and the AM-7223?

Back 33

A2 tank assembly

Front 34

#34. In the AM-7223 LPA, which circuit provides outputs that are directly proportional to the forward and reflected pwr.

Back 34

VSWR bridge

Front 35

#35. When using the C-11329 remote control unit, how do we route tx audio to the RT-1446?

Back 35

Using a 600-ohm transmission line

Front 36

#36*. The amount of skin-affect loss is directly proportional to

Back 36

signal frequency

Front 37

#37*. Leakage loss in a transmission line can be minimized by using a

Back 37

very-high-resistance dielectric

Front 38

#38*. What two properties of a transmission line determine its characteristic impedance?

Back 38

Inductance and capacitance

Front 39

#39*. Which of the following best describes "cutoff fx" when discussing transmission line properties?

Back 39

The frequency where Xc causes the signal to be shunted

Front 40

#40. Which of the following statements concerning wavelength is true?

Back 40

Wavelength is inversely related to fx

Front 41

#43. Which of the following statements concerning line lengths is true?

Back 41

With constant physical length, fx and electrical length are directly related

Front 42

#44*. A nonresonant transmission line is a line

Back 42

having no reflected waves

Front 43

#45. When discussing transmission lines,

Back 43

maximum power transfer results from a nonresonant line

Front 44

#46. If a transmission line is terminated in an open, which of the following will likely result?

Back 44

There would be significant signal loss

Front 45

#47. The pupose of a balun is to

Back 45

provide an impedance match between transmission line and antenna

Front 46

#48. Which of the following is the primary limiting factor concerning use of waveguides at lower frequencies?

Back 46

Physical size

Front 47

#49. Which of the following statements concerning waveguides is false?

Back 47

The flexible nature of waveguides makes them eay to install

Front 48

#50. Which of the following statements concerning waveguides is false?

Back 48

The flexible nature of waveguides makes them easy to install

Front 49

#51. The path above the horizon through which an antenna radiates the largest amount of its RF energy is called the

Back 49

radiation angle

Front 50

#52. If an antenn's electric lines of force lie in a vertical direction, it can be said that teh antenna is

Back 50

vertically polarized

Front 51

#53. An antenna that radiates well in all directions is said to be

Back 51

omnidirectional

Front 52

#54. If an antenna concentrates its signal in one direction while reducing the signal in other directions, it can be classified as

Back 52

directional

Front 53

#55*. Log-periodic antennas

Back 53

exhibit essentially constant characteristics over the entire frequency range

Front 54

#56. How many channels can be connected to the CU-547/GR antenna multicoupler?

Back 54

3