Volume 1 Unit 2 Flashcards
The frequency range of the AN/GRT−22 transmitter, in megahertz (MHz), is
a. 114.000 to 149.975.
b. 116.000 to 149.975.
c. 116.000 to 225.000.
d. 225.000 to 399.975.
225.000 to 399.975
In what AN/GRT−21/22 transmitter transmit mode should you connect the antenna to K1J3? a. 10-watt (W). b. 50-W. c. High power. d. Single sideband.
10-W
What AN/GRT−21/22 transmitter component eliminates unwanted harmonics generated in the A10 driver? a. Power detector, DC1. b. Low pass filter, FL1. c. Tunable filter, FL2. d. Multiplier, A9.
Tunable Filter
If the AN/GRT−21/22 transmitter power supply temperature is too high, the thermal
detector in the A7 module
a. develops voltage that enables the A2 module to create the +20 volts (V) alternating current
(AC).
b. sends a signal to the power detector, DC1, to enable keying.
c. creates the keyed +20 V direct current (DC).
d. develops the keyer inhibit voltage.
Develops key inhibit voltage
What type of multiplier does the AN/GRT−21 transmitter have?
a. Quadrupler.
b. Doubler.
c. Tripler.
d. None.
Doubler
The radio frequency (RF) power output of the CM–350 transmitter is
a. 120 volts (V) alternating current (AC).
b. 12 to 35 watts (W).
c. 2 to 35 W.
d. 2 to 12 W.
12 - 35W
Which receiver component determines the overall selectivity?
a. Intermediate frequency (IF) filter.
b. Radio frequency (RF) amplifier.
c. Image frequency filter.
d. IF amplifier.
Intermediate Frequency Filter
Diode detectors give
a. high-fidelity detection for signals of insufficient amplitude.
b. low-fidelity detection for signals of insufficient amplitude.
c. high-fidelity detection for signals of sufficient amplitude.
d. low-fidelity detection for signals of sufficient amplitude.
high-fidelity detection for signals of sufficient amplitude.
Both CM–300 series receivers can operate on
a. 24 volts (V) alternating current (AC) or 120 V direct current (DC).
b. 120 or 240 V AC or 24 V DC.
c. 120 V AC or 24 V DC.
d. 120 or 240 V AC.
120 V AC or 24 V DC
What is the transmit duty cycle for the AN/GRC–171 transceiver?
a. 1 minute transmit, 9 minutes receive.
b. 3 minutes transmit, 7 minutes receive.
c. 7 minutes transmit, 3 minutes receive.
d. 9 minutes transmit, 1 minute receive.
9 minutes transmit, 1 minute receive
What needs to happen in the CM–350 transceiver configuration antenna transfer relay
(ATR) switch in order to transmit?
a. The transmitter keys, then the ATR routes the transmit signal to the antenna.
b. The ATR routes the transmit signal to the antenna, then the transmitter keys.
c. The transmitter keys, then the ATR routes the receive signal to the antenna.
d. The ATR routes the receive signal to the antenna, then the transmitter keys
The ATR routes the transmit signal to the antenna, then the transmitter keys.
What type of antenna receives well in all directions but also allows interference from all directions? a. Bidirectional. b. Unidirectional. c. Omnidirectional. d. Vertically polarized.
Omnidirectional
A theoretically perfect radiator (antenna) that radiates equally well in all directions is
a. horizontally polarized.
b. omnidirectional.
c. bidirectional.
d. isotropic.
isotropic
How many channels does the CU–547/GR antenna coupler support?
a. 2.
b. 4.
c. 6.
d. 8.
4
When using the Fluke 8025A multimeter, what is the input direct current (DC) voltage
range that can be measured when the function selector is in the DC volts (V) position?
a. 0 to +320.
b. 0 to +1000.
c. –320 to +320.
d. –1000 to +1000.
–1000 to +1000
When using the Fluke 8025A multimeter for diode checks, what does it mean when you get
an “OL” indication when you place the leads across the diode and also when the leads are
reversed?
a. Diode is considered operational.
b. You need to use a different probe.
c. Diode is considered non-operational.
d. Diode needs to be checked while connected to a circuit.
Diode is considered non-operational
What oscilloscope control adjusts how fast the trace is drawn across the screen?
a. Ground (GND) input coupling switch.
b. Volts per division (VOLTS/DIV).
c. Time per volts (TIM/VOLTS).
d. Time per division (TIM/DIV).
Time per division (TIM/DIV)
Which is not a reason why oscilloscope probes are used?
a. They are shielded to block noise and extraneous signals.
b. They are an isolation device for the oscilloscope input.
c. Connects the oscilloscope to the device under test.
d. They ensure circuit loading.
They ensure circuit loading
Before measuring a signal with the oscilloscope and the source voltage is totally unknown,
it is wise to start with a divider probe rated at
a. 1:1.
b. 10:1.
c. 100:1.
d. 150:1.
100:0
Which test equipment item would you use to check transmission lines and antenna systems
for proper operation?
a. Earth ground tester.
b. Radio frequency (RF) generator.
c. AN/TPM−32 Video Signal Processor test set.
d. Portable Instrument Landing System Receiver (PIR).
RF Generator
Which is not a waveform produced by a function generator?
a. Sine wave.
b. Square wave.
c. Sawtooth wave.
d. Compound wave.
Compound wave
What feature of the 436A power meter is ideal for monitoring fast changes while adjusting peak transmitter output? a. Autorange. b. Digital display. c. Auxiliary meter. d. Relative power meter
Auxiliary meter
For greatest wattmeter accuracy, select the power element(s) having
a. the highest possible power range that will cover the measured signal.
b. the lowest possible power range that will not result in over-ranging.
c. a power range ratio of at least 100:1.
d. N-type connectors.
the lowest possible power range that will not result in over-ranging
When bench-checking a transmitter, what test equipment should you use to absorb any
transmitted radio frequency (RF) signals?
a. Ameritec Model (AM)‒48 transmission test set.
b. Time domain reflectometer (TDR).
c. Dummy load.
d. Wattmeter.
Dummy load
