G4B01
What item of test equipment contains horizontal and vertical channel amplifiers?
-
A
An ohmmeter
-
B
A signal generator
-
C
An ammeter
-
D
An oscilloscope
G4B02
Which of the following is an advantage of an oscilloscope versus a digital voltmeter?
-
A
An oscilloscope uses less power
-
B
Complex impedances can be easily measured
-
C
Greater precision
-
D
Complex waveforms can be measured
G4B03
Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?
-
A
An oscilloscope
-
B
A field strength meter
-
C
A sidetone monitor
-
D
A wavemeter
G4B04
What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?
-
A
The local oscillator of the transmitter
-
B
An external RF oscillator
-
C
The transmitter balanced mixer output
-
D
The attenuated RF output of the transmitter
G4B05
Why do voltmeters have high input impedance?
-
A
It improves the frequency response
-
B
It allows for higher voltages to be safely measured
-
C
It improves the resolution of the readings
-
D
It decreases the loading on circuits being measured
G4B06
What is an advantage of a digital multimeter as compared to an analog multimeter?
-
A
Better for measuring computer circuits
-
B
Less prone to overload
-
C
Higher precision
-
D
Faster response
G4B07
What signals are used to conduct a two-tone test?
-
A
Two audio signals of the same frequency shifted 90 degrees
-
B
Two non-harmonically related audio signals
-
C
Two swept frequency tones
-
D
Two audio frequency range square wave signals of equal amplitude
G4B08
What transmitter performance parameter does a two-tone test analyze?
-
A
Linearity
-
B
Percentage of suppression of the carrier and undesired sideband for SSB
-
C
Percentage of frequency modulation
-
D
Percentage of carrier phase shift
G4B09
When is an analog multimeter preferred to a digital multimeter?
-
A
When testing logic circuits
-
B
When high precision is desired
-
C
When measuring the frequency of an oscillator
-
D
When adjusting circuits for maximum or minimum values
G4B10
Which of the following can be determined with a directional wattmeter?
-
A
Standing wave ratio
-
B
Antenna front-to-back ratio
-
C
RF interference
-
D
Radio wave propagation
G4B11
Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?
-
A
Receiver
-
B
Transmitter
-
C
Antenna and feed line
-
D
All these choices are correct
G4B12
What effect can strong signals from nearby transmitters have on an antenna analyzer?
-
A
Desensitization which can cause intermodulation products which interfere with impedance readings
-
B
Received power that interferes with SWR readings
-
C
Generation of harmonics which interfere with frequency readings
-
D
All these choices are correct
G4B13
Which of the following can be measured with an antenna analyzer?
-
A
Front-to-back ratio of an antenna
-
B
Power output from a transmitter
-
C
Impedance of coaxial cable
-
D
Gain of a directional antenna