G4B: Test and monitoring equipment
G4B01:
What item of test equipment contains horizontal and vertical channel amplifiers?
An oscilloscope
An ohmmeter
A signal generator
An ammeter
G4B02:
Which of the following is an advantage of an oscilloscope versus a digital voltmeter?
Complex waveforms can be measured
An oscilloscope uses less power
Complex impedances can be easily measured
Input impedance is much lower
G4B03:
How would a signal tracer normally be used?
To identify an inoperative stage in a receiver
To identify the source of radio transmissions
To make exact drawings of signal waveforms
To show standing wave patterns on open-wire feed-lines
G4B04:
How is a noise bridge normally used?
It is connected between a receiver and an antenna of unknown impedance and is adjusted for minimum noise
It is connected at an antenna's feed point and reads the antenna's noise figure
It is connected between a transmitter and an antenna and tuned for minimum SWR
It is connected between an antenna and ground and tuned for minimum SWR
G4B05:
Which of the following is the best instrument to use to check the keying waveform of a CW transmitter?
A monitoring oscilloscope
A field-strength meter
A sidetone monitor
A wavemeter
G4B06:
What signal source is connected to the vertical input of a monitoring oscilloscope when checking the quality of a transmitted signal?
The attenuated RF output of the transmitter
The local oscillator of the transmitter
The audio input of the transmitter
The transmitter balanced mixer output
G4B07:
What is an advantage of a digital voltmeter as compared to an analog voltmeter?
Significantly better precision for most uses
Better for measuring computer circuits
Better for RF measurements
Faster response
G4B08:
What instrument may be used to monitor relative RF output when making antenna and transmitter adjustments?
A field-strength meter
An antenna noise bridge
A multimeter
A Q meter
G4B09:
How much must the power output of a transmitter be raised to change the "S" meter reading on a distant receiver from S8 to S9?
Approximately 4 times
Approximately 2 times
Approximately 3 times
Approximately 5 times
G4B10:
Which of the following can be determined with a field strength meter?
The radiation pattern of an antenna
The radiation resistance of an antenna
The presence and amount of phase distortion of a transmitter
The presence and amount of amplitude distortion of a transmitter
G4B11:
Which of the following might be a use for a field strength meter?
Close-in radio direction-finding
A modulation monitor for a frequency or phase modulation transmitter
An overmodulation indicator for a SSB transmitter
A keying indicator for a RTTY or packet transmitter
G4B12:
What is one way a noise bridge might be used?
Pre-tuning an antenna tuner
Determining an antenna's gain in dBi
Pre-tuning a linear amplifier
Determining the line loss of the antenna system
G4B13:
What is one measurement that can be made with a dip meter?
The resonant frequency of a circuit
The tilt of the ionosphere
The gain of an antenna
The notch depth of a filter
G4B14:
Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?
Antenna and feedline
Receiver
Transmitter
All of these answers are correct
G4B15:
Which of the following can be measured with a directional wattmeter?
Standing Wave Ratio
Antenna front-to-back ratio
RF interference
Radio wave propagation
G4B16:
Why is high input impedance desirable for a voltmeter?
It decreases the loading on circuits being measured
It improves the frequency response
It decreases battery consumption in the meter
It improves the resolution of the readings
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