GROL Test Equipment and Measurements

Question 1

What instrument is used to measure the standing wave ratio (SWR) on a transmission line?

Accepted Answer

SWR meter (directional wattmeter)

Answer

Spectrum analyzer

Answer

Oscilloscope

Answer

Signal generator

Question 2

What does a spectrum analyzer display?

Accepted Answer

Signal amplitude versus frequency

Answer

Signal amplitude versus time

Answer

Phase versus frequency

Answer

Impedance versus frequency

Question 3

What is the function of a signal generator in RF testing?

Accepted Answer

To provide a known, calibrated test signal at a specified frequency and amplitude

Answer

To measure transmitted power

Answer

To display waveform shape on a screen

Answer

To measure noise figure

Question 4

What does an oscilloscope primarily measure?

Accepted Answer

Voltage as a function of time

Answer

Frequency spectrum of a signal

Answer

Power in dBm

Answer

SWR on a transmission line

Question 5

What is a dummy load used for in radio testing?

Accepted Answer

To provide a non-radiating resistive load for testing transmitters without transmitting over the air

Answer

To increase transmitter power output

Answer

To match a mismatched antenna system

Answer

To measure receiver sensitivity

Question 6

What is the purpose of a frequency counter in radio equipment testing?

Accepted Answer

To accurately measure the frequency of an oscillator or transmitted signal

Answer

To measure signal power in watts

Answer

To display harmonic content

Answer

To measure capacitance