Key Topic 76: Oscilloscopes

Question 1

3-76L1: What is used to decrease circuit loading when using an oscilloscope?

A. Dual input amplifiers.
B. 10:1 divider probe.
C. Inductive probe.
D. Resistive probe.

Answer 1

B. 10:1 divider probe.

Question 2

3-76L2: How does a spectrum analyzer differ from a conventional oscilloscope?

A. The oscilloscope is used to display electrical signals while the spectrum analyzer is used to measure ionospheric reflection.

B. The oscilloscope is used to display electrical signals in the frequency domain while the spectrum analyzers used to display electrical signals in the time domain.

C. The oscilloscope is used to display electrical signals in the time domain while the spectrum analyzer is used to display electrical signals in the frequency domain.

D. The oscilloscope is used for displaying audio frequencies and the spectrum analyzer is used for displaying radio frequencies.

Answer 2

C. The oscilloscope is used to display electrical signals in the time domain while the spectrum analyzer is used to display electrical signals in the frequency domain.

Question 3

3-76L3: What stage determines the maximum frequency response of an oscilloscope?

A. Time base.
B. Horizontal sweep.
C. Power supply
D. Vertical amplifier.

Answer 3

D. Vertical amplifier.

Question 4

3-76L4: What factors limit the accuracy, frequency response, and stability of an oscilloscope?

A. Sweep oscillator quality and deflection amplifier bandwidth.
B. Tube face voltage increments and deflection amplifier voltage.
C. Sweep oscillator quality and tube face voltage increments.
D. Deflection amplifier output impedance and tube face frequency increments.

Answer 4

A. Sweep oscillator quality and deflection amplifier bandwidth.

Question 5

3-76L5: An oscilloscope can be used to accomplish all of the following except:

A. Measure electron flow with the aid of a resistor.
B. Measure phase difference between two signals.
C. Measure velocity of light with the aid of a light emitting diode.
D. Measure electrical voltage.

Answer 5

C. Measure velocity of light with the aid of a light emitting diode.

Question 6

3-76L6: What instrument is used to check the signal quality of a single-sideband radio transmission?

A. Field strength meter.
B. Signal level meter.
C. Sidetone monitor.
D. Oscilloscope.

Answer 6

D. Oscilloscope.