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E4A - Amateur Practices

Extra Class

Test equipment: spectrum and network analyzers, vector analyzers

11 questions | Updated: Dec 9, 2025

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E4A01

Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?

E4A02

Which of the following parameters does a spectrum analyzer display on the vertical and horizontal axes?

E4A03

Which of the following test instruments is used to display spurious signals and/or intermodulation distortion products generated by an SSB transmitter?

E4A04

How is compensation of an oscilloscope probe performed?

E4A05

What is the purpose of using a prescaler with a frequency counter?

E4A06

What is the effect of aliasing on a digital oscilloscope when displaying a waveform?

E4A07

Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge?

E4A08

Which of the following is used to measure SWR?

E4A09

Which of the following is good practice when using an oscilloscope probe?

E4A10

Which trigger mode is most effective when using an oscilloscope to measure a linear power supply’s output ripple?

E4A11

Which of the following can be measured with an antenna analyzer?