Extra exam question E4A03
Subelement E4, AMATEUR PRACTICES· Group E4A
Which of the following test instruments is used to display spurious signals and/or intermodulation distortion products generated by an SSB transmitter?
- A.Differential resolver
- B.Spectrum analyzer (correct answer)
- C.Logic analyzer
- D.Network analyzer
WhyA spectrum analyzer is the test instrument used to display spurious signals and intermodulation distortion products generated by an SSB transmitter. A spectrum analyzer displays signal amplitude across a range of frequencies, which makes it the right tool for revealing spurious emissions and intermodulation distortion products an SSB transmitter generates alongside its intended signal, answer B. A differential resolver and logic analyzer aren't RF test instruments, and a network analyzer is built to characterize a device's response to a signal passed through it, not to display spurious content on a transmitter's own output.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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