Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-004-009
What measurement can be made of a single-sideband phone transmitter's amplifier by performing a two-tone test using an oscilloscope?
- A Its frequency deviation
- B Its percent of carrier phase shift
- C Its percent of frequency modulation
- D Its linearity
Correct answer: D — Its linearity. From the official ISED question bank, verified word for word.
Why
A two-tone test sends two audio signals into the transmitter while an oscilloscope watches the output waveform. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.