Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-005-009
When using some deviation meters, it is important to know:
- Amodulation index
- Bmodulating frequency
- Cpass-band of the IF filter
- Dmodulating frequency and the modulation index
Correct answer: D — modulating frequency and the modulation index. From the official ISED question bank, verified word for word.
Why
Some deviation meters calculate how much the carrier frequency swings by using a formula that requires both the modulating frequency and the modulation index. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.
Drill A-005 — free, no account