Advanced Qualification · A-003 Measurements · A-003-003-006
The dial calibration on the output attenuator of a signal generator:
- A reads half the true output when the attenuator is properly terminated
- B reads accurately only when the attenuator is properly terminated
- C always reads the true output of the signal generator
- D reads twice the true output when the attenuator is properly terminated
Correct answer: B — reads accurately only when the attenuator is properly terminated. From the official ISED question bank, verified word for word.
Why
The dial on a signal generator's attenuator shows the correct power level only when the device is connected to a load that matches its output impedance, a condition known as proper termination. The full explanation — and one for every question — is in Pro.
Practise this section
Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.