Advanced Qualification · A-003 Measurements · A-003-005-011
What is the best signal source to connect to the vertical input of an oscilloscope for checking the quality of a transmitted signal?
- A The RF output of the transmitter through a sampling device
- B The RF signals of a nearby receiving antenna
- C The IF output of a monitoring receiver
- D The audio input of the transmitter
Correct answer: A — The RF output of the transmitter through a sampling device. From the official ISED question bank, verified word for word.
Why
To see the true shape and quality of your transmitted radio wave, you must connect the oscilloscope directly to the transmitter's radio frequency output using a sampling device. 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.