Advanced Qualification · A-006 Receivers · A-006-005-011
Which of these measurements is a good indicator of VHF receiver performance in an environment of strong out-of-band signals?
- A Two-tone Third-Order IMD Dynamic Range, 10 MHz spacing
- B Third-Order Intercept Point
- C Blocking Dynamic Range
- D Intermediate frequency rejection ratio
Correct answer: A — Two-tone Third-Order IMD Dynamic Range, 10 MHz spacing. From the official ISED question bank, verified word for word.
Why
Two-tone Third-Order IMD Dynamic Range, 10 MHz spacing measures how well a receiver handles two strong signals close to your desired frequency without creating new, unwanted signals that mask weak stations. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.