Extra exam question E4D01
Subelement E4, AMATEUR PRACTICES· Group E4D
What is meant by the blocking dynamic range of a receiver?
- A.The difference in dB between the noise floor and the level of an incoming signal that will cause 1 dB of gain compression (correct answer)
- B.The minimum difference in dB between the levels of two FM signals that will cause one signal to block the other
- C.The difference in dB between the noise floor and the third-order intercept point
- D.The minimum difference in dB between two signals which produce third-order intermodulation products greater than the noise floor
WhyBlocking dynamic range is the difference in dB between a receiver's noise floor and the level of an incoming signal that causes 1 dB of gain compression. Blocking dynamic range is defined as the difference in dB between a receiver's noise floor and the level of an incoming signal strong enough to cause 1 dB of gain compression, a practical measure of how strong a nearby signal can get before it starts to noticeably desensitize the receiver, answer A. It isn't a minimum spacing between two FM signals, isn't the gap to the third-order intercept point, and isn't tied to intermodulation products exceeding the noise floor, those describe other, related but distinct dynamic range specifications.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
Related questions
- E4D02Which of the following describes problems caused by poor dynamic range in a receiver?
- E4D03What creates intermodulation interference between two repeaters in close proximity?
- E4D04Which of the following is used to reduce or eliminate intermodulation interference in a repeater caused by a nearby transmitter?
- E4D06What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?
- E4D07Which of the following reduces the likelihood of receiver desensitization?