AdvancedA-006-005-010
Poor dynamic range of a receiver can cause many problems when a strong signal appears within or near the front-end bandpass. Which of the following is NOT caused as a direct result?
B
Answer
Propagation and operating practice
Type
A
Intermodulation
B
Feedback
C
Cross-modulation
D
Desensitization
Answer Notes
Dynamic range is the ability of a receiver to tolerate very strong signals without suffering from non-linear effects, while still being able to hear weak signals. When dynamic range is exceeded by strong adjacent signals, the receiver's front end becomes overloaded and non-linear. This non-linearity directly produces intermodulation, cross-modulation, and desensitization (blocking).
Feedback, however, is caused by an unintended signal path from an amplifier's output back to its input, resulting in oscillation. It is a fundamental circuit design, shielding, or layout issue rather than a direct consequence of a strong external signal overloading a poor dynamic range front end.
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Poor frequency stability in a receiver usually originates in the:
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Which of these measurements is a good indicator of VHF receiver performance in an environment of strong out-of-band signals?