What is meant by the blocking dynamic range of a receiver?
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
The minimum difference in dB between the levels of two FM signals that will cause one signal to block the other
The difference in dB between the noise floor and the third-order intercept point
The minimum difference in dB between two signals which produce third-order intermodulation products greater than the noise floor
Explanation
Blocking dynamic range is measured from the receiver's noise floor up to the level of an off-channel signal that reduces gain for the wanted signal by 1 dB. The choice describing two signals whose third-order products rise above the noise floor defines intermodulation-free dynamic range, a separate specification.