In a RADAR receiver, the discriminator is a crucial component responsible for detecting and processing the differences in frequency between the transmitted and received signals. It plays a critical role in extracting information about the target's range and velocity.

In Figure 8A1, block 50 represents the discriminator, which processes the intermediate frequency (IF) signal to extract modulation information, such as target range and Doppler frequency shift caused by the relative motion of the target.

Mnemonic: "DISC - Detecting, Intermediate frequency, Signal, Comparator"

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