What is the intermediate frequency (IF) created by the MSSR receiver?

The intermediate frequency (IF) created by the MSSR (Monopulse Secondary Surveillance Radar) receiver is 60 MHz. This frequency is determined during the process of mixing the received signal with a generated local oscillator signal, which shifts the signal down to a frequency at which it can be processed more easily.

In radar systems, the selection of the IF is crucial as it allows for the effective processing of the received signals while avoiding interference from other frequencies. The MSSR receiver specifically utilizes this 60 MHz IF for improved sensitivity and the ability to extract target information reliably. This frequency is chosen as it balances the trade-off between processing complexity and the potential for interference, making it optimal for the capabilities required in secondary surveillance operations.

Other frequencies mentioned, like 30 MHz, 90 MHz, and 120 MHz, are not utilized for the MSSR system, as they do not align with the design specifications that ensure optimal functionality for radar signal processing and target tracking.