Which Monopulse Secondary Surveillance Radar (MSSR) subassembly develops the radio frequency (RF) sample video for monitoring?

Which Monopulse Secondary Surveillance Radar (MSSR) subassembly develops the radio frequency (RF) sample video for monitoring?

• A. High duty power amplifier
• B. RF sample video processor
• C. Low duty power amplifier
• D. Monitoring interface

Answer: (C)

In MSSR systems, monitoring the transmitter’s performance requires a small, non-intrusive sample of the RF output. This sample video is taken from the RF path through a sampling network and then amplified to a level suitable for monitoring instrumentation. The amplifier used for this role must operate at low duty cycle so it can gather samples without loading or disturbing the main radar transmit path during the high-power pulses. The low duty power amplifier is designed to take that tiny RF sample and boost it to a usable monitoring level, while staying out of the way of the main transmitter during its high-power, high-duty operations. This keeps the main radar performance intact while providing a representative RF sample for health checks, calibration, and waveform monitoring. The high duty power amplifier is the main transmitter power stage and handles the primary RF output; it isn’t used to develop the RF sample video for monitoring. The RF sample video processor would handle processing of the sampled signal after it’s created, not generate the sample itself. The monitoring interface is what presents the monitored data to operators or automated systems, not the source of the RF sample. So, the subassembly that develops the RF sample video for monitoring is the low duty power amplifier.

In MSSR systems, monitoring the transmitter’s performance requires a small, non-intrusive sample of the RF output. This sample video is taken from the RF path through a sampling network and then amplified to a level suitable for monitoring instrumentation. The amplifier used for this role must operate at low duty cycle so it can gather samples without loading or disturbing the main radar transmit path during the high-power pulses.

The low duty power amplifier is designed to take that tiny RF sample and boost it to a usable monitoring level, while staying out of the way of the main transmitter during its high-power, high-duty operations. This keeps the main radar performance intact while providing a representative RF sample for health checks, calibration, and waveform monitoring.

The high duty power amplifier is the main transmitter power stage and handles the primary RF output; it isn’t used to develop the RF sample video for monitoring. The RF sample video processor would handle processing of the sampled signal after it’s created, not generate the sample itself. The monitoring interface is what presents the monitored data to operators or automated systems, not the source of the RF sample.

So, the subassembly that develops the RF sample video for monitoring is the low duty power amplifier.