🔍 Key Concepts

• TR (Transmit-Receive) tube function in marine radar — what does it do during the transmit pulse? • Protection of sensitive receiver components from high-power transmitter pulses • Location of the TR tube in the radar waveguide system (between which major components?)

💭 Think About

• Think about which radar component handles very low-level echo signals and therefore must be protected from the strong transmitted pulse. • Ask yourself: when the radar set transmits, which component is most vulnerable if the TR tube does NOT properly isolate it? • Which of the listed parts normally deals with very high power, and which normally deals with very low power?

✅ Before You Answer

• Be clear on the basic job of the TR tube: switching/isolation between transmit and receive. • Identify which device is the most sensitive to high power among the options given. • Verify in your notes/guide where the TR tube sits in the block diagram of a typical marine radar (between transmitter and receiver front end).