🔍 Key Concepts

• Pulse radar timing – short transmit pulse followed by a (longer) listening period • Function of a TR (Transmit-Receive) tube – protecting the receiver during high‑power transmission • Function of an ATR (Anti-Transmit-Receive) tube – routing weak echoes to the receiver during the listening period

💭 Think About

• Think about what is physically happening while the radar is actually radiating a high‑power pulse toward the antenna. • During that brief transmit pulse, which component must be active to keep the sensitive receiver from being burned out? • During the transmit period, is the radar listening for echoes yet, or does that listening happen immediately after the pulse?

✅ Before You Answer

• Be clear on the timing: transmit pulse vs. receive (listening) interval. • Match each tube (TR and ATR) to its primary job: receiver protection during transmit versus coupling echoes to the receiver during receive. • Ask: At the exact moment of radiation (transmit pulse), is the system protecting the receiver or trying to receive echoes? Choose the option that fits that moment.