🔍 Key Concepts

• Magnetron operation – how current relates to RF power output and load conditions • Standing Wave Ratio (SWR) – what happens when there is a mismatch in the transmission line or antenna system • The role of AFC (Automatic Frequency Control) crystal and the external magnetic field in radar operation

💭 Think About

• Ask which condition would most directly change the load seen by the magnetron and therefore its current draw • Consider which choice is primarily about frequency control versus power transfer and mismatch • Think about what happens to the transmitter when a lot of power is reflected back instead of being radiated efficiently

✅ Before You Answer

• Identify which option is associated with reflected power and mismatch in RF systems • Confirm which components (AFC crystal, magnetic field, duty cycle, SWR) mainly affect frequency or timing rather than current draw • Make sure the selected choice is the one most commonly linked to abnormal transmitter current in radar systems