Advanced Qualification · A-007 Feedlines and matching · A-007-009-011
What precautions should you take before beginning repairs on a microwave feed horn or waveguide?
- A Be sure propagation conditions are unfavourable for tropospheric ducting
- B Be sure to wear tight-fitting clothes and gloves to protect your body and hands from sharp edges
- C Be sure the transmitter is turned off and the power source is disconnected
- D Be sure the weather is dry and sunny
Correct answer: C — Be sure the transmitter is turned off and the power source is disconnected. From the official ISED question bank, verified word for word.
Why
Microwave transmitters can deliver dangerous levels of radio frequency energy that cause severe burns or internal injury even without touching the metal parts. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.