Advanced Qualification · A-007 Feedlines and matching · A-007-006-008
A transmitter has a power output of 125 watts. There is a loss of 0.8 dB in the transmission line, 0.2 dB in the antenna tuner, and a gain of 10 dBd in the antenna. The Effective Radiated Power (ERP) is:
- A 134
- B 1000
- C 1250
- D 1125
Correct answer: B — 1000. From the official ISED question bank, verified word for word.
Why
Start by combining the losses: 0.8 dB plus 0.2 dB equals 1.0 dB lost in the feedline and tuner. 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.