A spectrum analyzer (SPECAN) can be a useful test instrument to troubleshoot a marine VHF radio. Which of the following is the best procedure to evaluate the input/output stages of a marine VHF transmitter?

Question

A spectrum analyzer (SPECAN) can be a useful test instrument to troubleshoot a marine VHF radio.  Which of the following is the best procedure to evaluate the input/output stages of a marine VHF transmitter?

Accepted Answer

Connect the radio to the SPECAN through an in-line attenuator, apply maximum attentuation and switch the radio to LOW power.  Use an inductive probe to evaluate signals at the input/output of RF transmitter stages.

Answer

Connect the radio to the SPECAN through an in-line attenuator, apply maximum attentuation and set the radio to HIGH power.  Use an inductive probe to evaluate signals at the input/output of AF transmitter stages.

Answer

Connect the radio to the SPECAN through an in-line attenuator, apply maximum attentuation and switch the radio to HIGH power.  Use an inductive probe to evaluate signals at the input/output of RF transmitter stages.

Answer

Connect the radio to the SPECAN through an in-line attenuator, apply minimum attentuation and switch the radio to LOW power.  Use an inductive probe to evaluate signals at the input/output of AF transmitter stages.