GMDSS Maintainer: Element 9

1. A Use an oscilloscope to visually display AC signals on the output of each AF amplifier stage.
2. B Use a spectrum analyzer to visually display the amplitude and frequency of each AF amplifier stage input.
3. C Use a signal generator to inject a 1 KHz signal into the first AF amplifier stage and evaluate audio output.
4. D Use a digital voltmeter to measure transistor bias voltages in each AF amplifier stage.

Tip: press A-D to answer