GMDSS Maintainer: Element 9

1. A The local oscillator frequency is beating against the incoming signal to produce an Intermediate Frequency (IF).
2. B The output signal of the Phase Locked Loop (PLL) circuit in the frequency synthesizer has become unlocked.
3. C The output signal of an AF amplifier stage is greater than the input signal.
4. D The weak RF signal has been suppressed at the limiter stage of the received by capture effect.

Tip: press A-D to answer