GMDSS Maintainer: Element 9

1. A Connect an oscilliscope to the antenna input and observe the amplitude of minimum signal voltage plotted on the display’s vertical axis as a function of time on the horizontal axis.
2. B Set a signal generator to the frequency of the VHF receiver, adjust the output signal to near zero, and increase the signal level until an audio voltmeter connected to the AF output point indicates a 3-dB increase.
3. C Connect a spectrum analyzer to the antenna input and apply the maximum amount of attentuation to detect minimum signal level plotted on the display’s vertical axis as a function of frequency on the horizontal axis.
4. D Connect a 156.3 Mhz signal generator to the antenna input, set the VHF receiver to channel 06 and measure dynamic range using an oscilliscope.

Tip: press A-D to answer