Which of the following test procedures may be used to determine a VHF receiver's minimum discernible signal?

Question

Accepted Answer

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 .

Answer

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.

Answer

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.

Answer

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.

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