Which of the following test procedures may be used to determine a VHF receiver's minimum discernible signal?
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.
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 audiovoltmeter connected to the AFoutputpointindicates a 3-dB increase.
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.
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.