Using a Vector Network Analyzer as a Signal Generator with Amplitude Modulation

[Plkmo]

Hi
I am trying to configure my VNA to act as a signal generator with amplitude modulation. Basically, I have set the VNA to use a CW power sweep from high to lower power (2 points), with an external trigger (supplied by a low frequency (LF) source) Because the LF signal triggers the power sweep of the VNA, and each sweep generates (or is supposed to) a high power followed by a low power CW (one cycle), I would expect the VNA output to be a cycled CW with the cycle frequency being the same as the LF frequency, which essentially has the same waveform as an amplitude modulated CW. However, I find (by measuring the waveform with an oscilloscope), that the amplitude modulation period seems not to follow the LF signal. Any ideas or has anyone done it before? Thanks.

[TheUnnamedNewbie]

It could be beneficial to mention the VNA you are using.