Hello,

I am interested in recording the raw uncalibrated measurment at a PNA receiver of a time domain signal. In the example in the attached image, the frequencies of interest would be multiples of 2.5GHz (harmonics of the input data).

Can anyone think of a possible way to provide a phase reference for the receiver? In a normal S-parameter measurment, the the phase of S21 is relative to the incoming CW wave, but since the incoming wave in this case is an external time domain signal, the PNA would not have its normal reference.

Please see the attached image, and thankyou for any comments.

Regards.

I am interested in recording the raw uncalibrated measurment at a PNA receiver of a time domain signal. In the example in the attached image, the frequencies of interest would be multiples of 2.5GHz (harmonics of the input data).

Can anyone think of a possible way to provide a phase reference for the receiver? In a normal S-parameter measurment, the the phase of S21 is relative to the incoming CW wave, but since the incoming wave in this case is an external time domain signal, the PNA would not have its normal reference.

Please see the attached image, and thankyou for any comments.

Regards.

Save the data.

Then, replace the thru with a DUT and view magnitude and phase at those same frequencies.

Save the data.

Then plot (outside of the PNA) the change in magintude and phase at the frequencies measured when the thru is replaced by the DUT.

The output of the DUT would have to be significantly padded to avoid driving the receiver into compression.

This works in terms of magnitude (essentially using the PNA as a specturm analyzer), but if phase information is desired, the receiver needs some sort of reference to specify the phase, correct?

Thank you!

You will put a clock data signal at 2.5 GHZ creating putative square waves and want to measure the effective mag and phase of the signal and it's harmonics.?

Of course, the pattern have a base frequency of the GCD of the pattern and so you need a grid of those frequencies to reconstruct the waveform.

Normally such a measurement would require something like the NVNA (Non-linear-vector network analyzer) to allow reconstruction. If the pattern grid were based on a common reference such as 10 MHz, then the NVNA could measure it. The NVNA utilizes something called a phase reference that provides the needed phase-reference.