Trying to make an accurate power measurement at the output of a frequency converter. The receiver power cal cannot be selected in the scalar mixer measurement class on an 8364C with A.09.20.02 application code. Any suggestions?

Could you explain why Opwr is better? Is this unique to the frequency converter application? Which test cases would benefit from the receiver power cal?

Opwr is better because the cal and measurement are both match corrected, and yes, this is unique (at least for now).

We needed to add this improved power cal becuase we cannot use standard techniques for for gain (using ratio measurements and common S21 cal techniques) becasue the input and output frequency are different. Thus, we had to develop and improved measurment for input and output power. We chose to give them a special name (Ipwr and Opwr) instead of R and B, becasue R and B are a little ambiguous.

In the future, I hope to add the same cal to the standard S-parameter channel to support match corrected receiver cal measurements.

I can see how the SMC power cal can correct the power to the input of the DUT, but I don't see how it corrects the power that is output by the DUT. Could you please summarize how the correction works?

During the calibration procedure, we determine the system source and load match. With the DUT connected, we measure S11 and S22. From this data, we can calculate the mismatch that occurs between the test system and the DUT, thereby correcting the power readings at both the input and output of the DUT. This correction effectively removes mismatch ripple versus frequency for the SMC conversion loss/gain measurement.

We needed to add this improved power cal becuase we cannot use standard techniques for for gain (using ratio measurements and common S21 cal techniques) becasue the input and output frequency are different. Thus, we had to develop and improved measurment for input and output power. We chose to give them a special name (Ipwr and Opwr) instead of R and B, becasue R and B are a little ambiguous.

In the future, I hope to add the same cal to the standard S-parameter channel to support match corrected receiver cal measurements.