I want to make SMC measurements; swept RF, stepped LO, fixed IF. The RF and LO power levels are fixed.

For example, my three measurements will be:

Measurement1

Input (Center/Span) 8GHz, -100MHz

LO1 (Fixed ) 9GHz

Output (Center/Span) 1GHz, 100MHz

Measurement2

Input (Center/Span) 9GHz, -100MHz

LO1 (Fixed ) 10GHz

Output (Center/Span) 1GHz, 100MHz

Measurement3

Input (Center/Span) 10GHz, -100MHz

LO1 (Fixed ) 11GHz

Output (Center/Span) 1GHz, 100MHz

I am using a PNA E8364B, (014, 016, 080, 081, 083, UNL) A.06.04.32 and a RFSource 83623A.

I will eventually be doing a VMC measurement. I have the required mixers and filters for the VMC. The reference mixer/filter is currently installed between SOURCE_OUT and RCVR_R1_IN...so I am setup for the VMC measurement, but I am initially performing a SMC on Channel2 and will use the SMC for a sanity check.

I would like to do one calibration, then make the above measurements, but I keep getting the Error Message 516 "Critical parameters do not match your calibration...."

How can I do all three measurements with one calibration?

For example, my three measurements will be:

Measurement1

Input (Center/Span) 8GHz, -100MHz

LO1 (Fixed ) 9GHz

Output (Center/Span) 1GHz, 100MHz

Measurement2

Input (Center/Span) 9GHz, -100MHz

LO1 (Fixed ) 10GHz

Output (Center/Span) 1GHz, 100MHz

Measurement3

Input (Center/Span) 10GHz, -100MHz

LO1 (Fixed ) 11GHz

Output (Center/Span) 1GHz, 100MHz

I am using a PNA E8364B, (014, 016, 080, 081, 083, UNL) A.06.04.32 and a RFSource 83623A.

I will eventually be doing a VMC measurement. I have the required mixers and filters for the VMC. The reference mixer/filter is currently installed between SOURCE_OUT and RCVR_R1_IN...so I am setup for the VMC measurement, but I am initially performing a SMC on Channel2 and will use the SMC for a sanity check.

I would like to do one calibration, then make the above measurements, but I keep getting the Error Message 516 "Critical parameters do not match your calibration...."

How can I do all three measurements with one calibration?

this will cover all your frequencies, but because the span is not as big ( ~2Ghz vs. ~9 Ghz), you can use fewer points in the channel.

However, remember that this trick can only be used in SMC and not in VMC. For correction interpolation to work in SMC, we only care about the input and output frequencies and as long as the selected calset's frequencies cover the channel's input and output frequencies, then interpolation will work fine. In VMC, because we measure phase and the phase of the cal mixer changes based on the LO frequency, then the calibration has to be done at the same LO frequency as the measurement, so in that case you'll have to do 3 separate VMC cals. If you are calibrating your channels programmaticaly, let me know and I'll show you how to calibrate them all at the same time with only connecting each cal standard once.