Hi Everyone,
I was hoping to inquire about calibration functionality in my PNA.
In some older calibrations I see R(A), R(B)...R(R1) in the "Cal Type/Ports" Column
I see in the help section that it shows the measurement type it corrects.
I'm not sure what this means, I want to perform a calibration and make sure it's exactly the same level as the one highlighted, but I don't get these Response factors. What measurement types do they represent? And how can I perform a calibration such as to allow for these "Measurement Types"
Thank you for your time,
Chris
Hi Chris,
They are the same. You must have updated the firmware on your PNA since you did the cal on 10-11-19. The only difference is in the verbosity of the Cal Type/Ports field. Listing all the possible correction types in that column was getting out of hand, especially since we introduced our PXI VNA which could have many more ports than 4. So now, only the highest level correction type is listed. when you look at these correction types (like 4P+/1-2-3-4) the first number is the total number of ports in the s-parameter calibration portion of the calset. If that is followed by a "+", it means that a power calibration was also performed as part of that calibration. When power calibration is included, then that mean all source ports in that calibration have source power corrections and all reference (R1, R2, ...) and measurement receivers (A, B, C, D, ...) associated with the calibrated ports also have a response correction. In the old cal type field when you saw something like R(A), it meant a response correction for receiver A. In addition to our legacy receiver naming convention (Rn, A, B, C, D, ...) we also use the standard "a", "b" notation, where "a" followed by a port number refers to the reference receiver for the port and "b" is the measurement receiver. So if you actually look at the list of error terms in a calset (which you can do with the Calset Viewer dialog) you may see something like ResponseTracking(R1), but also ResponseTracking(a1). they are the same error term.