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4294A -Difference between calibration and user calibration

Question asked by Abe on Jun 30, 2011

I am trying to figure out how to perform calibration procedure. I only have a Agilent 04294-61001(100 ohm resistor) currently and we plan to setup our own adapter for calibration later.

I have downloaded the 4294A library and find out 2 good examples "" and "User". Both the two VIs can select "7mm 42942A" and "PROBE 42941A" to measure "Open","Load","Short", but the command is different. "Calibration" uses ECAL{P|A|B|C} while "User Calibration" uses CAL{A|B|C}. I have read the manual through and there is no where to tell what is the difference in between. Could anyone tell me what is the difference?

Also, I don't quite understand the difference between calibration and compensation and when we need the compensation? In "", it performs first calibration and then compensation while in "User", it performs only the user calibration. Is user calibration doesn't need compensation?

Thanks in advance.