Agilent Technologies N4413A User Manual page 159

The analyzer is only capable of displaying uncorrected data and will not accurately display
the S-parameter of the DUT on-screen in Display-Data mode.
To assist in the tuning process, analyzer trace-memory is used to make the analyzer screen
emulate the corrected data as a baseline for tuning using Data/Mem mode.
To prepare for tuning follow these steps:
1. Select a compatible pair (if using 2 S-parameters) and connect the DUT accordingly.
2. Make a measurement of the DUT. The difference between the corrected and uncorrected
data will be used in the analyzer's trace memory.
3. Select the primary and (optional) secondary S-parameter.
4. Use the Scalar Correction to VNA buttons to load the analyzer's trace memory so that the
on-screen display will emulate the corrected data.
This is only a scalar correction and should be used only as a baseline for tuning.
NOTE
Once significant change is made to the device's response, the DUT should be
re-measured and the emulation repeated.
Chapter 5
Menu Reference
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