14- 8 Keysight N9912-90001 User’s Guide
VVM (Vector Voltmeter) Mode - Option 308
VVM Mode Settings
14-
VVM Calibration
In VVM Mode, calibration is performed in the same manner as in CAT and NA
Modes. In summary, a Preset Cal is sufficient when the DUT is connected
directly to the FieldFox RF Out test port. When using an adapter or jumper
cable to connect the DUT, first perform a QuickCal + Load or OSL Cal before
making measurements. Learn more about these FieldFox calibrations from
Chapter 7, “Calibration for NA, CAT, and VVM Modes”, on page 7-1.
To make an accurate measurement, set Zero OFF
before calibrating.
Zeroing
When performing a Cable Trimming operation, one cable is compared to
another. After measuring the first, shorter cable, pressing Zero performs the
same operation as Data->Memory, then Data/Mem, also known as
Normalization. All subsequent electrical length measurements are relative to
the stored measurement.
To make an accurate measurement, set Zero ON
before calibrating. Zero after
changing the IF Bandwidth.
How to select Zeroing
—Press Meas Setup 4.
—Then Zero Ref
.
— Open – select to display Phase = 0.0 Deg when zeroed.
— Short - select to display Phase = 180.0 Deg when zeroed.
—Then Zero ON
.
— Select Zero OFF
to turn zeroing off.
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