1-Port Cable Trimming Measurements; How To Make A 1-Port Cable Trimming Measurement - Keysight N9912A User Manual

VVM (Vector Voltmeter) Mode - Option 308

1-Port Cable Trimming Measurements

1-Port Cable Trimming Measurements
A 1-Port Cable Trimming measurement is used in a cable fabrication procedure
to validate proper electrical length.

How to make a 1-Port Cable Trimming Measurement

1. Press Mode then
2. Press Freq/Dist then enter the frequency for the VVM measurement.
3. Press Meas Setup 4 then
4. If using an adapter or jumper cable to connect the cables to the FieldFox,
Verification: Perform the following optional steps to ensure that the FieldFox is
properly calibrated. Steps 1 through 9 need only be done once to determine
the difference in phase between the Open and Short standard. Once that value
is known, perform steps 10 through 14 to verify a calibration.
1. Press Mode then NA. Select S11.
2. Press Freq/Dist and enter start and stop frequencies that span about 40%
3. Perform a calibration using a cal kit (NOT Quick Cal).
4. Press Meas 1 then
5. Connect the Short standard to the RF OUT calibration plane.8
6. Press Trace 6 then
7. Connect the Open standard to the RF OUT calibration plane.
8. Press Data Math then Data/Mem.
Keysight N9912-90001 User's Guide
VVM
press Cal 5 then select
OSL Cal. Follow the FieldFox calibration prompts. Learn more about VVM
calibration on page 14-8.
of the VMM measurement frequency. For example, for a 1 GHz
measurement, enter Start .8 GHz and Stop 1.2 GHz.
Format
Math and
— The R receiver measures incident
signal (green line) out of the source.
— The A receiver measures reflected
signal (red line) from the end of the
DUT (black line).
— In VVM mode, the display ALWAYS
shows ratioed (A/R) measurements
which is the electrical length of the
DUT.
then 1-Port Cable Trimming.
Zero OFF.
Calibation Type, then either
Phase.
Memory. Then
QuickCal (+ Load) or
Data-> Mem.
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