Select the appropriate S-Parameter and other settings (frequency range,
Press Trace 6 then
Press
Press Cal 5 then
Select a CalReady Cal to compare with the current setting.
Press Esc to exit the cal menu.
View the differences in the two traces.
Verifying Calibration and Jumper Cable Integrity
After calibrating, it is important to verify that the calibration is good. When using
a jumper cable, also verify that the cable is of high quality.
Verify a Calibration
Connect a LOAD standard at the calibration reference plane (where calibration
In CAT Mode, select
In NA Mode, select
For frequencies lower than 9 GHz, observe the trace on the FieldFox screen:
Verifying Phase Accuracy
Connect a LOAD standard at the calibration reference plane (where calibration
In NA Mode, select a S11 Reflection with Polar or Smith Chart format.
Because all LOAD standards have delay, you should see a small amount of
Test the Jumper Cable
With the LOAD standard still connected, move the jumper cable while observing
the trace.
If the measurement trace is relatively stable, the jumper cable is of good
If you observe significant movement in the peaks of the measurement trace
Calibration for NA, CAT, and VVM Modes
resolution, and so forth).
Math and Memory
Data &
Memory.
More
standards were connected). This may be at the end of the jumper cable or at
FieldFox PORT 1 connector.
Return
S11
Lower than 35 dB indicates a GOOD calibration.
o
Higher than 0 dB indicates that you should recalibrate.
o
standards were connected).
phase rotation as a function of frequency. In general, the measurement result
should agree with the characteristics of the calibration standard.
quality.
when moving the cable (>5 dB), the jumper cable may need to be replaced.
then Data->Mem.
Loss.
with Log Mag format.
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