Calibration Method Summary - Keysight N9912A User Manual

 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 phase
 In general, the measurement result should agree with the characteristics of the
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 quality.
 If you observe significant movement in the peaks of the measurement trace when

Calibration Method Summary

 O,S,L is ALWAYS the most accurate Cal method. The quality of an O,S,L Cal is
 QuickCal is ideal for DTF measurements. QuickCal should be performed when
 Preset Cal is ONLY useful for DUT connections made at the RF Out port and most
 For highest accuracy, a new QuickCal or O,S,L Cal should be performed:
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Lower than 0 dB indicates a GOOD calibration.
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Higher than 0 dB indicates that you should recalibrate.
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standards were connected).
rotation as a function of frequency.
calibration standard.
moving the cable (>5 dB), the jumper cable may need to be replaced.
completely dependent on the quality of the OPEN, SHORT, LOAD standards. Use
high quality standards to ensure the most accurate calibration.
good accuracy is required and when using a jumper cable or adapter.
QuickCal is NOT recommended when the DUT has 3.5 mm-female or SMA-
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female connectors.
Even with the optional Load, phase accuracy begins to degrade when the return
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loss is greater than about 20dB.
accurate at room temperature.
when the temperature changes more than about 10°F (5°C)
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when the connection to the DUT requires a different jumper cable or adapters.
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FieldFox User's Guide