Calibration Method Summary - Agilent Technologies FieldFox N9923A User Manual

Verify a Calibration
 Connect a LOAD standard at the calibration reference plane (where calibration
 In CAT Mode, select
 In NA Mode, select
 Observe the trace on the FieldFox screen:
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 Method Summary

 Mechanical Full 2-port Cal is ALWAYS the most accurate Cal method. The
 QuickCal (Opt 122) QuickCal should be performed when good accuracy is
 CalReady is accurate ONLY when the DUT is connected at the test ports and
 For highest accuracy, a new QuickCal or Mechanical Cal should be performed:
Calibration for NA, CAT, and VVM Modes
standards were connected). This may be at the end of the jumper cable or at
FieldFox PORT 1 connector.
Return
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Lower than 35 dB indicates a GOOD calibration.
o
Higher than 0 dB indicates that you should recalibrate.
o
quality.
when moving the cable (>5 dB), the jumper cable may need to be replaced.
quality of a Mechanical Cal is completely dependent on the quality of the
OPEN, SHORT, LOAD standards and the quality of the standard connections.
Use the correct high quality standards to ensure the most accurate calibration.
required while using a jumper cable or adapter.
During QuickCal, do NOT „Skip Load‟ when measuring a DUT with good
o
match (Return Loss better than 15 dB).
most accurate at room temperature.
When the temperature changes more than about 10°F (5°C)
o
When the connection to the DUT requires a different jumper cable or
o
adapters.
When any of the following measurement settings change: Frequency Range,
o
Power Level, IF BW, and Resolution.
Loss.
with Log Mag format.
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