74 FieldFox User’s Guide
Calibration Method Summary
Mechanical Full 2-port Cal is ALWAYS the most accurate Cal method. The
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.
QuickCal is ideal for DTF measurements. QuickCal should be performed when
good accuracy is required and when using a jumper cable or adapter.
o QuickCal is NOT recommended when the DUT has 3.5 mm-female or SMA-
female connectors.
o Even with the optional Load, phase accuracy begins to degrade when the
return loss is greater than about 20dB.
CalReady is accurate ONLY when the DUT is connected at the test ports and
most accurate at room temperature.
For highest accuracy, a new QuickCal or Mechanical Cal should be performed:
o When the temperature changes more than about 10°F (5°C)
o When the connection to the DUT requires a different jumper cable or
adapters.
o When any of the following measurement settings change: Frequency Range,
Power Level, IF BW, and Resolution.
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