Calibration Routines; Response Calibration; Response And Isolation Calibration; Enhanced Response Calibration - Agilent Technologies 8753ET User Manual

Operating Concepts

Calibration Routines

Calibration Routines

There are twelve different error terms for a two-port measurement that can be corrected by accuracy
enhancement in the analyzer. These are directivity, source match, load match, isolation, reflection tracking,
and transmission tracking, each in both the forward and reverse direction. The analyzer has several different
measurement calibration routines to characterize one or more of the systematic error terms and remove
their effects from the measured data.
The calibrate menu allows you to perform the measurement calibration routines. These procedures range
from a simple frequency response calibration to a full two-port calibration that effectively removes all twelve
error terms.

Response Calibration

The response calibration, activated by pressing the softkey within the calibrate menu,
RESPONSE
provides a normalization of the test setup for reflection or transmission measurements. This calibration
procedure may be adequate for measurement of well matched devices. This is the simplest error-correction
to perform, and should be used when extreme measurement accuracy is not required.

Response and Isolation Calibration

The response and isolation calibration, activated by pressing the softkey within
RESPONSE & ISOL'N
the calibrate menu, provides a normalization for frequency response and crosstalk errors in transmission
measurements, or frequency response and directivity errors in reflection measurements. This procedure
may be adequate for measurement of well matched high-loss devices.

Enhanced Response Calibration

The enhanced response calibration, activated by pressing the softkey
ENHANCED RESPONSE
within the calibrate menu, provides a one-port calibration to correct for directivity, source match, and
frequency response for reflection measurements, and corrects for source match as well as frequency
response for transmission measurements.
For ES models, enhanced response calibration improves accuracy in transmission measurements compared
to a response calibration or a response and isolation calibration, but it is not as accurate as a full 2-port
calibration. For ET models, this calibration provides the best accuracy for measurements with a T/R test set.
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