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Supplement for the User’s Guide (Firmware Version 7.68)
Calibration Routines
Calibration Routines
Enhanced Response Calibration
The enhanced response calibration, activated by pressing the
softkey 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.
Enhanced Reflection Calibration
The enhanced reflection calibration is activated by selecting under
the menu.
The enhanced reflection calibration effectively removes load match error from the
enhanced response calibration performed on a bilateral device. A bilateral device has an
identical forward (S
21
) and reverse transmission (S
12
) response. Most passive devices (such
as filters, attenuators, or switches) are bilateral. Some passive devices (circulators,
isolators) and most active devices do not have identical forward and reverse transmission
responses and enhanced reflection calibration will not work with these devices.
ECal
The ECal calibration menu is activated by pressing in the calibration menu.
The ECal (Electronic Calibration) system determines systemic errors of the analyzer
through a one-time connection of an ECal module to the network analyzer ports. The
random error of connector repeatability is reduced substantially through a one-time
connection when compared to frequent connections and disconnections of the conventional
short/open/load methods.
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