Agilent Technologies 8753ET User Manual page 305

Calibrating for Increased Measurement Accuracy
Enhanced Frequency Response Error Correction
NOTE Include any adapters or cables that you will have in the device measurement.
That is, connect the standard device where you will connect your device under
test.
NOTE The thru in most calibration kits is defined with zero length. The correction
will not work properly if a non-zero length thru is used, unless the calibration
kit is modified to change the defined thru to the length used. This is
important for measurements of non-insertable devices (devices having ports
that are both male or both female). The modified calibration kit must be
saved as the user calibration kit, and the
selected before the calibration is started.
16.To measure the standard, when the trace has settled, press:
FWD TRANS THRU
FWD MATCH THRU
STANDARDS DONE
The analyzer underlines the softkey label after it makes each measurement.
17.Press
ISOLATION
If you will be measuring devices with a dynamic range less than 90 dB, press:
OMIT ISOLATION
If you will be measuring devices with a dynamic range greater than 90 dB, follow
these steps:
a. Connect impedance-matched loads to the test ports. Include the adapters that you
would include for your device measurement.
If you will be measuring highly reflective devices such as filters, use the test
NOTE
device, connected to the reference plane and terminated with a load, for the
isolation standard.
b. Activate at least four times more averages than desired during the device
measurement.
c. Press
Cal
ISOL'N STD DONE
d. Return the averaging to the original state of the measurement, and press
RESUME CAL SEQUENCE
18.To compute the error coefficients, press:
DONE ENH RESP CAL
6-24
or
REV TRANS THRU
or
REV MATCH THRU
and select from the following two options:
RESUME CAL SEQUENCE
.
.
softkey must be
USER KIT
ISOLATION FWD or REV
Cal