Agilent Technologies 8753ET User Manual page 318

Calibrating for Increased Measurement Accuracy
Enhanced Frequency Response Error Correction
13. To compute the reflection correction coefficients, press
14. To start the transmission portion of the correction, press
15. Make a "thru" connection between the points where you will connect your device under test as shown
in Figure 6-7.
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
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.
NOTE If you will be measuring highly reflective devices such as filters, use the test 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
The analyzer displays the corrected measurement trace. The analyzer also shows the notation Cor at
6-24
or
REV TRANS THRU
or
REV MATCH THRU
and select from the following two options:
RESUME CAL SEQUENCE
.
.
DONE ENH RESP CAL
STANDARDS DONE
.
TRANSMISSION
softkey must be selected
USER KIT
ISOLATION FWD or REV
.
.
Cal