Agilent Technologies 8753ET User Manual page 346

Calibrating for Increased Measurement Accuracy
Calibrating for Non-Coaxial Devices (ES Analyzers Only)
Perform the TRL Calibration
1. Press
Cal
CAL KIT
CALIBRATE MENU
2. To measure the "TRL THRU," connect the "zero length" transmission line between the two test ports.
3. To make the necessary four measurements, press
4. To measure the "TRL SHORT," connect the short to PORT 1, and press:
S11 REFL: TRLSHORT
5. Connect the short to PORT 2 and press
6. To measure the "TRL LINE," disconnect the short and connect the TRL line from PORT 1 to PORT 2.
7. Press
LINE/MATCH
8. The line data is measured and the
are underlined.
9. To measure the "ISOLATION" class, press
❏ You could choose not to perform the isolation measurement by pressing
DONE TRL/LRM
NOTE You should perform the isolation measurement when the highest dynamic range is desired.
To perform the best isolation measurements, you should reduce the system bandwidth or
activate the averaging function.
A poorly measured isolation class can actually degrade the overall measurement
performance. If you are in doubt of the isolation measurement quality, you should omit the
isolation portion of this procedure.
NOTE If loads can be connected to both port 1 and port 2 simultaneously, then the following
measurement can be performed using the
10. Connect a load to PORT 2, and press
11. Connect the load to PORT 1, and press
12. You may repeat any of the previous steps. There is no requirement to go in the order of steps. When the
analyzer detects that you have made all the necessary measurements, the message line will show
PRESS 'DONE' IF FINISHED WITH CAL. Press
The message COMPUTING CAL COEFFICIENTS will appear, indicating that the analyzer is performing
the numerical calculations of error coefficients.
NOTE You can save or store the measurement correction to use for later measurements. Refer to
Chapter 4 , "Printing, Plotting, and Saving Measurement Results"
13. Connect the device under test. The device S-parameters are now being measured.
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SELECT CAL KIT
TRL*/LRM* 2-PORT
S22 REFL: TRLSHORT
DO BOTH FWD+REV
LN/MATCH1 LINE
ISOLATION
.
REV ISOL'N ISOL'N STD
FWD ISOL'N ISOL'N STD
USER KIT RETURN
.
.
THRU THRU
.
.
and
LN/MATCH2 LINE
.
DO BOTH FWD+REV
.
ISOLATION DONE
DONE TRL/LRM
RETURN
softkey labels
OMIT ISOLATION
softkey.
.
.
for procedures.