Agilent Technologies 8719ES 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 SELECT 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
labels are underlined.
9. To measure the "ISOLATION" class, press
You could choose not to perform the isolation measurement by pressing
OMIT ISOLATION
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
softkey.
10.Connect a load to PORT 2, and press
11.Connect the load to PORT 1, and press
ISOLATION DONE
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
DONE TRL/LRM
The message COMPUTING CAL COEFFICIENTS will appear, indicating that the analyzer is
performing the numerical calculations of error coefficients.
6-52
TRL*/LRM* 2-PORT
DO BOTH FWD+REV
LN/MATCH1 LINE
DONE TRL/LRM
REV ISOL'N ISOL'N STD
.
.
USER KIT RETURN
.
THRU THRU
S22 REFL: TRLSHORT
.
and
LN/MATCH2 LINE
.
ISOLATION
.
FWD ISOL'N ISOL'N STD
RETURN
.
.
softkey
DO BOTH FWD+REV
.