Perform The Lrm Calibration - Agilent Technologies 8753ET User Manual

Perform the LRM Calibration

1. You must have a LRM calibration kit defined and saved in the USER KIT, as shown in
Calibration Kits" on page
NOTE This must be done before performing the following sequence.
2. Press
Cal
CAL KIT
CALIBRATE MENU
3. To measure the "LRM THRU," connect the "zero length" transmission line between the two test ports.
4. To make the necessary four measurements, press:
LRMTHRU
5. To measure the "LRM SHORT," connect the short to PORT 1, and press:
S11 REFL LRMSHORT
6. Connect the short to PORT 2, and press:
S22 REFL LRMSHORT
NOTE
If loads can be connected to both port 1 and port 2 simultaneously, then the following LRM
load measurement can be performed using the
7. To measure the "LRM LOAD," disconnect the short and connect the LRM load to PORT1.
8. Press
LINE/MATCH
trace settles, press the softkey corresponding to the load used. If a sliding load is used, press
to access the Sliding Load menu. Position the slide and press
SLIDING
9. When all the appropriate load measurements are complete, the load data is measured and the
LN/MATCH1 LOAD
10. Connect the load to PORT 2 and press
11. Repeat the previous LRM load measurement steps for PORT 2.
12. After the measurement is complete, press:
DONE LINE/MATCH
13. To measure the "ISOLATION" class, press:
ISOLATION
❏ 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.
7-57.
SELECT CAL KIT
TRL*/LRM* 2-PORT
LN/MATCH1 LOAD
softkey label is underlined.
LN/MATCH2 LOAD
.
Calibrating for Increased Measurement Accuracy
USER KIT RETURN
.
DO BOTH FWD+REV
to access the No Loads menu. When the displayed
.
LRM Error Correction
"Modifying
RETURN
softkey.
.
SLIDE IS SET
OMIT ISOLATION
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