Perform The Lrm Calibration - Agilent Technologies 8719ES User Manual

Calibrating for Increased Measurement Accuracy
LRM Error Correction

Perform the LRM Calibration

1. You must have a LRM calibration kit defined and saved in the USER KIT, as shown in
"Modifying Calibration Kits" on page
NOTE This must be done before performing the following sequence.
2. Press
Cal
CAL KIT
CALIBRATE MENU TRL*/LRM* 2-PORT
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
If loads can be connected to both port 1 and port 2 simultaneously, then the
NOTE
following LRM load measurement can be performed using the
DO BOTH FWD+REV
7. To measure the "LRM LOAD," disconnect the short and connect the LRM load to
PORT1.
8. Press
LINE/MATCH
displayed trace settles, press the softkey corresponding to the load used. If a sliding load
is used, press
SLIDING
.
SLIDE IS SET
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
OMIT ISOLATION
6-56
7-57.
SELECT CAL KIT
softkey.
LN/MATCH1 LOAD
to access the Sliding Load menu. Position the slide and press
softkey label is underlined.
LN/MATCH2 LOAD
.
DONE TRL/LRM
USER KIT RETURN
.
to access the No Loads menu. When the
.
RETURN