Agilent Technologies 8753ET User Manual page 64

Making Measurements
Characterizing a Duplexer (ES Analyzers Only)
this example, a wide frequency range that covers both the Tx-Ant and Ant-Rx parameters has been
chosen.
4. Uncouple the primary channels from each other and then press
COUPLED CH on OFF
5. Press
CONFIGURE MENU
System
6. Set up the desired mode.
• For K36 mode, toggle
• For K39 mode, toggle
SELECT PORTS [1-3]
7. Perform a full two-port calibration on channel 1 (refer to
Measurement Accuracy,"
NOTE Make sure you connect the standards to the Tx port of the test adapter (or a cable attached
to it) for FORWARD calibrations, and to the Ant port for REVERSE calibrations.
8. Save the instrument state by pressing
9. Press .
Chan 2
10. Set up channel 2 for the Ant-Rx stimulus parameters. In this example, a wide frequency range that
covers both the Tx-Ant and Ant-Rx parameters has been chosen.
11. Set up control of the test adapter so that channels 2 and 4 are Rx:
• For K36 mode, press
• For K39 mode, press
12. Perform a full two-port calibration on channel 2.
NOTE Make sure you connect the standards to the Rx port of the test adapter (or a cable attached
to it) for FORWARD calibrations, and to the Ant port for REVERSE calibrations.
13. Save this state in the analyzer:
Press Save/Recall SAVE STATE
14. Connect the duplexer to the test adapter.
15. Set up a 2-graticule, 4-parameter display with transmission measurements on the top graticule and
reflection measurements on the bottom graticule:
Press Display DUAL|QUAD SETUP
Trans: REV S12 (A/R)
Chan 4 Refl: REV S22 (B/R)
Refl: FWD S11 (A/R)
The display will be similar to
1-50
to OFF .
USER SETTINGS
K36 MODE on OFF
K39 MODE on OFF
.
if necessary).
Save/Recall SAVE STATE
SELECT [RX-ANT]
Meas
Meas SELECT PORTS [2-3]
.
4-PARAM DISPLAYS
Chan 1 Trans:FWD S21 (B/R)
, then set DUAL CHAN on OFF
Figure 1-41.
Sweep Setup
.
to ON. Then, press
Meas
to ON. Then, press
Meas
Chapter 6 , "Calibrating for Increased
.
.
.
SETUP B
to ON .
and toggle
SELECT [TX-ANT]
Meas
Chan 3
.