Option H48 Multiport Test Set User's and Service Guide

Agilent Technologies Z5623A Option H48 5 -39

Performance Verification

Verifying Crosstalk Specs

Crosstalk need only be measured on adjacent ports. Two 50 Ω shorts

are required for this test.

Step 1. Connect an RF cable from Port 1 of the network analyzer to the

Reflection Port of the test set. Connect another RF cable from Port 2 of

the network analyzer to the Transmission Port of the test set. Connect a

third RF cable from Test Port 1 to Test Port 8. See Figure 5-40.

Figure 5-40 Setup for Measuring Crosstalk of Test Set

Step 2. Issue the “*rst;” command to the test set.

Step 3. Recall the limit test file for crosstalk. It is listed in Table 5-3 on

page 5-7.

Step 4. Normalize the S21 and S12 through response.

Step 5. Remove the RF cable between Test Ports 1 and 8.

Step 6. Put shorts on Test Ports 1 and 2.

Step 7. Command the test set to connect the Reflection Port to the first of the

test ports having a short. Command the test set to connect the

Transmission Port to the other test port having a short.

Step 8. Read the results of the crosstalk test on the screen of the network

analyzer. Record the results in Table 5-9.

E8358A

(300 kHz - 9.0 GHz)

Port 1 Port 2

Reflection Transmission

GPIB