User`s guide

6-4 User’s and Service Guide
Service
Performance Tests
Isolation
Isolation needs to be measured only on adjacent ports. Two 50 Ω loads
are required for this test.
Step 1. Recall the full two-port calibration. Make sure the calibration is active
and that averaging is “on” when making measurements.
Step 2. Connect a 50 Ω load to both the Transmission and Reflection ports of
the 87050A Option K24.
Step 3. Connect the two cables that are attached to the network analyzer to
Ports 1 and 2 of the 87050A Option K24. The exact order does not
matter.
Step 4. Select Reflection Port 1 and Transmission Port 2. Set the 8720D to
measure Transmission. Record the results in the Performance Test
Record, Table 6-3 beginning on page 6-14.
Step 5. Repeat steps 3 and 4 for the next two adjacent ports; 2 and 3. Repeat
again for ports 3 and 4, then 4 and 5, and so on, ending with ports 23
and 24.