Technical data

50 User’s and Service Guide
87050A Option K22 Performance Tests
Isolation
Isolation need only be measured on adjacent ports. Two 50 Ω loads are required for this
test.
Step 1. Recall full 2-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 A i/p 2 and B i/p 2 ports of the 87050A
Option K22.
Step 3. Connect the two cables that are attached to the network analyzer to
ports 1 and 2
of the 87050A Option K22. The exact order does not matter.
Step 4. Using the “CONTROL” program provided, select reflection port 1 and
transmission port 2. e.g. “2,1,2,2” (you could also use “2,2,2,1”). Set the 8720D to
measure transmission. Verify using Table 5 on page 47. Record the test results on
the appropriate line in Table 8 on page 54.
Step 5. Repeat step 3 and step 4 for the next two adjacent ports; 2 and 3. Make
sure the appropriate “CONTROL” inputs are selected. Repeat again for
ports 3 and 4, then 4 and 5, and so on, ending with ports 11 and 12.