Installation and Service Guide N5250-90001 6-9
PNA Series Microwave Network Analyzer System
N5250A
Performance Tests and Checks
System Performance Verification
8. Follow the instructions on the analyze
r for performing a full 2-port calibration.The
parameters for the calibration are setup automatically by the program.
9. At the last step of the calibration sequence it is necessary to make a thru connection. To
make the thru connection, gently slide the right test (port 2) towards the left test head (port 1)
a little bit at a time, while turning the threaded ring on the left head test port connector by
hand onto the cable attached to the right test head. Do not use the threaded ring on the test
port connector to pull the cable into the connector. Repeat this process until the cable is
firmly seated into port 1, then make the threaded ring barely finger tight. Finally use the
torque wrench on the port 1 threaded ring and a backup wrench on the cable to tighten the
connection.
10.When prompted to save the calibration, provide a name for the cal file that will allow you to
reuse the calibration as needed.
11.After completion of the full 2-port calibration, follow the instructions on the analyzer for
performing the system verification. Use the match thru and mismatch thru verification
standards provided with the 85059A 1.0 mm Precision Calibration and Verification kit. Insert
the devices as shown in Figure 6-4. The Match Thru and the Mismatch Thru are very similar in
appearance. The Mismatch Thru has a groove machined around its circumference.
It is recommended
to connect the Verification Standards to the test port
cable on port 2 prior to attempting to connect to port 1. Then follow the
recommended procedure for making a thru connection outlined under
Step 8 above to avoid damaging the cable.
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