Anritsu MA24 A Series, Operation Manual, Page: 42 / 88

4-2 PN: 10585-00004 Rev. U MA24xxA/B/D, MA2400xA OM
4-3 SWR Performance Chapter 4 — Performance Verification
The other most common cause of power sensor problems is
damaged connectors. Connections should be tightened with the
proper torque wrench applied to the coupling nut only. Any
attempt to torque or untorque a connection using the body of the
power sensor may result in either connector damage, or in the
connector becoming unthreaded from the body.
Since the connector-to-body threads have thread-locking
compound applied, slight unthreading of the connector from the
body may not be physically apparent. Unthreaded or damaged
connectors will change the voltage versus power relationships.
These changes are usually manifested as a poor input match.
Any suspect power sensor should have two parameters tested:
• SWR (magnitude of reflection coefficient)
• Sensitivity
4-3 SWR Performance
Power sensor SWR performance (in terms of reflection coefficient
magnitude) is tested in this section. SWR values for each sensor model
are listed in
Appendix B, “Specifications” . The uncertainty of the SWR
performance of the power sensors is determined by using the Anritsu
37000 Vector Network Analyzer and 54000 Scalar Measurement
systems.
Refer to the
“SWR Performance Data” tables in Appendix A to record
test data.
Required Equipment
• Anritsu 37000 Vector Network Analyzer
• Anritsu 54000 Scalar Network Analyzer
Note
There are no user serviceable parts inside the power
sensors. Contact your local Anritsu Service Center and
return the power sensor with a detailed description of the
observed problems.
Note
The SWR performance data in the tables of
Appendix A is
expressed in reflection coefficient magnitude.