358 N5511A Phase Noise Test System User’s Guide
Preventive Maintenance
Using, Inspecting, and Cleaning RF Connectors
Using, Inspecting, and Cleaning RF Connectors
Taking proper care of cables and connectors will protect your system’s ability
to make accurate measurements. One of the main sources of measurement
inaccuracy can be caused by improperly made connections or by dirty or
damaged connectors.
The condition of system connectors affects measurement accuracy and
repeatability. Worn, out-of-tolerance, or dirty connectors degrade these
measurement performance characteristics.
Repeatability
If you make two identical measurements with your system, the differences
should be so small that they will not affect the value of the measurement.
Repeatability (the amount of similarity from one measurement to another of the
same type) can be affected by:
— Dirty or damaged connectors
— Connections that have been made without using proper torque techniques
(this applies primarily when connectors in the system have been
disconnected, then reconnected).
RF Cable and Connector Care
Connectors are the most critical link in a precision measurement system. These
devices are manufactured to extremely precise tolerances and must be used
and maintained with care to protect the measurement accuracy and
repeatability of your system.
To extend the life of your cables or connectors:
— Avoid repeated bending of cables—a single sharp bend can ruin a cable
instantly.
— Avoid repeated connection and disconnection of cable connectors.
— Inspect the connectors before connection; look for dirt, nicks, and other
signs of damage or wear. A bad connector can ruin the good connector
instantly.
— Clean dirty connectors. Dirt and foreign matter can cause poor electrical
connections and may damage the connector.
— Minimize the number of times you bend cables.
Static-Sensitive Devices - This system contains instruments and devices that are static-sensitive.
Always take proper electrostatic precautions before touching the center conductor of any
connector, or the center conductor of any cable that is connected to any system instrument.
Handle instruments and devices only when wearing a grounded wrist or foot strap. When
handling devices on a work bench, make sure you are working on an anti-static worksurface.
Summary of Contents for N5511A
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