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6
Preventive Maintenance
SMA Connector Precautions
Use caution when mating SMA connectors to any precision 3.5 mm RF
connector. SMA connectors are not precision devices and are often out of
mechanical tolerances, even when new. An out- of- tolerance SMA
connector can ruin a 3.5 mm connector on the first mating. If in doubt,
gauge the SMA connector before connecting it. The SMA center conductor
must never extend beyond the mating plane.
Cleaning Procedure
1
2
3
Do not allow excessive alcohol to run into the connector. Excessive alcohol entering
C A U T I O N
the connector collects in pockets in the connector's internal parts. The liquid will
cause random changes in the connector's electrical performance. If excessive
alcohol gets into a connector, lay it aside to allow the alcohol to evaporate. This may
take up to three days. If you attach that connector to another device it can take
much longer for trapped alcohol to evaporate.
74
Blow particulate matter from connectors using an environmentally- safe
aerosol such as Aero- Duster. (This product is recommended by the
United States Environmental Protection Agency and contains
tetrafluoroethane. You can order this aerosol from Agilent (see
Table
14).)
Use alcohol and a lint- free cloth to wipe connector surfaces. Wet a
small swab with a small quantity of alcohol and clean the connector
with the swab.
Allow the alcohol to evaporate off of the connector before making
connections.
E5505A Installation Guide
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