Care and Handling of Precision Connectors
Accuracy Considerations
2-6
Figure 2-2
Typical SWR of SMA and Precision 3.5 mm Connectors
Accuracy Considerations
Accuracy requires that 3.5 mm precision connectors be used. However, SMA
connectors can be used if special care is taken when mating the two, and all
connectors are undamaged and clean. Before each use, the mechanical
dimensions of all connectors must be checked with a connector gauge to make
sure that the center conductors are positioned correctly. All connections must
be made for consistent and repeatable mechanical (and therefore electrical)
contact between the connector mating surfaces.
Carefully study and practice all procedures in this chapter until you can
successfully perform them repeatedly. Accuracy and repeatability are critical
for good high frequency measurements. Note that the device connection
procedures differ in several important ways from traditional procedures used
in the industry. Hewlett-Packard procedures have been developed through
careful experimentation.
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