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Table D-1
Recommended connector gages
Caring for Connectors
Mechanical Inspection: Connector Gages
Mechanical Inspection: Connector Gages
Even a perfectly clean, unused connector can cause problems if it is mechanically
out of specification. Since the critical tolerances in microwave connectors are on the
order of a few ten-thousandths of an inch, using a connector gage is essential.
Before using any connector for the first time, inspect it mechanically using a
connector gage. How often connectors should be gaged after that depends upon
usage.
In general, connectors should be gaged whenever visual inspection or electrical
performance suggests that the connector interface may be out of specification, for
example due to wear or damage. Connectors on calibration and verification devices
should also be gaged whenever they have been used by someone else or on another
system or piece of equipment.
Precision 3.5mm and SMA connectors should be gaged relatively more often than
other connectors, owing to the ease with which the center pins can be pulled out of
specification during disconnection.
Connectors should also be gaged as a matter of routine - after every 100 connections
and disconnections initially, more or less often after that as experience suggests.
Connector gage kits containing all of the items required are included in many
Agilent calibration kits. They are also available separately. Part numbers are as
follows.
Type
Precision 7mm
(APC-7)
Precision 3.5mm
Precision 2.4mm
Type-N
152
Part Number/Ordering Information
85050-80012
11752D
11752E
85054-60047
Appendix D
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