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20
Connector Care and Preventive Maintenance
Using, Inspecting, and Cleaning RF Connectors
Connector Wear and
Damage
SMA Connector
Precautions
Cleaning Procedure
20-4
E5500 Phase Noise Measurement System Version A.02.00
CAUTION:
Never exceed the recommended torque when attaching cables.
Table 20-1 Proper Connector Torque
Connecto
Torque
r
cm-kg
Type-N
52
2.4 mm
9.2
3.5 mm
9.2
SMA
5.7
Look for metal particles from the connector threads and other signs
of wear (such as discoloration or roughness). Visible wear can affect
measurement accuracy and repeatability. Discard or repair any
device with a damaged connector. A bad connector can ruin a good
connector on the first mating. A magnifying glass or jeweler's loupe
is useful during inspection.
CAUTION:
Use caution when mating SMA connectors to any precision 2.4
mm or 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 2.4 mm or 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.
1
Blow particulate matter from connectors using an
environmentally-safe aerosol such as Ultrajet. This product is
recommended by the United States Environmental Protection
Agency and contains chlorodifluoromethane. You can order this
aerosol from Agilent Technologies (see
2
Use an alcohol wipe to wipe connector surfaces. Wet a small swab
with alcohol (from the alcohol wipe) and clean the connector
with the swab.
Torque N-cm
Torque
in-lbs
508
45
90
8
90
8
56
5
Table
Document Part No. E5500-90024 Ed. 1.0
Wrench Part Number
8710-1935
8720-1765
8720-1765
8710-1582
20-2).
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