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SMA Connectors
Good connections are essential for accurate calibrations and measurements and
require a skilled operator. The most common cause of measurement error is poor
connections. The following information is for use when connecting the two
Waveform Generator cables to the DPT Test Fixture and when connecting the
BNC-SMA cable to the PD1000-60002 Protection Probe. IMPORTANT: proper
connection can help prevent ringing during a DPT test.
SMA connectors mate with 2.92 and 3.5 mm connectors. However, a damaged
SMA connector, or a used SMA connector with a slightly bent pin can destroy a
2.92 or 3.5 mm connector. In SMA connectors, the center pin connects first,
before the threads. If an SMA pin is bent or off-center for any reason, then the pin
will make contact with the 2.92/3.5 mm female contacts which are unsupported
as an air dielectric is used, and the female contact may be pushed out of place.
1 Ground yourself and all devices. Wear a grounded wrist strap and work on a
2 Visually inspect the connectors. If necessary, clean the connectors.
3 Carefully align the connectors. As you make the actual connection, be sure
4 Push the connectors straight together. Do not twist or screw the connectors
5 Engage the connector nut (of the connector with the retracted sleeve) over
6 Do not over tighten this connection. A connection in which the outer
7 Make sure the connectors are properly supported. Relieve any side pressure
8 Torque the connection according to the procedures described below.
Keysight PD1000A Power Device Measurement System
grounded, conductive table mat.
the connectors align perfectly.
together.
the threads of the other connector (the connector with the extended sleeve).
Turn only the connector nut. Let the connector nut pull the two connectors
straight together.
conductors make gentle contact at all points on both mating surfaces is
sufficient. Very light finger pressure is enough to accomplish this.
on the connection from long or heavy devices or cables.
SMA Connectors
91
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