Fluke 9640A Series, Instruction Manual

Page: 80 / 324

9640A
Instruction Manual
3-32
Leveling Head
SMA Connector
Torque to 0.45 Nm (4 in-lb)
ead46f.eps
Figure 3-5. Connecting the Leveling Head
Connecting a Leveling Head to a Unit Under Test
The Instrument relies on either a 50
Ω
or a 75
Ω
Leveling Head to maintain the integrity
of the output signal. Both Leveling Heads use N connectors to connect to the input of the
UUT.
Connecting the Leveling Head to a UUT is a straightforward, but critical, process. Before
making the connection, to avoid damage to the instruments involved and to ensure
measurement integrity read and observe the following cautions and warnings,.
W
Caution
To prevent damage to the N connector on the Fluke 9640A-xx
Leveling Heads, use a sacrificial adapter when making frequent
connections or connections to low-quality N connectors.
W
Caution
Reliable and repeatable interconnections are only achieved at
the specified torque setting of 1.00 Nm (9 in-lb). Performance
will be impaired if torque settings are not observed, and
permanent connector damage is likely to result from over-
tightening.