Keysight Technologies 11644A K, User'S And Service Manual

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X, P, and K 11644A 4-5
Use, Maintenance, and Care of the Devices
Connections
Connections
Good connections require a skilled operator. Slight errors in operator technique can have a significant
effect on measurements and measurement uncertainties . The most common cause of measurement error
is poor connections.
The following procedures illustrate how to make good connections.
Waveguide Devices
IMPORTANT Unlike threaded devices, the WR-90, WR-62, WR-42 waveguide mating planes are flanges
(often precision) that you must carefully screw together. Always connect waveguide in the
same flange orientation. For example, use the label as a reference and always connect a
device with the label facing the same direction.
Precision Flanges
A precision flange has four corner screw holes and two precision alignment holes, as shown in Figure 4-2 .
A non-precision flange has only four corner screw holes .
Figure 4-2 Precision Alignment Holes