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

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4-8 X, P, and K 11644A
Use, Maintenance, and Care of the Devices
Connections
Tightening a Flange Connection
NOTE The best connection has symmetrical pressure applied as you gradually tighten the screws.
1. In an “X” pattern (for equal compression), tighten all four screws using a hex ball driver. Do not
over-tighten. See Figure 4-6 .
2. Visually inspect the connection. Refer to the following section “Inspecting a Flange Connection”
Figure 4-6 “X” Screw Pattern
Inspecting a Flange Connection
Inspect the flange connection as follows:
1. Place an electric light or white paper behind the connection.
2. Check the flange matings for any gap. A good connection has no gaps between the connected
waveguide flanges, and the waveguide walls are flush. There is no step or offset.
3. Ensure that all four screws are equally tight.
NOTE The most common cause of measurement error is a poor connection.