Keysight Technologies N5221BU-4S7, Руководство пользователя

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Installation Note N5222-90133 27
Description of this Upgrade
Step 10. Reinstall Bottom Assemblies and Cables
E. Reinstall Some Bottom Cables
Install the New Test Set Semi-rigid Cables
To see an image showing the location of these cables, refer to Figure 13 on
page 28 . See also the Chapter 6 bookmarks “Bottom RF Cables, 4-port
Configuration [for your option]” in the PDF Service Guide. New parts are listed
in Table on page 8 .
All connectors are torqued to 9 in-lbs.
Install the following new cable:
Refer to
Figure 13 on page 28 .
—
①
—W41 (N5240-20122) A11 13.5 GHz (LO) DD synthesizer assembly J5 to
A21 HMA26.5 RF IN (The other end will be connected in “Step 12. Install
*NEW* A11 Direct Digital Synthesizer (DDS) Assembly” on page 30 .)
Follow instructions carefully when making cable connections, especially
wire harness connections. Incorrect connections can destroy components,
resulting in additional customer costs.
Be careful not to damage the center pins of the semi-rigid cables. Some
flexing of the cables may be necessary but do not over-bend them.
To avoid damage when connecting and torquing the bias T combiner
semirigid cables, always use a wrench to hold the bias T combiner
connectors.
Use a 5/16-in torque wrench set to 10 in-lbs on all cable connections
except the front and rear panel bulkhead connectors. On these, use a
9 mm nutsetter or open end torque wrench set to 21 in-lb.