Keysight N5247-60113, Installation Manual

Page: 41 / 76

Installation Note N5247-90113 41
Installation Procedure for the Upgrade
Step 19. Install the New Bias Tee Combiner’s Semirigid Test Set
Cables, the Blue cables, and Install the Cable Clamps Onto the Ferrite
Beads
This step contains the following:
— “Install the New Semirigid Test Set Cables” on page 41
— “Install New Blue Bias-Tee Combiner Cables and Clamps N5240-60097
From the A71–A74 Bias Tees “RF-IN” to the A70 LFE Board
“Port1”–“Port4” Connectors” on page 48
— “Install clamps onto the Ferrite Beads” on page 49
Install the New Semirigid Test Set Cables
Refer to Figure 21 on page 43 through Figure 30 on page 57 for this step of the
procedure. Although only Option 423 is shown in the illustrations, Option 425
is similar in appearance. To see an image showing the location of these cables,
click the appropriate Chapter 6 bookmark (e.g., “4-Port Configuration, Options
425/029 ( S/N Prefixes
<
6021)” or “4-Port Configuration, Options 425/029
( S/N Prefixes
≥
6021)”) in the PDF Service Guide
1
. New parts are listed in
Table 1 on page 11 .
Unless otherwise specified, use a 5/16-in torque wrench set to 10 in-lbs on
all cable connections (i.e., except for the cable ends that connect to the
couplers, torque these to 8 in-lbs. Refer to Figure 22 on page 44 through
Figure 25 on page 48 ).
And, the front and rear panel bulkhead connectors use a 9 mm nutsetter or
open end torque wrench set to 21 in-lb.
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 semirigid 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.
1. See “Downloading the Online PNA Service Guide” on page 8 .