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Installation Procedure for the Upgrade
Reference
a
Type
Designator
W141
SR
W143
SR
a. SR = semirigid coaxial cable.
4. Remove the following gray flexible cables:
— W64 (N5242-60025) A23 mixer brick (R1) to A20 IF multiplexer (P601)
— W65 (N5242-60026) A23 mixer brick (R2) to A20 IF multiplexer (P801)
5. Leave the remaining gray flexible cables, the wire harnesses, and the ribbon cables connected
where possible. Any that are removed should be labeled for reconnection later.
Step 8.Remove the A23 Mixer Brick Assembly
Remove the A23 mixer brick assembly from the PNA. For instructions, click the Chapter 7
bookmark, "Removing and Replacing the A23 and A24 Mixer Bricks" in the PDF Service Guide
Step 9.Assemble the A24 Mixer Brick and A22 Splitter
Refer to
Figure 1
in this document for this step. New parts are listed in
document.
1. Install the A24 mixer brick (5087-7829) to the mounting block by hand-starting three screws
(item
; 0515-1410). Do not tighten.
①
2. Install two screws (item
3. Go back and torque the three screws (item
Figure 1
A24 Mixer Brick Assembly
1. See
"Downloading the Online PNA Service Guide" on page
15
Qty
Description
1
A55 noise downconverter to A7 noise receiver board LO
1
A55 noise downconverter to A7 noise receiver board RF
; 0515-0372) and torque to 9 in-lbs.
➁
; 0515-1410) to 9 in-lbs.
①
7.
Table 1 on page 9
of this
Installation Note N5242-90123
1
.
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