Keysight N5241BU-622, Installation Note

Page: 15 / 42

15 Installation Note N5242-90123
Installation Procedure for the Upgrade
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
1
.
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 Table 1 on page 9 of this
document.
1. Install the A24 mixer brick (5087-7829) to the mounting block by hand-starting three screws
(item
①
; 0515-1410). Do not tighten.
2. Install two screws (item
➁
; 0515-0372) and torque to 9 in-lbs.
3. Go back and torque the three screws (item
①
; 0515-1410) to 9 in-lbs.
Figure 1 A24 Mixer Brick Assembly
W141 SR 1 A55 noise downconverter to A7 noise receiver board LO
W143 SR 1 A55 noise downconverter to A7 noise receiver board RF
a. SR = semirigid coaxial cable.
1. See “Downloading the Online PNA Service Guide” on page 7 .
Reference
Designator
Type
a
Qty Description