14 Installation Note N5222-90119
Installation Procedure for the Upgrade
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Step 3. Remove the Inner Cover
For instructions, click the Chapter 7 bookmark “Removing the Covers” in the
PDF Service Guide1.
Step 4. Remove the Front Panel Assembly
For instructions, click the Chapter 7 bookmark “Removing and Replacing the
Front Panel Assembly” in the PDF Service Guide
Step 5. Remove the A23 Test Set Motherboard
For instructions, click the Chapter 7 bookmark “Removing and Replacing the
A23 test set motherboard” in the PDF Service Guide1.
Step 6. Remove Some Bottom-Side (Test Set) Cables
1. Place the analyzer bottom-side up on a flat surface.
2. Remove the following cables. To see an image showing the location of
these cables, click the Chapter 6 bookmark “Bottom RF Cables, Standard
2-Port Configuration, Option 200” in the PDF Service Guide
1
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These cables may be discarded - they will not be reinstalled.
— W42 (N5222-20073) A21 HMA26.5 to A23 mixer brick
— W48 (N5222-20003) A33 reference mixer switch to A23 mixer brick (R1)
— W74 (N5222-20072) A38 port 1 bias tee to A29 port 1 coupler
— W14 (N5222-20070) A29 port 1 coupler to front-panel Port 1 CPLR ARM
— W66 (N5222-20065) A41 port 2 bias tee to A32 port 2 coupler
— W26 (N5222-20071) A32 port 2 coupler to front-panel Port 2 CPLR ARM
These cables must be saved - they will be reinstalled.
— W4 (N5222-20040) W3 to A25 port 1 receiver coupler
— W10 (N5222-20043) W9 to A24 port 2 receiver coupler
— W88 (N5222-20004) A42 port 1 receiver attenuator to A23 mixer brick
(A)
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.
When removing a cable, also remove the plastic cable clamp, if present. It
is normal for some of the cable clamp’s adhesive to remain.
1. See