Keysight N5224BU-617 User manual

Installation Note
Keysight Add 4-Port Capability
Upgrade Kit
To Upgrade PNA N5224B or N5225B Option 217 to
Option 417
Upgrade Kit Order Number: N5224BU-617 or
N5225BU- 617
Keysight Kit Number: N5225-60118

Notices
© Keysight Technologies, Inc. 2011 –
2018
No part of this manual may be
reproduced in any form or by any
means (including electronic storage
and retrieval or translation into a
foreign language) without prior
agreement and written consent from
Keysight Technologies, Inc. as
governed by United States and
international copyright laws.
Trademark Acknowledgments
Manual Part Number
N5225-90118
Edition
Edition 1, November 2018
Printed in USA/Malaysia
Published by:
Keysight Technologies
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Warranty
THE MATERIAL CONTAINED IN THIS
DOCUMENT IS PROVIDED “AS IS,”
AND IS SUBJECT TO BEING
CHANGED, WITHOUT NOTICE, IN
FUTURE EDITIONS. FURTHER, TO
THE MAXIMUM EXTENT PERMITTED
BY APPLICABLE LAW, KEYSIGHT
DISCLAIMS ALL WARRANTIES,
EITHER EXPRESS OR IMPLIED WITH
REGARD TO THIS MANUAL AND
ANY INFORMATION CONTAINED
HEREIN, INCLUDING BUT NOT
LIMITED TO THE IMPLIED
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FOR ERRORS OR FOR INCIDENTAL
OR CONSEQUENTIAL DAMAGES IN
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PERFORMANCE OF THIS
DOCUMENT OR ANY INFORMATION
CONTAINED HEREIN. SHOULD
KEYSIGHT AND THE USER HAVE A
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COVERING THE MATERIAL IN THIS
DOCUMENT THAT CONFLICT WITH
THESE TERMS, THE WARRANTY
TERMS IN THE SEPARATE
AGREEMENT WILL CONTROL.
Technology Licenses
The hardware and/or software
described in this document are
furnished under a license and may be
used or copied only in accordance
with the terms of such license.
U.S. Government Rights
The Software is “commercial
computer software,” as defined
by Federal Acquisition Regulation
(“FAR”) 2.101. Pursuant to FAR
12.212 and 27.405-3 and
Department of Defense FAR
Supplement (“DFARS”) 227.7202,
the U.S. government acquires
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Accordingly, Keysight provides
the Software to U.S. government
customers under its standard
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embodied in its End User License
Agreement (EULA), a copy of
which can be found at
http://www.keysight.com/find/sweula
The license set forth in the EULA
represents the exclusive authority
by which the U.S. government
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and the license set forth therein,
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among other things, that
Keysight: (1) Furnish technical
information related to
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set forth specifically in writing
elsewhere in the EULA. Keysight
shall be under no obligation to
update, revise or otherwise
modify the Software. With
respect to any technical data as
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to FAR 12.211 and 27.404.2 and
DFARS 227.7102, the U.S.
government acquires no greater
than Limited Rights as defined in
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(c), as applicable in any technical
data.
Safety Notices
A CAUTION notice denotes a hazard. It
calls attention to an operating
procedure, practice, or the like that,
if not correctly performed or adhered
to, could result in damage to the
product or loss of important data. Do
not proceed beyond a CAUTION
notice until the indicated conditions
are fully understood and met.
A WARNING notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that,
if not correctly performed or adhered
to, could result in personal injury or
death. Do not proceed beyond a
WARNING notice until the indicated
conditions are fully understood and
met.

3

4

5
Keysight Add 4-Port Capability Upgrade Kit
Upgrade Kit Number: N5225-60118
Installation Note
Description of the Upgrade
This upgrade converts your N5224B or N5225B Option 217 2-port analyzer to
an N5224B or N5225B Option 417 4-port analyzer by adding:
— an additional 26.5 GHz source board
— an additional 13.5 GHz source synthesizer board
— two additional 40 GHz doublers
—anadditionalmixerbrick
— two additional receiver couplers and brackets
— two additional test port couplers
— two additional source attenuators and brackets
— two additional receiver attenuators and brackets
— an additional cable guard for front panel jumpers
—asplitter
— a 3 dB pad
— a modified front panel
— new cables

6 Installation Note N5225-90118
Getting Assistance from Keysight
-
Getting Assistance from Keysight
Installing this upgrade kit requires special skills and experience. If you think
you may not be qualified to do the work, or need advice, contact Keysight.
Contacting Keysight
Assistance with test and measurements needs and information on finding a
local Keysight office are available on the Web at:
http://www.keysight.com/find/assist
If you do not have access to the Internet, please contact your Keysight field
engineer.
If You Have Problems With the Upgrade Kit Contents
Keysight stands behind the quality of the upgrade kit contents. If you have
problems with any item in the kit, refer to www.keysight.com and the Contact
Keysight link.
In any correspondence or telephone conversation, refer to the Keysight
product by its model number and full serial number. With this information,
the Keysight representative can determine whether your product is still
within its warranty period.

Installation Note N5225-90118 7
Getting Prepared
Getting Prepared
To successfully install this upgrade kit, you will need the following:
—Alicensekey-referto“License Key Redemption” below.
— A PDF copy or a paper copy of the PNA Service Guide - refer to
“Downloading the Online PNA Service Guide” below.
— An ESD-safe work area - refer to “Protecting Your Workspace from
Electrostatic Discharge” below.
— Correct tools - refer to “Tools Required for the Installation” on page 9.
— Enough time - refer to “About Installing the Upgrade” on page 9.
— Test equipment for the post-upgrade adjustments and full instrument
calibration. To view the equipment list, click the Chapter 3 bookmark “Tests
and Adjustments” in the PDF Service Guide1.
License Key Redemption
To enable the option product(s), you must request license key(s) file from the
Keysight Software Manager:
http://www.keysight.com/find/softwaremanager:
To complete the request, you will need to gather the following information:
— From the certificate
— Order number
— Certificate number
— From your instrument
The PNA contains extremely sensitive components that can be ruined if
mishandled. Follow instructions carefully when making cable connections,
especially wire harness connections.
The person performing the work accepts responsibility for the full cost of
the repair or replacement of damaged components.
1. See “Downloading the Online PNA Service Guide” on page 8.
If you are unfamiliar with the licensing process, refer to the
http://literature.cdn.keysight.com/litweb/pdf/N5242-90024.pdf.
The enclosed Software Entitlement Certificate is a receipt, verifying that
you have purchased a licensed option for the PNA of your choice. You must
now use a Keysight Web page to request a license key file for the
instrument that will receive the option.

8 Installation Note N5225-90118
Getting Prepared
-
(Instrument information is available in the network analyzer - on the
toolbar, click Help, then click About Network Analyzer.)
— Model number
— Serial number
Using the information just gathered, you must request license key(s) from the
Keysight Software Manager:
http://www.keysight.com/find/softwaremanager.
You will need to provide an email address, to which Keysight will promptly
email your license key file. Refer to “License Key Redemption” on page 7.
Verify the License Contents
Refer to the license message you received from Keysight:
If the model number, serial number, or option number do not match those on
the license message you received from Keysight, you will not be able to install
the license key file. If this is the case you received from Keysight, you will not
be able to install the license key file. If this is the case, contact Keysight for
assistance. Refer to “Getting Assistance from Keysight” on page 6.
Downloading the Online PNA Service Guide
To view the online Service Guide for your PNA model number, use the following
steps:
1. Go to www.keysight.com.
2. In the Search box, enter the model number of the analyzer (Ex: N5224B)
and click Search.
3. Click Technical Support > Manuals.
4. Click Service Manual.
5. Click the service guide title to download the PDF file.
6. When the PDF of the Service Guide is displayed, scroll through the
Contents section bookmarks to locate the information needed.
Protecting Your Workspace from Electrostatic Discharge
For information, click on the Chapter 1 bookmark, “Electrostatic Discharge
Protection” in the PDF Service Guide1.
1. “Downloading the Online PNA Service Guide” on page 8.

Installation Note N5225-90118 9
Getting Prepared
ESD Equipment Required for the Installation
Tools Required for the Installation
About Installing the Upgrade
Description Keysight Part Number
ESD grounding wrist strap 9300-1367
5-ft grounding cord for wrist strap 9300-0980
2 x 4 ft conductive table mat and 15-ft grounding wire 9300-0797
ESD heel strap (for use with conductive floors) 9300-1308
Description Qty Part Number
T-6 TORX driver - set to 4 in-lbs (0.45 N.m) 1 N/A
T-8 TORX driver - set to 6 in-lbs (0.68 N.m) 1 N/A
T-10 TORX driver - set to 9 in-lbs (1.02 N.m) 1 N/A
T-20 TORX driver - set to 21 in-lbs (2.38 N.m) 1 N/A
5/16-in (8 mm) nutsetter or open end torque wrench- set to 10 in-lbs
(1.13 N.m)
1N/A
3/16-in (5 mm) nutsetter or open end torque wrench - set to 6 in-lbs
(0.68 N.m)
1N/A
5/8-in (16 mm) nutsetter or open end torque wrench - set to 21 in-lbs
(2.38 N.m)
1N/A
9 mm nutsetter or open end torque wrench - set to 21 in-lbs (2.38 N.m) 1 N/A
1-in (25.4 mm) torque wrench - set to 72 in-lbs (8.15 N.m) 1 N/A
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 5/16
inch nutsetter or open end torque wrench set to 21 in-lb.
Products affected N5224B or N5225B Option 217
Installation to be performed by Keysight service center or personnel qualified by Keysight
Estimated installation time 5 hours
Estimated adjustment time 0.5 hours
Estimated full instrument calibration time 4.5 hours

10 Installation Note N5225-90118
Items Included in the Upgrade Kit
-
Items Included in the Upgrade Kit
Check the contents of your kit against the following list. If any part is missing or
damaged, contact Keysight Technologies. Refer to “Getting Assistance from
Keysight” on page 6.
Table 1 Contents of Upgrade Kit N5225-60118
Ref
Desig. Description Qty Part Number
- Installation note (this document) 1 N5225-90118
- Software Entitlement Certificate 1 5964-5145
A10 26.5 GHz source (2) board 1 5087-7342
A12 40 GHz doubler assembly port 3 2 5087-7349
A13 40 GHz doubler assembly port 4
A17 13.5 GHz (source 2) synthesizer board 1 N5240-60074
A26 Splitter 1 5067-4086
A28 Mixer brick (2) 1 5087-7323
A30 Test port 3 reference coupler 2 5087-7760
A31 Test port 4 reference coupler
A34 Test port 3 coupler 2 5087-7793
A35 Test port 4 coupler
A39 Test port 3 source attenuator 2 33325-60022
A40 Test port 4 source attenuator
A47 Test port 3 receiver attenuator 2 33325-60023
A48 Test port 4 receiver attenuator
- Machine screw, M3.0 x 6, flat head (to attach front frame to coupler plate) 2 0515-1946
- Machine screw, M2.0 x 6, flat head (8 to attach two reference couplers to brackets) 8 0515-1602
-Machine screw, M2.5 x 20, pan head (4 to attach A34 and A35 reference coupler
assemblies to test set deck) 4 0515-0374
-
Machine screw, M4.0 x 10, pan head (2 each to attach the following boards to the
analyzer chassis: A17 13.5 GHz synthesizer board, A10 26.5 GHz source board, A12
40 GHz doubler assembly port 3, and A13 40 GHz doubler assembly port 4.)
7 0515-0380
-
Machine screw, M3.0 x 6, pan head (4 to attach A47 and A48 receiver attenuator
assembly to test set deck; 4 to attach A39 and A40 source attenuator assembly to
test set deck.
8 0515-0430
- Machine screw, M3.0 x 12, pan head (1 to attach cable bracket to test set deck. 2 0515-0664

Installation Note N5225-90118 11
Items Included in the Upgrade Kit
-Machine screw, M3.0 x 8, pan head (3 to attach shield to A28 mixer brick; 8 to attach
two src attn and two rcvr attn to brackets) 12 0515-0372
- Machine screw, M2.5 x 16, pan head (2 to attach splitter to mixer brick) 2 0515-2007
- Machine screw, M3.0 x 25, pan head (3 to attach A28 mixer brick to block) 2 0515-0667
- Machine screw, M3.0 x 20, flat head (2 to attach bracket to A10 26.5 GHz source) 2 0515-2078
- Machine screw, M3.0 x 18, pan head (1 to attach bracket to A10 26.5 GHz source) 1 0515-0666
- Cable tie 5 1400-0249
- Cable clamp 10 1400-1334
- Dust caps for test ports 2 1401-0214
- Test set front plate, 4-port 1 N5224-00005
- Front panel overlay (label), 4-port 1 N5225-80006
- Dress panel, lower 4-port 1 N5240-00009
- 2.4 mm dust cap for A28 mixer brick 1 N5247-20138
- Gap pad (between mixer brick A28 and shield) 4 N5245-20125
- Gap pad (between each test coupler and the test set front plate) 4 E4403-20033
- Shield, mixer brick 1 N5245-00023
A69 3 dB pad, attached to R4 connector on A28 mixer brick 1 08490-60039
- 50 ohm load, attached to A13 40 GHz doubler 1 1250-4261
- Vibration mount (between couplers 1 & 3, and 2 & 4) 2 0460-2725
- Mounting nuts (for port 3 & 4 test port couplers) 2 5022-1087
- Cable guard, center jumper cables 1 N5242-00049
- Cable clamp, 1 to secure W25 (N5245-20116); 1 to secure W29 (N5245-20117). 6 1400-1334
- Cable tie wrap, 1 to secure W44 (N5245-20020); 1 to secure W21 (N5245-20008). 6 1400-0249
- Bracket for reference coupler 2 N5245-00017
- Bracket for cables 1 N5245-00022
- Bracket for receiver attenuator and source attenuator 4 N5245-00015
- Bracket for A10 26.5 GHz source (2) board 1 N5247-20136
W2 RF cable, A10 source (2) P1 to A17 13.5 GHz source (2) synthesizer J1207
(4-port) 1 N5245-20100
W7 RF cable, A10 source (2) P5 to A12 port 3 doubler 1 N5245-20034
Table 1 Contents of Upgrade Kit N5225-60118
Ref
Desig. Description Qty Part Number

12 Installation Note N5225-90118
Items Included in the Upgrade Kit
-
W8 RF cable, A10 source (2) P3 to A13 port 4 doubler 1 N5245-20035
W9 RF cable, A10 source (2) P4 to A12 port 3 doubler 1 N5245-20032
W10 RF cable, A12 port 3 doubler to A13 port 4 doubler 1 N5245-20033
W13 RF cable, A12 port 3 doubler to W14 1 N5245-20036
W14 RF cable, A30 port 3 receiver coupler to W13 1 N5245-20043
W15 RF cable, A13 port 4 doubler to W16 1 N5245-20036
W16 RF cable, A31 port 4 receiver coupler to W15 1 N5245-20044
W20 RF cable, Front panel port 1 CPLR THRU to A33 port 1 coupler 1 N5245-20099
W21 RF cable, A29 port 1 receiver coupler to A37 reference mixer switch 1 N5245-20008
W22 RF cable, A33 port 1 coupler to front-panel Port 1 CPLR ARM 1 N5245-20014
W24 RF cable, Front panel port 3 CPLR THRU to A34 port 3 coupler 1 N5245-20098
W25 RF cable, A30 port 3 receiver coupler to front-panel REF 3 SOURCE 1 N5245-20116
W26 RF cable, A34 port 3 coupler to front-panel Port 3 CPLR ARM 1 N5245-20015
W28 RF cable, Front panel port 4 CPLR THRU to A35 port 4 coupler 1 N5245-20096
W29 RF cable, A31 port 4 receiver coupler to front-panel REF 4 SOURCE 1 N5245-20117
W30 RF cable, A35 port 4 coupler to front-panel Port 4 CPLR ARM 1 N5245-20018
W32 RF cable, Front panel port 2 CPLR THRU to A36 port 2 coupler 1 N5245-20097
W34 RF cable, A36 port 2 coupler to front-panel Port 2 CPLR ARM 1 N5245-20019
W36 RF cable, Front panel jumper 6 N5245-20155
W44 RF cable, REF 3 RCVR R3 IN to A28 mixer brick (R3) 1 N5245-20020
W45 RF cable, REF 4 RCVR R4 IN to A69 3 dB pad on A28 mixer brick (R4) 1 N5245-20021
W47 RF cable, REF 2 RCVR R2 IN to A27 mixer brick (R2) 1 N5245-20115
W52 RF cable, A25 HMA26.5 to A26 splitter 1 N5245-20013
W53 RF cable, A26 splitter to A27 mixer brick 1 N5245-20023
W54 RF cable, A26 splitter to A28 mixer brick 1 N5245-20022
W62 RF cable, A27 mixer brick (R1) to A24 IF multiplexer (P411) 1 N5242-60021
W63 RF cable, A27 mixer brick (R2) to A24 IF multiplexer (P412) 1 N5242-60022
W65 RF cable, A28 mixer brick (D) to A24 IF multiplexer (P801) 1 N5242-60024
W66 RF cable, A28 mixer brick (R4) to A24 IF multiplexer (P414) 1 N5242-60019
Table 1 Contents of Upgrade Kit N5225-60118
Ref
Desig. Description Qty Part Number

Installation Note N5225-90118 13
Items Included in the Upgrade Kit
W67 RF cable, A28 mixer brick (R3) to A24 IF multiplexer (P413) 1 N5242-60020
W68 RF cable, A28 mixer brick (C) to A24 IF multiplexer (P601) 1 N5242-60023
W70 RF cable, A24 IF multiplexer board P203 to A16 SPAM board J2 1 N5242-60013
W72 RF cable, A24 IF multiplexer board P603 to A16 SPAM board J5 1 N5242-60015
W77 RF cable, A14 frequency reference board J7 to A17 13.5 GHz (source 2) synthesizer
board J5 (Located on bottom of board.) 1 N5242-60030
W85 RF cable, A30 port 3 receiver coupler to A39 port 3 source attenuator 1 N5245-20026
W86 RF cable,
A39 port 3 source attenuator to front-panel Port 3 SOURCE OUT 1 N5245-20027
W89 RF cable, A31 port 4 receiver coupler to A40 port 4 source attenuator 1 N5245-20026
W90 RF cable,
A40 port 4 source attenuator to front-panel Port 4 SOURCE OUT 1 N5245-20028
W99 RF cable, Port 3 RCVR C IN to A47 port 3 receiver attenuator 1 N5245-20073
W100 RF cable, A47 port 3 receiver attenuator to A28 mixer brick (C) 1 N5245-20066
W101 RF cable, Port 4 RCVR D IN to A48 port 4 receiver attenuator 1 N5245-20074
W102 RF cable, A48 port 4 receiver attenuator to A28 mixer brick (D) 1 N5245-20075
- Ribbon cable, A23 test set motherboard J547 to A39 port 3 source attenuator 2 N5245-60006
- Ribbon cable, A23 test set motherboard J548 to A40 port 4 source attenuator
- Ribbon cable, A23 test set motherboard J206 to A47 port 3 receiver attenuator 2 N5245-60026
- Ribbon cable, A23 test set motherboard J207 to A48 port 4 receiver attenuator
- Ribbon cable, A23 test set motherboard J552 to A28 mixer brick (2) J52 1 N5247-60015
Extra quantities of items such as protective plastic caps, screws, cable ties,
and cable clamps may be included in this upgrade kit. It is normal for some
of these items to remain unused after the upgrade is completed.
Table 1 Contents of Upgrade Kit N5225-60118
Ref
Desig. Description Qty Part Number

14 Installation Note N5225-90118
Installation Procedure for the Upgrade
-
Installation Procedure for the Upgrade
The network analyzer must be in proper working condition prior to installing
this option. Any necessary repairs must be made before proceeding with this
installation.
Overview of the Installation Procedure
“Step 1. Obtain a Keyword and Verify the Information.”
“Step 2. Remove the Outer Cover.”
“Step 3. Remove the Inner Cover.”
“Step 4. Remove the Front Panel Assembly.”
“Step 5. Remove the A23 Test Set Motherboard.”
“Step 6. Remove Some Bottom-Side (Test Set) Cables.”
“Step 7. Remove the A27 Mixer Brick Assembly.”
“Step 8. Assemble the A28 Mixer Brick Assembly.”
“Step 9. Install the A27/A28 Mixer Brick Assemblies.”
“Step 10. Assemble the A34 and A35 Reference Coupler Assemblies.”
“Step 11. Install the A34 and A35 Reference Coupler Assemblies.”
“Step 12. Assemble the A47 and A48 Receiver Attenuator Assemblies.”
“Step 13. Install the A47 and A48 Receiver Attenuator Assemblies.”
“Step 14. Assemble the A39 and A40 Source Attenuator Assemblies.”
“Step 15. Install the A39 and A40 Source Attenuator Assemblies.”
“Step 16. Assemble the A33 - A36 Test Port Coupler Assemblies.”
“Step 17. Install the LED Boards, Bulkhead Connectors, and Test Port Coupler
Assemblies to the 4-Port Test Set Front Plate.”
“Step 18. Install the 4-Port Coupler Plate Assembly to the Deck.”
“Step 19. Assemble and Install the A12 and A13 40 GHz Doubler Assemblies.”
“Step 20. Install Bracket to A10 Source Assembly.”
This installation requires the removal of the analyzer’s protective
outer covers. The analyzer must be powered down and
disconnected from the mains supply before performing this
procedure.
Some of the following figures provided in this procedure contain bias tees.
Bias tees are included in the Option 219/419 upgrade kits and can be
ignored for Options 217/417 and 222/422.

Installation Note N5225-90118 15
Installation Procedure for the Upgrade
“Step 21. Assemble the A10 26.5 GHz Source 2 Assembly.”
“Step 22. Install the A10 26.5 GHz Source 2 Assembly and Cables.”
“Step 23. Install the A17 13.5 GHz (Source 2) Synthesizer Board and Cables.”
“Step 24. Install the Cable Bracket Mount.”
“Step 25. Install Some Bottom-Side (Test Set) Cables.”
“Step 26. Secure the Front Panel Bulkhead Connectors.”
“Step 27. Install Cables on IF Multiplexer Board.”
“Step 28. Reinstall the A23 Test Set Motherboard.”
“Step 29. Install Cables on the A23 Test Set Motherboard.”
“Step 30. Replace the Front Panel’s Lower Dress Panel.”
“Step 31. Reinstall Front Panel Assembly.”
“Step 32. Install the Overlay.”
“Step 33. Install the Front Panel Jumper Cables.”
“Step 34. Position the Cables and Wires to Prevent Pinching.”
“Step 35. Reinstall the Inner Cover.”
“Step 36. Reinstall the Outer Cover.”
“Step 37. Remove Option 217 License.”
“Step 38. Enable Options 417.”
“Step 39. Verify the PNA Analyzer Program is Running with the Correct
Options.”
“Step 40. Perform Post-Upgrade Adjustments and Calibration.”
“Step 41. Prepare the PNA for the User.”

16 Installation Note N5225-90118
Installation Procedure for the Upgrade
-
Step 1.Obtain a Keyword and Verify the Information
Follow the instructions on the Software Entitlement Certificate supplied to
obtain a license key for installation of this upgrade. Refer to “License Key
Redemption” on page 7.
Verify that the model number, serial number, and option number information
on the license key match those of the instrument on which this upgrade will be
installed.
If the model number, serial number, or option number do not match those on
your license key, you will not be able to install the option. If this is the case,
contact Keysight for assistance before beginning the installation of this
upgrade. Refer to “Contacting Keysight” on page 6.
Once the license key file has been received and the information verified, you
can proceed with the installation at step 2.
Step 2. Remove the Outer Cover
For instructions, click the Chapter 7 bookmark “Removing the Covers” in the
PDF Service Guide.
Step 3. Remove the Inner Cover
For instructions, click the Chapter 7 bookmark “Removing the Covers” in the
PDF Service Guide.
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 Guide1.
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.
If the model number, serial number, or option number do not match those
on your license key file, you will not be able to install the option. If this is
the case, contact Keysight for assistance before beginning the installation
of this upgrade. Refer to “Contacting Keysight” on page 6.

Installation Note N5225-90118 17
Installation Procedure for the Upgrade
Step 6. Remove Some Bottom-Side (Test Set) Cables
1. Place the analyzer bottom-side up on a flat surface.
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 Guide1.
These cables may be discarded - they will not be reinstalled.
— W20 (N5245-20045) Front panel port 1 CPLR THRU to A33 port 1
coupler
— W21 (N5245-20118) A29 port 1 receiver coupler to A37 reference
mixer switch
— W22 (N5245-20025) A33 port 1 coupler to front-panel REF 1 CPLR
ARM
— W32 (N5245-20106) Front panel port 2 CPLR THRU to A36 port 2
coupler
— W34 (N5245-20024) A36 port 2 coupler to front-panel REF 2 CPLR
ARM
— W47 (N5245-20119) A27 mixer brick (R2) to
front-panel REF 2 RCVR R2
IN
— W62 (N5242-60025) A27 mixer brick (R1) to A24 IF multiplexer (P601)
— W63 (N5242-60026) A27 mixer brick (R2) to A24 IF multiplexer (P801)
— W70 (N5247-60024) A24 IF multiplexer board P203 to A16
SPAM board J5
— W72 (N5247-60023) A24 IF multiplexer board P603 to A16
SPAM board J2
— W80 (N5245-20048) A25 HMA26.5 to A27 mixer brick
These cables must be saved - they will be reinstalled.
— W12 (N5245-20050) A29 port 1 receiver coupler to W11
— W18 (N5245-20049) A32 port 2 receiver coupler to W17
— W36 (N5245-20155) Front panel jumpers (quantity = 6)
NOTE: Remove and save the cable guards for the front panel jumpers.
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 “Downloading the Online PNA Service Guide” on page 8.

18 Installation Note N5225-90118
Installation Procedure for the Upgrade
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Step 7. Remove the A27 Mixer Brick Assembly
Remove the A27 mixer brick assembly from the PNA. For instructions, click the
Chapter 7 bookmark, “Removing and Replacing the A27 and A28 Mixer Bricks”
in the PDF Service Guide1.
Step 8. Assemble the A28 Mixer Brick Assembly
1. Follow the instruction shown in Figure 1. New parts are listed in Table 1 on
page 10 of this document.
Figure 1 A28 Mixer Brick Assembly

Installation Note N5225-90118 19
Installation Procedure for the Upgrade
2. Follow the two instructions shown in Figure 2.
Figure 2 A28 Mixer Brick Shield Installation

20 Installation Note N5225-90118
Installation Procedure for the Upgrade
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3. Follow the two instructions shown in Figure 3.
Figure 3 A69 3 dB Pad and A26 Splitter Installation