Keysight N5225-60143 Quick start guide

Installation Note
To Upgrade 4-Port B models to 4-Port B models with Option 4S7
N5224BU-4S7 (for N5224B), N5225BU-4S7 (for N5225B), N5227BU-4S7
(for N5275B), N5244BU-4S7 (For N5244B), N5245BU-4S7 (For N5245B),
and N5247BU-4S7 (For N5247B)
Upgrade Kit Number: N5225-60143
Keysight 4-Port
N5224/5/7B and N5244/5/7B Models
PNA Direct Digital Synthesizer (DDS)
Upgrade Kit
This manual provides documentation for the following models:

Notices
© Keysight Technologies, Inc.
2007-2020
No part of this manual may be
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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
N5225-90143
Edition
Edition 1, July 2020
Supersedes: n/a
Printed in USA/Malaysia
Published by:
Keysight Technologies
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Warranty
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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
Keysight Add Direct Digital Synthesizer (DDS) 4-Port Upgrade Kit
Upgrade Kit Numbers: N5225-60143
Installation Note
Description of this Upgrade
This upgrade adds direct digital synthesis capability to your microwave
network analyzer. This is done by removing the existing frequency reference,
13.5 GHz synthesizer boards (x3), and installing a new direct digital synthesizer
assembly.
Refer to “Overview of the Installation Procedure” on page 10.
This upgrade adds the following items to your N5224/5/7B or N5244/5/7B
network analyzer:
— direct digital synthesizer (DDS) assembly
— new left outer and inner panels
— new cables
This repair must be done at a service center or a self-maintainer service
center! Refer to “Getting Assistance from Keysight” on page 4.

4 Installation Note N5225-90143
Description of this Upgrade
Getting Assistance from Keysight
-
Getting Assistance from Keysight
By internet or phone, get assistance with all your test and measurement needs.
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 N5225-90143 5
Description of this Upgrade
Getting Prepared
Getting Prepared
To successfully install this upgrade kit, you will need the following:
— A PDF copy or a paper copy of the PNA Service Guide - refer to
“Downloading the Online PNA Service Guide” on page 5 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 7.
— Enough time - refer to “About Installing the Upgrade” on page 7.
— 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.
Downloading the Online PNA Service Guide
To view the 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: N5247B)
and click Search.
3. Click Services & Support > Document Library > Manuals or under Refine
Your Results:
4. Click Manuals > 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.
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 5.

6 Installation Note N5225-90143
Description of this Upgrade
Getting Prepared
-
Protecting Your Workspace from Electrostatic Discharge
For information, click on the Chapter 1 bookmark, "Electrostatic Discharge
Protection" in the PDF of your instrument’s Service Guide on
www.keysight.com1.
ESD Equipment Required for the Installation
1. See “Downloading the Online PNA Service Guide” on page 5.
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

Installation Note N5225-90143 7
Description of this Upgrade
Tools Required for the Installation
Tools Required for the Installation
About Installing the Upgrade
Description Qty
T-10 TORX driver - set to 9 in-lbs (1.02 N.m) 1
T-20 TORX driver - set to 21 in-lbs (2.38 N.m) 1
5/16-in (8 mm) nutsetter or open end torque wrench - set to 10 in-lbs (1.13 N.m) 1
5/16-in (8 mm) nutsetter or open end torque wrench - set to 21 in-lbs (2.38 N.m) 1
T-6 TORX driver - set to 6 in-lbs (0.68 N.m) 1
5/8-in (16 mm) nutsetter or open end torque wrench - set to 21 in-lbs (2.38 N.m) 1
Needle nose pliers 1
Flat head screwdriver 1
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
9 mm nutsetter or open end torque wrench set to 21 in-lb.
Products affected All N5224/5/7B, N5244/5/7B 4-port microwave network
analyzers
Installation to be performed by Keysight service center, personnel qualified by Keysight, or
customer
Estimated installation time 3 hours
Estimated adjustment time 3 hours
Estimated full instrument calibration time 4.5 hours

8 Installation Note N5225-90143
Description of this Upgrade
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 “Description of this
Upgrade” on page 3.
This section applies to multiple models and upgrade kits. Please refer to
the model and upgrade kit for your instrument’s upgrade.
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 N5242-60143 Option 4S7
Qty Description Part Number
1Installation Note (this document) N5225-90143
1China RoHS Addendum 9320-6722
1A15 – Direct digital synthesizer (DDS) assembly (Assembly contains four
synthesizers) N5240-60102
1 A55 – Solid State Drive Assembly for 2.2 GHz CPU and Win10 in N52xxB N5242-60135
4 Screw-Machine W/Crest-Cup-Con-Washer Pan-HD Torx-T10 M3X0.510mm-LG
SST-300 Passivated – (x2 bracket-center, stabilizer (all options), x2 short and rear
panel bracket)
0515-0374
4 Screw-Machine W/Crest-Cup-Con-Washer Pan-HD Torx-T10 M3X0.5 8mm-LG
SST-300 Passivated – (x2 secure DDS to chassis)
0515-0380
1Cable assy-RF, A15 13.5 GHz (SRC 1) direct digital synthesizer (J4)-SRC 1 RF IN –
W1
N5240-20124
1Cable assy -RF, A15 13.5 GHz (LO) direct digital synthesizer (J5)-HMA RF IN –
W51/W61
N5240-20125
1Cable assy -RF, A15 13.5 GHz (SRC 2) direct digital synthesizer (J6)-SRC 2 RF IN –
W2
N5240-20126
1Cable assy –RF, A15 DD synthesizer (J7) to rear panel (J13) – (Option 422/423 only)
– W201
N5240-20127
1 Bracket, rear plate (Option 422/423 only) N5240-00015
1 Bracket-center, stabilizer, long N5240-20136
1 CA Assy, RF CA, SYNTH J11-SPAM J3 – W200 N5240-60115
1 Label, SRC3 J13 – Rear panel – (Option 422/423 Only) N5240-80042

Installation Note N5225-90143 9
Description of this Upgrade
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.
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.

10 Installation Note N5225-90143
Description of this Upgrade
Overview of the Installation Procedure
-
Overview of the Installation Procedure
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.
All instruments:
“Step 1. Remove the Inner and Outer covers” on page11
“Step 2. Remove Some Bottom Cables” on page 11
“Step 3. Remove Some Top Cables” on page 12
“Step 4. Remove the Left and Right Inner Bracket’s #4 Card Guides” on
page 13
“Step 5. Install the Center Bracket” on page 14
“Step 6. Reinstall Bottom Cables” on page 15
“Step 7. Reinstall Top Assemblies Reinstall the A5 through A16 (Except A15
Direct Digital Synthesis (DDS) Assembly) and Cables” on page 16
“Step 8. Install *NEW* A15 Direct Digital Synthesizer (DDS) Assembly” on
page 17
“Step 9. Install *NEW* and Reused Direct Digital Synthesis (DDS) Assembly
Cables” on page 19
“Step 10. Route Gray Cables” on page 22
“Step 11. Add Back Plate and Cable to Rear Panel (Option 422/423 With and
Without 029 Only)” on page24
“Step 12. Install "SRC3 J13" Label on Rear Panel (Option 422/423 With and
Without Option 029 Only)” on page 26
“Step 13. Remove and Replace the A55 Solid State Drive (SSD)” on page 26
“Step 14. Boot the Instrument” on page 27
“Step 15. Reinstall the Inner and Outer Covers” on page 27
“Step 16. Verify the PNA Analyzer Program is Running with the Correct
Options” on page 27
“Step 17. Perform Post-Upgrade Adjustments and Calibration” on page 28
“Step 18. Prepare the PNA for the User” on page 29
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.

Installation Note N5225-90143 11
Description of this Upgrade
Step 1. Remove the Inner and Outer covers
Step 1. Remove the Inner and Outer covers
For instructions, click the Chapter 7 bookmark “Removing the Covers” in the
PDF Service Guide1.
Step 2. Remove Some Bottom Cables
Carefully, turn the instrument so it is bottom side up on a flat surface.
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
4-Port Configuration [for your option]” in the PDF Service Guide1.
3. These cables may be discarded - they will not be reinstalled.
Remove one end of W51 (N5224/5B and N5244/5B)/W61 N5227B and
N5247B. The other end is disconnected in the “Step 3. Remove Some Top
Cables” on page 12.
— N5224/5B and N5244/5B: W51 (N5245-20101) A15 13.5 GHz (LO)
synthesizer board J1207 to A25 HMA26.5
— N5227B and N5247B: W61 (N5247-20110) A15 13.5 GHz (LO)
synthesizer board J1207 to A25 HMA26.5
1. See “Downloading the Online PNA Service Guide” on page 5.
Be careful not to damage the center pins of the semi-rigid cables. Some
flexing of the cables may be necessary but do not over-bend them.
Leave the gray flexible cables, the wire harnesses, and the ribbon cables
connected where possible. Any that are removed should be labeled for
reconnection later.
N5224/5B and N5244/5B: This same W51 reference designator is assigned
to the S7 upgrade cable N5240-20125.
N5227B and N5247B: This same W61 reference designator is assigned to
the S7 upgrade cable N5240-20125.

12 Installation Note N5225-90143
Description of this Upgrade
Step 3. Remove Some Top Cables
-
Step 3. Remove Some Top Cables
Carefully turn the PNA so it is top-side up for this step.
Refer to your Service Guide’s "Removing and Replacing the A4–17 Boards"
section. Set aside all hardware for reuse.
Exceptions (See also, note below):
The following cables are not reused:
— W1 (N5222-20066) A4 13.5 GHz synthesizer board (source) (1) J1207 to A5
26.5 GHz source (1) board P1
— W2 (N5222-20090) A17 13.5 GHz source (2) synthesizer J1207 to A10
source (2) P1. (On 2-port models, W2 is included only with Opt. 224.)
— W74 (N5242-60027) (N5224/5B and N5244/5B Only) A14 frequency
reference board J4 to A16 SPAM board J3
— W84 (N5242-60027) (N5227B and N5247B Only) A14 frequency reference
board J4 to A16 SPAM board J3
— W75 (N5242-60028) (N5224/5B and N5244/5B Only) A14 frequency
reference board J5 to bottom of A15 13.5 GHz (LO) synthesizer board J5
— W85 (N5242-60028) (N5227B and N5247B Only) A14 frequency reference
board J5 to bottom of A15 13.5 GHz (LO) synthesizer board J5
— W76 (N5242-60029) (N5224/5B and N5244/5B only) A14 frequency
reference board J6 to bottom of A5 13.5 GHz (source 1) synthesizer board
J5
— W86 (N5242-60029) (N5227B and N5247B only) A14 frequency reference
board J6 to bottom of A5 13.5 GHz (source 1) synthesizer board J5
— W77 (N5242-60030) (N5224/5B and N5244/5B only) A14 frequency
reference board J7 to A13 13.5 GHz (source 2) synthesizer board J5. (On
2-port models, W77 is included only with Option 224.)
— W87 (N5242-60030) (N5227B and N5247B only) A14 frequency reference
board J7 to A13 13.5 GHz (source 2) synthesizer board J5. (On 2-port
models, W87 is included only with Option 224.)
IMPORTANT! A4 13.5 GHz source 1 synthesizer, A14 frequency reference,
A15 13.5 GHz (LO) synthesizer, and A17 13.5 GHz source 2 synthesizer
boards will not be reused. Set these aside as spares for your other PNAs or
recycle.

Installation Note N5225-90143 13
Description of this Upgrade
Step 4. Remove the Left and Right Inner Bracket’s #4 Card Guides
Step 4. Remove the Left and Right Inner Bracket’s #4 Card Guides
See also your Service Guide’s "Removing and Replacing the Fans" section. Set
aside all hardware for reuse.
Remove the #4 card guide from the left Panel. Refer to Figure 1 on page 13.
1. Remove x1 card guide (items ➁and ④) left panel/bracket (item ①) using
needle nose pliers and if necessary a flat head screw-driver. Save the card
guides for reuse.
2. Repeat the process and remove the corresponding card guide number ④
from the right inner panel (not shown, but see item ➂).
3. Left side bracket can be recycled (discarded).
Optional: Remove and retain card guide number ④as a spare. Else
recycle/discard.
Figure 1 Left Inner Bracket Card Guide Removal (N5242-40002)

14 Installation Note N5225-90143
Description of this Upgrade
Step 5. Install the Center Bracket
-
Step 5. Install the Center Bracket
Refer to Figure 2 for this step.
1. Remove (x2) 0515-0372 screws from motherboard/chassis (item ①).
Discard as these will not be reused.
2. Install center support bracket N5240-20136 (item ➁).
3. Secure the center support bracket with (x2) 0515-0374 screws (item ➂).
Figure 2 Install Center Bracket (N5242-20136, 0515-0374 (x2))

Installation Note N5225-90143 15
Description of this Upgrade
Step 6. Reinstall Bottom Cables
Step 6. Reinstall Bottom Cables
Carefully turn your instrument over so the bottom side is up.
Install the New Test Set Semi-rigid Cables
To see an image showing the location of these cables, refer to Figure 3 on
page 16. See also the Chapter 6 bookmarks “Bottom RF Cables, 4-Port
Configuration [for your option]” in the PDF Service Guide. New parts are listed
in Table on page 8.
Install the following new cable:
Refer to Figure 3 on page 16.
—①—W51(N5224/5B & N5244/5B)/W61 (N5227B & N5247B)
(N5240-20125) A15 13.5 GHz (LO) DD synthesizer assembly J5 to A21
HMA26.5 RF IN (The other end will be connected in “Step 8. Install *NEW*
A15 Direct Digital Synthesizer (DDS) Assembly” on page 17.)
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 semi-rigid 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.
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
9 mm nutsetter or open end torque wrench set to 21 in-lb.

16 Installation Note N5225-90143
Description of this Upgrade
Step 7. Reinstall Top Assemblies Reinstall the A5 through A16 (Except A15 Direct
Digital Synthesis (DDS) Assembly) and Cables
-
Figure 3 Install Bottom End of Top Cable (N5240-20125)
Step 7. Reinstall Top Assemblies Reinstall the A5 through A16
(Except A15 Direct Digital Synthesis (DDS) Assembly) and Cables
Carefully turn the PNA so it is top-side up for this step.
Refer to your Service Guide’s "Removing and Replacing the A4–A16 Boards"
section. Reuse hardware set aside in removal procedure.

Installation Note N5225-90143 17
Description of this Upgrade
Step 8. Install *NEW* A15 Direct Digital Synthesizer (DDS) Assembly
Step 8. Install *NEW* A15 Direct Digital Synthesizer (DDS) Assembly
Refer to Figure 4, Figure 5 on page 18, and Figure 6 on page 19 for this
procedure.
1. Install DDS assembly N5240-60102 into instrument. Ensure assembly is
fully seated.
2. Secure using 0515-0380 (x2) screws. Torque to 21 in-lbs.
Figure 4 Install A15 DDS (N5240-60102) –
(Noise Receiver Board Shown (Option 029 Only))

18 Installation Note N5225-90143
Description of this Upgrade
Step 8. Install *NEW* A15 Direct Digital Synthesizer (DDS) Assembly
-
Figure 5 A5 through A16 Boards Installed. Including A15 DDS Assembly
(N5240-60102) – 4-Port is Shown (i.e., A10, A12, A13 Boards and Related
Cables Are Installed in 4-Ports Only; A9 Noise Receiver Board Requires Option
029)

Installation Note N5225-90143 19
Description of this Upgrade
Step 9. Install *NEW* and Reused Direct Digital Synthesis (DDS) Assembly Cables
Step 9. Install *NEW* and Reused Direct Digital Synthesis (DDS)
Assembly Cables
1. Connect the following new cables in the order listed. Torque screws to
9 in-lbs.
Refer to Figure 6 on page 19.
—①—W51(N5224/5B & N5244/5B)/W61 (N5227B & N5247B)
(N5240-20125) A15 13.5 GHz (LO) synthesizer assembly J5 to A21
HMA26.5 RF IN (One end was connected in “Step 6. Reinstall
Bottom Cables” on page 15)
—➁—W1 (N5240-20124) A15 13.5 GHz (SRC 1) DD synthesizer
assembly J4 to A5 26.5 GHz source (1) board Source 1 RF IN
—➂—W2 (N5240-20126) A15 13.5 GHz (SRC 2) direct digital
synthesizer (J6)-SRC 2 RF IN
Torque all cables to 10-lbs.
Figure 6 Install New DDS Assembly Top Cables (N5240-20124, N5240-20125, and
N5240-20126)
Torque all cables
to 10 in-lbs.

20 Installation Note N5225-90143
Description of this Upgrade
Step 9. Install *NEW* and Reused Direct Digital Synthesis (DDS) Assembly Cables
-
2. Connect the following new and reused cables in the order listed.
Refer to Figure 6 on page 19.
—①—W69 (8120-5063) (reuse) Rear-panel REF IN to A15 DD
synthesizer assembly J9
—➁—W68 (8120-5063) (reuse) A15 DD synthesizer assembly J10 to
rear-panel REF OUT
—③—W200 (N5240-60115) SRC DD synthesizer assembly J16 to
SPAM J3
Figure 7 Install Following Flexible Cables to DDS Assembly – Top (8120-5063 (x2) and
N5240-60115)
3. Connect the other end of the following new and reused cables in the order
listed.
Refer to Figure 8 on page 21. Some models have different reference
designators for the same semirigid cable part number.
—①—W59 (N5242-60012) (reuse) A24 IF multiplexer board P3 to A16
SPAM board J1