Keysight N5247-60103 Installation and operation manual

Keysight Extended Power
Range and Bias Tees
Upgrade Kit
Installation Note
To Upgrade PNA-X N5247A Option 400 to Option 419
Upgrade Kit Order Number: N5247AU-926
Keysight Kit Number: N5247-60103

2 Installation Note N5247-90103
WARRANTY STATEMENT
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 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION
WITH THE FURNISHING, USE, OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED
HEREIN. SHOULD KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY
TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS, THE
WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL.
DFARS/Restricted Rights Notice
If software is for use in the performance of a U.S. Government prime contract or subcontract, Software is
delivered and licensed as “Commercial computer software” as defined in DFAR 252.227-7014 (June 1995), or as
a “commercial item” as defined in FAR 2.101(a) or as “Restricted computer software” as defined in FAR 52.227-
19 (June 1987) or any equivalent agency regulation or contract clause. Use, duplication or disclosure of
Software is subject to Keysight Technologies’ standard commercial license terms, and non-DOD Departments
and Agencies of the U.S. Government will receive no greater than Restricted Rights as defined in FAR 52.227-
19(c)(1-2) (June 1987). U.S. Government users will receive no greater than Limited Rights as defined in FAR
52.227-14 (June 1987) or DFAR 252.227-7015 (b)(2) (November 1995), as applicable in any technical data.
Safety Notes
The following safety notes are used throughout this document. Familiarize yourself with each of these notes
and its meaning before performing any of the procedures in this document.
WARNING Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed
or adhered to, could result in injury or loss of life. Do not proceed beyond a warning note until
the indicated conditions are fully understood and met.
CAUTION Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or
adhered to, could result in damage to or destruction of the instrument. Do not proceed beyond a
caution note until the indicated conditions are fully understood and met.
Description of the Upgrade
This upgrade converts your standard 4-port configurable test set analyzer (N5247A Option 400) to an extended
power range analyzer with bias tees by adding:

Installation Note N5247-90103 3
• a 50-dB source attenuator and a bias tee in each source port channel
• a 50-dB receiver attenuator in each receiver channel
After installation of this upgrade, your analyzer will be an N5247A Option 419.
Getting Assistance from Keysight
By internet or phone, get assistance with all your test and measurement needs.
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.
NOTE 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.
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,
email Keysight Component Test Division (CTD) Support at [email protected], or telephone the
CTDHotlineat(707)577-6802andleaveavoicemailmessage.Pleaseincludedetailsoftheproblem.

4 Installation Note N5247-90103
Getting Prepared
CAUTION 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.
To successfully install this upgrade kit, you will need the following:
• A license key - refer to “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 6.
• Enough time - refer to “About Installing the Upgrade” on page 6.
• 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
NOTE The enclosed Option 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 for the instrument that will receive the option.
To enable the option product, you must request a license key from: http://www.keysight.com/find/
softwarelicense. To complete the request, you will need to gather the following information:
• From the certificate
❏Order number
❏Certificate number
• From your instrument
❏Model number
❏Serial number
❏Host ID
The instrument information is available on the network analyzer – on the analyzer’s Help menu, click About
Network Analyzer.
If you provide an email address, Keysight will promptly email your license key. Otherwise, you will your receive
your license key via postal mail.
1. See “Downloading the Online PNA Service Guide” on page 5.

Installation Note N5247-90103 5
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: N5242A) 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.
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

6 Installation Note N5247-90103
Tools Required for the Installation
CAUTION 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.
About Installing the Upgrade
Description Qty Part Number
T-10 TORX driver - set to 9 in-lbs (1.02 N.m) 1N/A
T-20 TORX driver - set to 21 in-lbs (2.38 N.m) 1N/A
5/16-in (8 mm) nutsetter or open end torque wrench - set to 10 in-lbs (1.13 N.m) 1N/A
5/16-in (8 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) 1N/A
1/4-in (6 mm) open end wrench 1N/A
Products affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .N5247A Option 400
Installation to be performed by . . . . . . . . . . . . . . . . . . . . . . . .Keysight service center or personnel qualified by
Keysight
Estimated installation time . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 hours
Estimated adjustment time. . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 hour
Estimated full instrument calibration time . . . . . . . . . . . . . . .4.5 hours

Installation Note N5247-90103 7
Items Included in the Upgrade Kit1
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 3.
1. In addition to the upgrade kit, the shipment includes an Option Entitlement Certificate. Refer to “License Key Redemption”
on page 4 for important information about this certificate.
Table 1 Contents of Upgrade Kit N5247-60103
Ref
Desig. Description Qty Part Number
-- Installation note (this document) 1N5247-90103
A38–
A41 0–50 dB source step attenuator 484905-60002
A42–
A45 Bias tee 45087-7732
A46–
A49 0-50 dB receiver step attenuator 484905-60002
-- Attenuator bracket 4N5247-00005
-- Bias tee bracket 2N5247-20129
--
Machine screw, M3 x 8, pan head (16 to attach attenuators to brackets; 16 to attach
attenuator assemblies to deck; 2 to attach port 2 coupler assembly to port 2
attenuators assembly; 3 to attach port 3 coupler assembly to port 3 attenuators
assembly; 3 to attach port 4 coupler assembly to port 4 attenuators assembly; 3 to
attach port 1 coupler assembly to port 1 attenuators assembly; 4 to attach bias tee
assemblies to deck; 8 to secure center braces)
60 0515-0372
-- Machine screw, M3 x 6, flat head (to secure bias tees to brackets) 10 0515-1227
-- Machine screw, M3 x 10, pan head (to secure side braces) 50515-0374
-- Machine screw, M4 x 10, pan head (to secure center braces) 30515-0380
-- Cable clamp (3 to secure W146 (N5247-20058); 1 to secure W145 (N5247-20066); 1
to secure W41 (N5247-20069); 1 to secure W37 (N5247-20070). 11 1400-1334
-- Cable tie wrap, 2 to secure W120 (N5247-20064); 1 to secure W144 (N5247-20071). 81400-0249
-Brace (center), bottom side of PNA 2N5247-20134
-Brace (center), bottom side of PNA 1N5247-20133
-Brace (side), bottom side of PNA 2N5247-20132
W27 RF cable, A60 port 1 70 GHz doubler to A29 port 1 reference coupler 1N5247-20044
W28 RF cable, A61 port 3 70 GHz doubler to A30 port 3 reference coupler 1N5247-20043
W29 RF cable, A62 port 4 70 GHz doubler to A31 port 4 reference coupler 1N5247-20044
W30 RF cable, A63 port 2 70 GHz doubler to A32 port 2 reference coupler 1N5247-20043
W37 RF cable, A30 port 3 reference coupler to front-panel REF 3 SOURCE OUT 1N5247-20070
W41 RF cable, A31 port 4 reference coupler to front-panel REF 4 SOURCE OUT 1N5247-20069

8 Installation Note N5247-90103
W101 RF cable, A29 port 1 reference coupler to A38 port 1 source attenuator 1N5247-20083
W102 RF cable, A38 port 1 source attenuator to front-panel port 1 SOURCE OU T 1 N5247-20014
W103 RF cable, Front-panel port 1 CPLR THRU to A42 port 1 bias tee 1N5247-20081
W104 RF cable, A33 port 1 coupler to A42 port 1 bias tee 1N5247-20022
W105 RF cable, A30 port 3 reference coupler to A39 port 3 source attenuator 1N5247-20083
W106 RF cable, A39 port 3 source attenuator to front-panel port 3 SOURCE OU T 1 N5247-20009
W107 RF cable, Port 3 CPLR THRU to A43 port 3 bias tee 1N5247-20010
W108 RF cable, A43 port 3 bias tee to A34 port 3 coupler 1N5247-20028
W109 RF cable, A31 port 4 reference coupler to A40 port 4 source attenuator 1N5247-20083
W110 RF cable, A40 port 4 source attenuator to front-panel port 4 SOURCE OUT 1N5247-20025
W111 RF cable, Port 4 CPLR THRU to A44 port 4 bias te e 1N5247-20021
W112 RF cable, A44 port 4 bias tee to A35 port 4 coupler 1N5247-20029
W113 RF cable, A32 port 2 reference coupler to A41 port 2 source attenuator 1N5247-20083
W114 RF cable, A41 port 2 source attenuator to front-panel port 2 SOURCE OUT 1N5247-20034
W115 RF cable, Port 2 CPLR THRU to A45 port 2 bias tee 1N5247-20027
W116 RF cable, A45 port 2 bias tee to A36 port 2 coupler 1N5247-20080
W117 RF cable, Front-panel port 1 RCVR A IN to A46 port 1 receiver attenuator 1N5247-20013
W118 RF cable, A46 port 1 receiver attenuator to A27 mixer brick (A) 1N5247-20047
W119 RF cable, Port 3 RCVR C IN to A47 port 3 receiver attenuator 1N5247-20008
W120 RF cable, A47 port 3 receiver attenuator to A28 mixer brick (C) 1N5247-20064
W121 RF cable, Port 4 RCVR D IN to A48 port 4 receiver attenuator 1N5247-20024
W122 RF cable, A48 port 4 receiver attenuator to A28 mixer brick (D) 1N5247-20065
W123 RF cable, Port 2 RCVR B IN to A49 port 2 receiver attenuator 1N5247-20020
W124 RF cable, A49 port 2 receiver attenuator to A27 mixer brick (B) 1N5247-20046
W144 RF cable, A29 port 1 reference coupler to A37 reference mixer switch 1N5247-20071
W145 RF cable, REF 2 RCVR R2 IN to A27 mixer brick (R2) 1N5247-20066
W146 RF cable, A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT 1N5247-20058
-- Ribbon cable, A23 test set motherboard J205 to A46 port 1 receiver attenuator
4N5247-60020
-- Ribbon cable, A23 test set motherboard J206 to A47 port 3 receiver attenuator
-- Ribbon cable, A23 test set motherboard J207 to A48 port 4 receiver attenuator
-- Ribbon cable, A23 test set motherboard J208 to A49 port 2 receiver attenuator
Table 1 Contents of Upgrade Kit N5247-60103
Ref
Desig. Description Qty Part Number

Installation Note N5247-90103 9
NOTE Extra quantities of items such as protective plastic caps, screws, cable ties, and cable
clamps are included in this upgrade kit. It is normal for some of these items to remain
unused after the upgrade is completed.
-- Ribbon cable, A23 test set motherboard J549 to A38 test port 1 source attenuator
4N5245-60006
-- Ribbon cable, A23 test set motherboard J547 to A39 test port 3 source attenuator
-- Ribbon cable, A23 test set motherboard J548 to A40 test port 4 source attenuator
-- Ribbon cable, A23 test set motherboard J546 to A41 test port 2 source attenuator
-- Ribbon cable, A23 test set motherboard J541 to A42 port 1 bias tee
4N5247-60021
-- Ribbon cable, A23 test set motherboard J543 to A43 port 3 bias tee
-- Ribbon cable, A23 test set motherboard J544 to A44 port 4 bias tee
-- Ribbon cable, A23 test set motherboard J542 to A45 port 2 bias tee
Table 1 Contents of Upgrade Kit N5247-60103
Ref
Desig. Description Qty Part Number

10 Installation Note N5247-90103
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.
WARNING 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.
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 Some Bottom-Side (Test Set) Cables.
Step 6. Remove Port 1 and Port 2 Coupler Assemblies from the Test Set Deck.
Step 7. Swap Brackets on the Port 1 and Port 2 Coupler Assemblies.
Step 8. Assemble the Port 2 and Port 3 Step Attenuators.
Step 9. Install the Step Attenuators.
Step 10. Reinstall the Port 2 and Port 3 Coupler Assemblies.
Step 11. Remove Port 3 and Port 4 Coupler Assemblies from the Test Set Deck.
Step 12. Swap Brackets on the Port 3 and Port 4 Coupler Assemblies.
Step 13. Assemble the Port 1 and Port 4 Step Attenuators.
Step 14. Install the Step Attenuators.
Step 15. Reinstall the Port 3 and Port 4 Coupler Assemblies.
Step 16. Assemble the Bias Tees.
Step 17. Install the Bias Tee Assemblies.
Step 18. Install Some Bottom-Side (Test Set) Cables.
Step 19. Install the Braces.
Step 20. Reinstall Front Panel Assembly.
Step 21. Position the Cables and Wires to Prevent Pinching.
Step 22. Reinstall the Inner Cover.
Step 23. Reinstall the Outer Cover.
Step 24. Enable Option 419.
Step 25. Perform Post-Upgrade Adjustments and Calibration.

Installation Note N5247-90103 11
Step 26. Prepare the PNA for the User.
Step 1. Obtain a Keyword and Verify the Information
Follow the instructions on the Option Entitlement Certificate supplied to obtain a license key for installation of
this upgrade. Refer to “License Key Redemption” on page 4.
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 3.
Once the license key 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 Guide1.
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 Guide1.
1. See “Downloading the Online PNA Service Guide” on page 5.

12 Installation Note N5247-90103
Step 5. Remove Some Bottom-Side (Test Set) Cables
NOTE 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.
NOTE 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.
NOTE 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. Place the analyzer bottom-side up on a flat surface.
2. Remove the cables in the following two lists in the order shown. To see an image showing the location of
these cables, click the Chapter 6 bookmark “Bottom RF Cables, Standard 4-Port Configuration, Option 400”
in the PDF Service Guide1.
These cables may be discarded - they will not be reinstalled.
• W27 (N5247-20074) A60 port 1 70 GHz doubler to A29 port 1 reference coupler
• W28 (N5247-20052) A61 port 3 70 GHz doubler to A30 port 3 reference coupler
• W29 (N5247-20074) A62 port 4 70 GHz doubler to A31 port 4 reference coupler
• W30 (N5247-20052) A63 port 2 70 GHz doubler to A32 port 2 reference coupler
• W31 (N5247-20037) A29 port 1 ref coupler to front-panel port 1 SOURCE OUT
• W32 (N5247-20016) Port 1 CPLR THRU to A33 port 1 coupler
• W33 (N5247-20078) A29 port 1 reference coupler to A37 reference mixer switch
• W35 (N5247-20023) A30 port 3 ref coupler to front-panel port 3 SOURCE OUT
• W36 (N5247-20006) Port 3 CPLR THRU to A34 port 3 coupler
• W37 (N5247-20077) A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT
• W39 (N5247-20035) A31 port 4 ref coupler to front-panel port 4 SOURCE OUT
• W40 (N5247-20017) Port 4 CPLR THRU to A35 port 4 coupler
• W41 (N5247-20075) A31 port 4 ref coupler to front-panel REF 4 SOURCE OUT
• W43 (N5247-20036) A32 port 2 ref coupler to front-panel port 2 SOURCE OUT
• W44 (N5247-20018) Port 2 CPLR THRU to A36 port 2 coupler
• W45 (N5247-20076) A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT
• W47 (N5247-20053) Port 1 RCVR A IN to A27 mixer brick (A)
• W48 (N5247-20063) Port 3 RCVR C IN to A28 mixer brick (C)
• W49 (N5247-20073) Port 4 RCVR D IN to A28 mixer brick (D)
1. See “Downloading the Online PNA Service Guide” on page 5.

Installation Note N5247-90103 13
• W50 (N5247-20054) Port 2 RCVR B IN to A27 mixer brick (B)
• W56 (N5247-20055) REF 2 RCVR R2 IN to A27 mixer brick (R2)
These cables must be saved - they will be reinstalled.
• W16 (N5247-20060) A61 port 3 70 GHZ doubler to W15
• W18 (N5247-20084) A61 port 3 70 GHZ doubler to W17
• W20 (N5247-20015) A62 port 4 70 GHZ doubler to W19
• W22 (N5247-20068) A62 port 4 70 GHZ doubler to W21
• W34 (N5247-20082) A33 port 1 coupler to front-panel port 1 CPLR ARM
• W38 (N5247-20007) A34 port 3 coupler to front-panel port 3 CPLR ARM
• W42 (N5247-20026) A35 port 4 coupler to front-panel port 4 CPLR ARM
• W46 (N5247-20019) A36 port 2 coupler to front-panel port 2 CPLR ARM
• W54 (N5247-20062) REF 3 RCVR R3 IN to A28 mixer brick (R3)
• W55 (N5247-20067) REF 4 RCVR R4 IN to 3 dB pad on A28 mixer brick (R4)
• W62 (N5247-20111) Port 4 CPLR THRU to A44 port 4 bias tee
• W66 (N5247-20109) W65 to rear-panel EXT TSET DRIVE RF OUT (J6)
• W68 (N5247-20088) rear-panel port RF2 OUT (J12) to W67
• W69 (N5247-20112) A27 mixer brick to EXT TSET DRIVE LO OUT (J5)
3. 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.

14 Installation Note N5247-90103
Step 6. Remove Port 1 and Port 2 Coupler Assemblies from the Test Set Deck
For instructions on removing the coupler assemblies, click the Chapter 7 bookmark “Removing and Replacing
the A29-A32 Reference Couplers and Reference Coupler Mounting Brackets” in the PDF Service Guide1. Save
the parts for reinstallation later.
Step 7. Swap Brackets on the Port 1 and Port 2 Coupler Assemblies
Remove the brackets from the coupler assemblies being careful to remember which bracket was removed from
each coupler. Reinstall the bracket that had been installed on the Port 1 Coupler Assembly onto the Port 2
Coupler Assembly. Next, reinstall the bracket that had been installed on the Port 2 Coupler Assembly onto the
Port 1 Coupler Assembly.
Step 8. Assemble the Port 2 and Port 3 Step Attenuators
Refer to Figure 1 for this step of the procedure. New parts are listed in Table 1 on page 7. Use a T-10 TORX driver
to tighten all screws.
Figure 1 Port 2 and Port 3 Step Attenuators Assembly
1. See “Downloading the Online PNA Service Guide” on page 5.

Installation Note N5247-90103 15
Step 9. Install the Step Attenuators
Refer to Figure 2 for this step of the procedure. New parts are listed in Table 1 on page 7. Use a T-10 TORX driver
to tighten all screws.
Figure 2 Port 2 and Port 3 Step Attenuators Installation

16 Installation Note N5247-90103
Step 10. Reinstall the Port 2 and Port 3 Coupler Assemblies
Refer to Figure 3 for this step of the procedure. Use a T-10 TORX driver to tighten all screws.
Figure 3 Port 2 and Port 3 Coupler Assemblies Reinstallation
Step 11. Remove Port 3 and Port 4 Coupler Assemblies from the Test Set Deck
For instructions on removing the coupler assemblies, click the Chapter 7 bookmark “Removing and Replacing
the A29-A32 Reference Couplers and Reference Coupler Mounting Brackets” in the PDF Service Guide1. Save
the parts for reinstallation later.
Step 12. Swap Brackets on the Port 3 and Port 4 Coupler Assemblies
Remove the brackets from the coupler assemblies being careful to remember which bracket was removed from
each coupler. Reinstall the bracket that had been installed on the Port 1 Coupler Assembly onto the Port 2
Coupler Assembly. Next, reinstall the bracket that had been installed on the Port 2 Coupler Assembly onto the
Port 1 Coupler Assembly.
1. See “Downloading the Online PNA Service Guide” on page 5.

Installation Note N5247-90103 17
Step 13. Assemble the Port 1 and Port 4 Step Attenuators
Refer to Figure 4 for this step of the procedure. New parts are listed in Table 1 on page 7. Use a T-10 TORX driver
to tighten all screws.
Figure 4 Port 1 and Port 4 Step Attenuators Assembly

18 Installation Note N5247-90103
Step 14. Install the Step Attenuators
Refer to Figure 5 for this step of the procedure. New parts are listed in Table 1 on page 7. Use a T-10 TORX driver
to tighten all screws.
Figure 5 Port 1 and Port 4 Step Attenuators Installation

Installation Note N5247-90103 19
Step 15. Reinstall the Port 3 and Port 4 Coupler Assemblies
Refer to Figure 6 for this step of the procedure. Use a T-10 TORX driver to tighten all screws.
Figure 6 Port 3 and Port 4 Coupler Assemblies Reinstallation