Keysight N5241AU- 927 Installation and operation manual

Keysight Second Source,
Combiner, and Mechanical
Switches Upgrade Kit
Installation Note
To Upgrade PNA-X N5241A, N5242A, or N5249A
Option 419 to Option 423
Upgrade Kit Order Number: N5241AU- 927,
N5242AU- 927, and N5249AU- 927
Keysight Kit Number: N5242-60104

Installation Note N5242-90005 1

2 Installation Note N5242-90005
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 sign until the indicated conditions are fully understood and met.

Installation Note N5242-90005 3
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
CTD Hotline at [phone] and leave a voice mail message. Please include details of the problem.
Description of the Upgrade
This upgrade converts your Option 419 4-port analyzer (with configurable test set, extended power range, and
bias tees) to an Option 423 analyzer by adding a mechanical switch to each source port channel and a source
combiner to the port 1 channel.
In addition, source outputs are routed to the rear panel and rear-panel test set inputs are added.
About Installing the Upgrade
Products affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .N5241A, N5242A, and N5249A Option 419
Installation to be performed by . . . . . . . . . . . . . . . . . . . . . . . .Keysight service center or personnel qualified by
Keysight
Estimated installation time . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.0 hours
Estimated adjustment time. . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 hours
Estimated full instrument calibration time . . . . . . . . . . . . . . .4.5 hours

4 Installation Note N5242-90005
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 3.
Table 1 Contents of Upgrade Kit N5242-60104
Ref
Desig. Description Qty Part Number
Installation note (this document) N5242-90005
A46 Port 1 mechanical switch
4N1811-60028
Was N1811-60006
A47 Port 3 mechanical switch
A48 Port 4 mechanical switch
A49 Port 2 mechanical switch
A50 Combiner (bridge) 15087-7757
Was 5087-7315
Switch bracket 4N5242-00009
Machine screw, M2.5 x 20, pan head (to attach mechanical switch to switch bracket) 80515-1992
Machine screw, M3.0 x 20, pan head (to attach combiner to switch bracket) 20515-1410
Machine screw, M3.0 x 6, pan head (to attach switch bracket to analyzer) 80515-0430
Cable tie wrap 31400-0249
Bulkhead connector assembly for rear panel 11 1250-3805
W25 RF cable, REF 2 SOURCE OUT to A28 port 2 bridge 1N5222-20038
W95 RF cable, W3 to A46 port 1 mechanical switch 1N5242-20269
W96 RF cable, A46 port 1 mechanical switch to A25 test port 1 bridge 1N5242-20264
W97 RF cable, A46 port 1 mechanical switch to rear-panel PORT 1 SW SRC OUT (J11) 1N5242-20287
W98 RF cable, rear-panel PORT 1 COMB THRU IN (J10) to A50 combiner 1N5242-20288
W99 RF cable, rear-panel PORT 1 COMB ARM IN (J9) to A50 combiner 1N5242-20289
W100 RF cable, A50 combiner to A46 port 1 mechanical switch 1N5242-20265
W101 RF cable, W5 to A47 port 3 mechanical switch 1N5242-20266
W102 RF cable, A47 port 3 mechanical switch to A26 test port 3 bridge 1N5242-20263
W103 RF cable, A47 port 3 mechanical switch to rear-panel PORT 3 SW SRC OUT (J8) 1N5242-20282
W104 RF cable, rear-panel PORT 3 SW TSET IN (J7) to A47 port 3 mechanical switch 1N5242-20281
W105 RF cable, W7 to A48 port 4 mechanical switch 1N5242-20267
W106 RF cable, A48 port4 mechanical switch to A27 test port 4 bridge 1N5242-20261
W107 RF cable, A48 port 4 mechanical switch to rear-panel PORT 4 SW SRC OUT (J4) 1N5242-20283
W108 RF cable, rear-panel PORT 4 SW TSET IN (J3) to A48 port 4 mechanical switch 1N5242-20284
W109 RF cable, W9 to A49 port 2 mechanical switch 1N5242-20268

Installation Note N5242-90005 5
W110 RF cable, A49 port 2 mechanical switch to A28 test port 2 bridge 1N5242-20262
W111 RF cable, A49 port 2 mechanical switch to rear-panel PORT 2 SW SRC OUT (J2) 1N5242-20285
W112 RF cable, rear-panel PORT 2 SW TSET IN (J1) to A49 port 2 mechanical switch 1N5242-20286
W113 Rear panel jumper 4N5222-20091
W154 RF cable, front-panel REF 2 RCVR R2 IN to A23 mixer brick (R2) 1N5242-20308
Table 1 Contents of Upgrade Kit N5242-60104
Ref
Desig. Description Qty Part Number

6 Installation Note N5242-90005
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.
Electrostatic Discharge Protection
Protection against electrostatic discharge (ESD) is essential while removing or connecting cables or assemblies
within the network analyzer.
Static electricity can build up on your body and can easily damage sensitive internal circuit elements when
discharged. Static discharges too small to be felt can cause permanent damage. To prevent damage to the
instrument:
•always have a grounded, conductive table mat in front of your test equipment.
•always wear a grounded wrist strap, connected to a grounded conductive table mat, having a 1 MΩresistor
in series with it, when handling components and assemblies or when making connections.
•always wear a heel strap when working in an area with a conductive floor. If you are uncertain about the
conductivity of your floor, wear a heel strap.
•always ground yourself before you clean, inspect, or make a connection to a static-sensitive device or test
port. You can, for example, grasp the grounded outer shell of the test port or cable connector briefly.
Figure 1 shows a typical ESD protection setup using a grounded mat and wrist strap. Refer to “Tools and
Equipment Required for the Installation” on page 7 for part numbers.
Figure 1 ESD Protection Setup

Installation Note N5242-90005 7
Tools and Equipment 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 cable connectors. Torque these connections to 21 in-lb.
ESD Equipment and Supplies Required for the Installation
Overview of the Installation Procedure
Step 1. Remove the Outer Cover.
Step 2. Remove the Front Panel Assembly.
Step 3. Remove the Existing Test Set Cables.
Step 4. Assemble the Mechanical Switches.
Step 5. Install the Mechanical Switches.
Step 6. Remove the A19 Test Set Motherboard and the A20 IF Multiplexer Board.
Step 7. Install the Bulkhead Connectors and Jumpers on the Rear Panel.
Step 8. Install the Bulkhead Connectors in the Test Set Front Plate (For Analyzers with Serial Numbers Prefixed
MY/SG/US5310 and Below).
Step 9. Install the New Test Set Cables.
Step 10. Reinstall the A20 IF Multiplexer Board and the A19 Test Set Motherboard.
Step 11. Reinstall the Front Panel Assembly and Front Panel Jumpers.
Step 12. Position the Cables and Wires to Prevent Pinching.
Step 13. Reinstall the Outer Cover.
Step 14. Enable Option 423.
Step 15. Perform Post-Upgrade Adjustments and Calibration.
Step 16. Prepare the PNA for the User.
Description Qty Part Number
T-10 TORX driver (set to 9 in-lbs) 1N/A
T-20 TORX driver (set to 21 in-lbs) 1N/A
5/16-in torque wrench (set to 10 in-lbs) 1N/A
5/16-in torque wrench (set to 21 in-lbs) 1N/A
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

8 Installation Note N5242-90005
Step 1. Remove the Outer Cover
CAUTION This procedure is best performed with the analyzer resting on its front handles in the vertical
position. Do not place the analyzer on its front panel without the handles. This will damage the
front panel assemblies.
Refer to Figure 2 for this step of the procedure.
1. Disconnect the power cord (if it has not already been disconnected).
2. Remove the strap handles (item ①) by loosening the screws (item ✍), with a T-20 TORX driver, on both
ends until the handle is free of the analyzer.
3. Remove the foot locks (item ③) from the four bottom feet (item ④) and then remove the four bottom feet
from the outer cover.
4. Remove the four rear panel feet (item ⑤) by removing the center screws (item ⑥) with a T-20 TORX driver.
5. Slide the outer cover toward the rear of the analyzer and remove it.
Figure 2 Outer Cover Removal

Installation Note N5242-90005 9
Step 2. Remove the Front Panel Assembly
Refer to Figure 3 for this step of the procedure.
1. With a 5/16-in wrench, remove all front panel jumpers (item ①).
2. With a T-10 TORX driver, remove the screws (item ✍) from the sides of the frame.
CAUTION Before removing the front panel from the analyzer, lift and support the front of the analyzer
chassis.
3. Slide the front panel over the test port connectors.
4. Disconnect the front panel interface ribbon cable (item ③). The front panel is now free from the analyzer.
Figure 3 Front Panel Assembly Removal

10 Installation Note N5242-90005
Step 3. Remove the Existing Test Set Cables
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.
CAUTION 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.
Refer to Figure 4 for this step of the procedure.
1. Place the analyzer bottom-side up on a flat surface.
2. Remove the following cables in the order listed:
• W4 W3 (from A5 26.5 GHz source 1 board OUT 1) to A25 port 1 bridge
• W6 W5 (from A8 26.5 GHz source 2 board OUT 1) to A26 port 3 bridge
• W8 W7 (from A8 26.5 GHz source 2 board OUT 2) to A27 port 4 bridge
• W10 W9 (from A5 26.5 GHz source 1 board OUT 2) to A28 port 2 bridge
• W40 Front-panel REF 2 RCVR R2 IN to A23 mixer brick (R2)
For analyzers with serial numbers prefixed MY/SG/US5310 and below:
• W25 REF 2 SOURCE OUT to A28 port 2 bridge

Installation Note N5242-90005 11
Figure 4 Existing Test Set Cables Removal

12 Installation Note N5242-90005
Step 4. Assemble the Mechanical Switches
Refer to Figure 5 for this step of the procedure. New parts are listed in Table 1 on page 4.
1. Position each mechanical switch on a switch bracket as shown.
2. Secure each switch to its bracket using two screws (item ①, 0515-1992) for each. Make sure that the
switches are oriented as shown.
3. Position the A50 combiner on one of the switch brackets as shown. This will be the bracket with the A46
port 1 mechanical switch.
4. Secure the A50 combiner to the bracket using two screws (item ✍, 0515-1410). Make sure that the A50
combiner is oriented as shown.
Figure 5 Mechanical Switches Assembly

Installation Note N5242-90005 13
Step 5. Install the Mechanical Switches
Refer to Figure 6 for this step of the procedure. New parts are listed in Table 1 on page 4.
1. Position the switch brackets (with the switches and combiner attached) in the analyzer as shown. Make
sure that the switch bracket with the A50 combiner is in the location shown.
2. Secure the switch brackets to the analyzer test set deck using two screws (item ①, 0515-0430) each.
Figure 6 Mechanical Switches Installation into the Analyzer

14 Installation Note N5242-90005
Step 6. Remove the A19 Test Set Motherboard and the A20 IF Multiplexer Board
Remove the A19 Test Set Motherboard
Refer to Figure 7 for this part of this step of the procedure.
1. Disconnect ALL ribbon cables (item ①) and ALL wire harnesses (item ✍) from the A19 test set
motherboard. Make sure they are labeled for re-connection later.
2. Remove connector hardware (item ③) from 11 rear panel BNC connectors.
3. Remove connector hardware (item ④) from the rear panel TEST SET I/O connector.
4. Remove 10 screws (item ⑤) from the A19 test set motherboard.
5. Slide the A19 test set motherboard toward the front of the instrument until the rear panel BNC connectors
are free of the rear panel, then lift the motherboard and remove it from the analyzer.
Figure 7 A19 Test Set Motherboard Removal

Installation Note N5242-90005 15
Remove the A20 IF Multiplexer Board
Refer to Figure 8 for this part of this step of the procedure.
1. Disconnect the ribbon cable (item ①) from the A20 IF multiplexer board.
2. Disconnect ALL gray flexible RF cables (item ✍) from the A20 IF multiplexer board. Make sure they are
labeled for re-connection later.
3. Remove connector hardware (item ③) from five rear panel RF connectors.
4. Remove connector hardware (item ④) from the rear panel PULSE I/O connector.
5. Remove four screws (item ⑤) from the A20 IF multiplexer board.
6. Slide the A20 IF multiplexer board toward the front of the instrument until the rear panel connectors are free
of the rear panel, then lift the board and remove it from the analyzer.
Figure 8 A20 IF Multiplexer Board Removal

16 Installation Note N5242-90005
Step 7. Install the Bulkhead Connectors and Jumpers on the Rear Panel
1. Remove hole plugs from the following rear panel connector openings:
• PORT 1—COMB ARM IN (J9) and COMB THRU IN (J10) and SW SRC OUT (J11)
• SRC 2— SW SRC OUT (J8)
• PORT 3—SW TSET IN (J7)
• PORT 4—SW TSET IN (J3) and SW SRC OUT (J4)
• PORT 2—SW TSET IN (J1) and SW SRC OUT (J2)
Refer to Figure 9 for this part of this step of the procedure. New parts are listed in Tab l e 1 on page 4.
2. Install bulkhead connectors, lock washers (item ①) and hex nuts (item ➁) for the seven new rear panel
cables. These cables will be installed later.
3. Using a 5/16-in torque wrench set to 21 in-lbs, tighten the hex nuts on the bulkhead connectors.
4. Install the three rear panel jumpers, W113, in the locations shown (and as listed below) and torque the
jumper connectors to 10 in-lbs:
a. Jumper PORT 1 COMB THRU IN (J10) to PORT 1 SW SRC OUT (J11)
b. Jumper PORT 1 COMB ARM IN (J9) to SRC 2 SW SRC OUT (J8)
c. Jumper PORT 4 SW TSET IN (J3) to PORT 4 SW SRC OUT (J4)
d. Jumper PORT 2 SW TSET IN (J1) to PORT 2 SW SRC OUT (J2)
5. Install a 50-ohm termination (item ③) on the PORT 3 SW TSET IN (J7) connector, as indicated, and torque
the termination connector to 10 in-lbs.
Figure 9 Bulkhead Connectors and Jumpers on Rear Panel

Installation Note N5242-90005 17
Step 8. Install the Bulkhead Connectors in the Test Set Front Plate
(For Analyzers with Serial Numbers Prefixed MY/SG/US5310 and Below)
If your analyzer’s serial number is MY/SG/US5321 and above, ignore this step.
Refer to Figure 10 for this procedure. Some bulkhead connectors may already be installed on your analyzer’s
front plate. New parts are listed in Table 1 on page 4.
1. From the back side of the test set front plate, insert a bulkhead connector into a hole in the plate.
2. Install 1x washer and 1x nut. Hand tighten nut and ensure bulkhead connector hexagon nut, on the back side
of test set front plate, is aligned to the test set subpanel hexagon indent.
3. Repeat previous two steps for the remaining bulkhead connectors.
4. Torque nuts, on the front side of test set front plate, to 21 in-lbs.
Figure 10 Bulkhead Connectors Installation

18 Installation Note N5242-90005
Step 9. Install the New Test Set Cables
CAUTION Follow instructions carefully when making cable connections, especially wire harness
connections. Incorrect connections can destroy components, resulting in additional customer
costs.
CAUTION 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.
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.
Refer to Figure 11 for this part of this step. New parts are listed in Ta b le 1 on page 4.
Install the following cables in the order listed. Use a 5/16-in torque wrench set to 10 in-lbs to tighten all cable
connectors.
• W95 (N5242-20269) W3 (from A5 26.5 GHz source 1 board) to A46 port 1 mechanical switch
(connector 2)
• W96 (N5242-20264) A46 port 1 mechanical switch (connector 3) to A25 test port 1 bridge
• W97 (N5242-20287) A46 port 1 mechanical switch (connector 1) to rear-panel PORT 1 SW SRC OUT
(J11)
• W98 (N5242-20288) Rear-panel PORT 1 COMB THRU IN (J10) to A50 combiner
• W99 (N5242-20289) Rear-panel PORT 1 COMB ARM IN (J9) to A50 combiner
• W100 (N5242-20265) A50 combiner to A46 port 1 mechanical switch (connector 4)
• W101 (N5242-20266) W5 (from A8 26.5 GHz source 2 board) to A47 port 3 mechanical switch
(connector 2)
• W102 (N5242-20263) A47 port 3 mechanical switch (connector 3) to A26 test port 3 bridge
• W103 (N5242-20282) A47 port 3 mechanical switch (connector 1) to rear-panel SRC 2 SW SRC OUT
(J8)
• W104 (N5242-20281) Rear-panel PORT 3 SW TSET IN (J7) to A47 port 3 mechanical switch
(connector 4)
• W105 (N5242-20267) W7 (from A8 26.5 GHz source 2 board) to A48 port 4 mechanical switch
(connector 2)
• W106 (N5242-20261) A48 port 4 mechanical switch (connector 3) to A27 test port 4 bridge
• W107 (N5242-20283) A48 port 4 mechanical switch (connector 1) to rear-panel PORT 4 SW SRC OUT
(J4)
• W108 (N5242-20284) Rear-panel PORT 4 SW TSET IN (J3) to A48 port 4 mechanical switch
(connector 4)
• W109 (N5242-20268) W9 (from A5 26.5 GHz source 1 board) to A49 port 2 mechanical switch
(connector 2)

Installation Note N5242-90005 19
For analyzers with serial numbers prefixed MY/SG/US5310 and below:
• W25 (N5222-20038) A28 port 2 bridge to front-panel REF 2 SOURCE OUT
Secure W25 to the side of the deck with 1x cable tie wrap, part number 1400-0249 (included in the kit).
For all analyzer serial numbers:
• W154 (N5242-20308) front panel REF 2 RCVR R2 IN to A23 mixer brick (R2)
• W110 (N5242-20262) A49 port 2 mechanical switch (connector 3) to A28 test port 2 bridge
• W111 (N5242-20285) A49 port 2 mechanical switch (connector 1) to rear-panel PORT 2 SW SRC OUT
(J2)
• W112 (N5242-20286) Rear-panel PORT 2 SW TSET IN (J1) to A49 port 2 mechanical switch
(connector 4)