Keysight N9038B Quick start guide

Option EXM, External Mixing Upgrade Kit
Keysight Technologies
N9048B PXE EMI Receiver
N9038B MXE EMI Receiver, Multi-Touch
Installation Note

Notices
© Copyright 2019 - 2022 Keysight Technologies, Inc.
The information contained in this document is subject to change without notice.
Keysight Technologies makes no warranty of any kind with regard to this material, including but
not limited to, the implied warranties of merchantability and fitness for a particular purpose.
Keysight Technologies shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this material.
Manual Part Number
N9048-90017
Edition
Edition 1, July 2022
Supersedes October 2020
Printed in USA/Malaysia
Published by:
Keysight Technologies, Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA 95403

Installation Note N9048-90017 3
Option EXM, External Mixing Upgrade Kit
Option EXM, External Mixing Upgrade Kit
Software and test equipment is required for making adjustments and for performance verification
testing.
Information on how to obtain this software can be found at:
www.keysight.com/find/calibrationsoftware
While Keysight does recommend that a full calibration be performed after the installation of this
upgrade, the end user must ultimately determine whether they want this service or not. If a full
calibration is required, arrangements regarding the level of calibration must be made between the
end user and the calibration provider.
Introduction
This kit includes parts to upgrade a N9048B PXE EMI Receiver or N9038B MXE EMI Receiver,
Multi-Touch to add Option EXM, External Mixing. This kit includes parts to upgrade a PXE or MXE
regardless of frequency range option installed. As a result, some parts included in this kit will not be
needed for upgrading some analyzers.
In addition to installing the hardware to support Option EXM, a license for the following option will
also be installed:
— N9048B-EXM, External Mixing
or
— N9038B-EXM, External Mixing
Products Affected: N9048B PXE EMI Receiver
N9038B MXE EMI Receiver, Multi-Touch
Serial Numbers: All
To Be Performed By: (X) Keysight Service Center
(X) Personnel Qualified by Keysight
( ) Customer
Estimated Installation Time:
Estimated Adjustment Time:
Estimated Verification Time:
1.5 Hours
1.0 Hoursa
4.0 Hoursa
a.To ensure that these newly installed options are functioning properly, the procedure that follows includes the
requirement of performing certain adjustments and performance verification tests. However, the completion of
these tests does not guarantee that the instrument meets all advertised specifications.

4Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
Installation Kit Parts List
Quantity Description Keysight Part Number
1 Adapter-Coaxial straight Female-SMA Female-SMA 50 Ohm 1250-1666
1 Washer-Lock Internal-Tooth 1/4-in 0.256-in-ID 2190-0067
1 Nut-HEX-DBL-CHAM 1/4-36-THD .125-in-THK Stainless Steel 2950-0223
1 Cable Assembly, External Mixing, Front Panel N9020-20166
1 Label, Warning N9030-80018
1 Cable Assembly, uW N9020-20132
1 Cable Assembly, mmW N9020-20167
1 Cable Assembly-Coaxial A12/A32 50-Ohm 350 mm-LG 8121-2027
2 EMI O-ring 8160-1637
16 Screw-Machine W/Patch-Lock 90-DEG-flat-HD Torx-T10 M3X0.5 6mm-LG
SST 300 passivated
0515-1946
8 Screws, Machine W/Patch-Lock 90-DEG-Flat-HD Torx-T10 M3X0.5 8mm-LG
SST-300 passivated finish
0515-2032
3 Cable Ties 1400-0249
1 Entitlement Certificate -----
1 Installation Note N9048-90017

Installation Note N9048-90017 5
Option EXM, External Mixing Upgrade Kit
Tools Required
— T-10 TORX Driver
— T-20 TORX Driver
— 5/16-inch torque wrench
— ¼-inch open-end wrench
—Diagonalcutters
— Keysight Calibration and Adjustment Software, N7818A (revision A.10.00 or later)
— Test equipment and computer supported by the X- Series Performance Tests and Adjustment
Software
— PXE or MXE Service Guide.
— Microsoft Windows based personal computer with internet access and USB port
— USB storage device with > 2 GB free memory
Initial Instrument Functionality Check
Power on the instrument and allow the instrument to boot up. Run an alignment and display the
measurement screen. (The instrument will probably display a spectrum analyzer screen and you will
see the instrument sweeping.)
There should be no alignment failures. If there are failures, investigate and fix the problem before
continuing.
Before you disassemble the instrument, turn the power switch to Standby. After the instrument
has completely shut down, unplug the instrument. Failure to unplug the instrument can result in
personal injury.
Electrostatic discharge (ESD) can damage or destroy electronic components. All work on
electronic assemblies should be performed at a static-safe workstation. Refer to the
documentation that pertains to your instrument for information about static-safe workstations
and ordering static-safe accessories.

6Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
Analyzer Disassembly
1. Disconnect the instrument from ac power.
2. Refer to Figure 1. Using the T-20 driver, remove the 4 screws (1) (two on each side) that
attach the handle strap (2) on each side of the instrument.
3. Remove the four key locks from the instrument four bottom feet.
4. Remove the four instrument bottom feet (6).
5. Using the T-20 driver, remove the four screws (including washers) (3) that hold the rear feet
(4) in place.
6. Pull the instrument cover (5) off towards the rear of the instrument.
Figure 1 Instrument Outer Case Removal
If the instrument is placed on its face during any of the following procedures, be sure to use a soft
surface or soft cloth to avoid damage to the front panel, keys, or input connector.
Make sure any adapters on the front panel are removed.

Installation Note N9048-90017 7
Option EXM, External Mixing Upgrade Kit
Top Brace Removal
Refer to Figure 2. To remove the top brace (1), use the T-10 driver to remove the twelve screws (3)
(0515-0372) attaching the top brace to the chassis. Remove the wire holddown (as shown in Figure
3). Remove and discard the fourteen screws (or sixteen with Option WF1) (4) (0515-1946)
attaching the top brace to the boards.
Figure 2 Top Brace Removal

8Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
Figure 3 Wire Holddown

Installation Note N9048-90017 9
Option EXM, External Mixing Upgrade Kit
Front Frame Assembly Removal
1. Refer to Figure 4. Using the T-10 driver, remove the eight screws (1), four on each side, to
detach the Front Frame Assembly from the chassis. Discard these screws.
Figure 4 Front Frame Removal (PXE shown as example)
Make sure any connectors on the front panel are removed.

10 Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
2. Refer to Figure 5. Pull the Front Frame Assembly carefully away from the chassis. Remove the
ribbon cable W1 from the motherboard. The cable has locking tabs on each side, pinch and
pull to release.
Figure 5 Front Panel Cable

Installation Note N9048-90017 11
Option EXM, External Mixing Upgrade Kit
Add Cables to A13 Front End and A15 Front End Controller, RF/Microwave
Instruments
1. Locate the flexible coax cable in the Opt EXM Cable Kit. This is cable W30 and should be
labeled "8121-2027".
2. Refer to Figure 6. Connect the end of W30 labeled “903” to A15J903.
Figure 6 A15J903
This procedure only applies to RF and microwave instruments (frequency range options 503, 508,
and 526). If your instrument has frequency range option 544 or 550, refer to “Add Cables to
A13 Front End and A15 Front End Controller, Millimeter Wave Instruments” which
follows.

12 Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
3. Refer to Figure 6. Remove the SMA 50 Ωloads on A13A1J8 and A13A1J13. Do not discard.
Figure 7 50 ohm Loads

Installation Note N9048-90017 13
Option EXM, External Mixing Upgrade Kit
4. Refer to Figure 8. Connect the end of W30 labeled “13” to A13A1J13. Torque the cable nut to
10 inch-pounds.
Figure 8 A13A1J13

14 Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
5. Refer to Figure 9 and Figure 10. Use tie wraps at the locations indicated to secure W30 to the
semi-rigid cables and to the wire harness.
Figure 9 W30 Tie Wraps
Figure 10 W30 Tie Wraps

Installation Note N9048-90017 15
Option EXM, External Mixing Upgrade Kit
6. Locate semi-rigid coax cable, part number N9020-20132 in the upgrade kit. This is W17.
Connect the end with the SMA male connector A13A1J8, with the SMA female connector
pointing towards where the front panel would be. The long, straight section of W17 should be
parallel to the casting of the A13 Front End and parallel to the side chassis. Refer to Figure 11.
Torque the cable nut to 10 inch-pounds.
Figure 11 Orientation of W17 in an RF/Microwave PXEA

16 Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
Add Cables to A13 Front End and A15 Front End Controller, Millimeter Wave
Instruments
1. Locate the flexible coax cable in the Opt EXM Cable Kit. This is cable W30 and should be
labeled "8121-2027".
2. Refer to Figure 12. Connect the end of W30 labeled “903” to A15J903.
Figure 12 A15J903
This procedure only applies to Millimeter Wave instruments (frequency range options 544 and
550). If your instrument has frequency range option 503, 508, or 526, refer to “Add Cables to
A13 Front End and A15 Front End Controller, RF/Microwave Instruments” above.

Installation Note N9048-90017 17
Option EXM, External Mixing Upgrade Kit
3. Refer to Figure 13. Remove the 50 Ω loads on J8 and J13 if present. Connect the end of W30
labeled “13” to A13A1J13. Torque the cable nut to 10 inch-pounds. Route the cable as shown.
Figure 13 W17 and W30
4. Refer to Figure 13. Locate semi-rigid coax cable, part number N9020-20167 in the upgrade kit.
This is W17. Connect the end with the SMA male connector A13A1J8, with the SMA female
connector pointing towards where the front panel would be. The long, straight section of W17
should be parallel to the casting of the A13 Front End and level. Torque the cable nut to
10 inch-pounds.

18 Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
5. Refer to Figure 14. Use tie wraps at the locations indicated to secure W30 to the semi-rigid
cables and to the wire harness.
Figure 14 W30 Tie Wraps

Installation Note N9048-90017 19
Option EXM, External Mixing Upgrade Kit
Add EXT MIXER Connector and Cable to Front Frame Assembly
1. Locate the SMA female to SMA female connector (1250-1666), ¼” lockwasher (2190-0067),
and ¼” hex nut (2950-0223) in the kit. If the SMA connector includes hardware, discard that
hardware and use the 2190-0067 lockwasher and 2950-0223 hex nut included in this kit.
2. Remove the hole-plug in the top-most hole in the upper right corner of the front frame
assembly. This hole will be labeled “EXT MIXER”.
3. Insert the SMA female to SMA female connector in the hole in the front frame assembly from
the front of the assembly. The hex feature on the connector should engage with the recess in
the front frame assembly. Refer to Figure 15. Secure the connector using the ¼” lockwasher
and ¼” hex nut from the rear. Torque to 21 inch-pounds.
Figure 15 Attaching SMA Female Connector
4. Locate the External Mixing, Front Panel semi-rigid coax assembly in the kit, part number
N9020-20166. This is W29. Note that this cable is symmetrical; either end can be connected to
the front-panel connector.

20 Installation Note N9048-90017
Option EXM, External Mixing Upgrade Kit
5. Connect one end of W29 to the SMA female connector as shown in Figure 16.
6. Orient W29 so that the cable slopes upward from the Ext Mixer connector at a 15 degree
angle. The top of the connector should be approximately level with the top of the shield over
the Front Panel Interface board. Refer to Figure 17. Torque the cable nut on the Ext Mixer
connector to 10 inch-pounds.
Figure 16 Connecting W29 to Ext Mixer Connector
Figure 17 Proper Orientation of W29