Keysight U7227A Service manual

Keysight U7227A/C/F
USB Pre-Amplifier
Operating and
Service Manual

2 Keysight U7227A/C/F Operating and Service Manual
Notices
Copyright Notice
© Keysight Technologies 2015 - 2019
No part of this manual may be repro-
duced 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 Technol-
ogies as governed by United States and
international copyright laws.
Manual Part Number
U7227-90001
Edition
Edition 5, November 29, 2019
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
Technology Licenses
The hardware and/or software
described in this document are fur-
nished under a license and may be
used or copied only in accordance with
the terms of such license.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight prod-
ucts may be downloaded from the
Web. Go to http://www.keysight.com/
go/conformity. You can then search by
product number to find the latest Dec-
laration of Conformity.
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal Acqui-
sition Regulation (“FAR”) 2.101. Pursu-
ant to FAR 12.212 and 27.405-3 and
Department of Defense FAR Supple-
ment (“DFARS”) 227.7202, the U.S.
government acquires commercial com-
puter software under the same terms
by which the software is customarily
provided to the public. Accordingly,
Keysight provides the Software to U.S.
government customers under its stan-
dard commercial license, which is
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 may use,
modify, distribute, or disclose the Soft-
ware. The EULA and the license set
forth therein, does not require or per-
mit, among other things, that Keysight:
(1) Furnish technical information
related to commercial computer soft-
ware or commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish
to, or otherwise provide, the govern-
ment rights in excess of these rights
customarily provided to the public to
use, modify, reproduce, release, per-
form, display, or disclose commercial
computer software or commercial com-
puter software documentation. No
additional government requirements
beyond those set forth in the EULA
shall apply, except to the extent that
those terms, rights, or licenses are
explicitly required from all providers of
commercial computer software pursu-
ant to the FAR and the DFARS and are
set forth specifically in writing else-
where in the EULA. Keysight shall be
under no obligation to update, revise or
otherwise modify the Software. With
respect to any technical data as
defined by FAR 2.101, pursuant 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 FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any
technical data.
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 DIS-
CLAIMS ALL WARRANTIES, EITHER
EXPRESS OR IMPLIED, WITH REGARD
TO THIS MANUAL AND ANY INFORMA-
TION CONTAINED HEREIN, INCLUD-
ING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSE-
QUENTIAL DAMAGES IN CONNECTION
WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT
OR OF ANY INFORMATION CON-
TAINED HEREIN. SHOULD KEYSIGHT
AND THE USER HAVE A SEPARATE
WRITTEN AGREEMENT WITH WAR-
RANTY TERMS COVERING THE MATE-
RIAL IN THIS DOCUMENT THAT
CONFLICT WITH THESE TERMS, THE
WARRANTY TERMS IN THE SEPARATE
AGREEMENT SHALL CONTROL.
Safety Information
CAUTION
A CAUTION notice denotes a hazard. It
calls attention to an operating proce-
dure, 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 pro-
ceed beyond a CAUTION notice until
the indicated conditions are fully
understood and met.
WARNING
A WARNING notice denotes a hazard. It
calls attention to an operating proce-
dure, 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.

Keysight U7227A/C/F Operating and Service Manual 3
Regulatory Markings
The CE mark is a registered trademark of the
European Community. This CE mark shows that
the product complies with all the relevant
European Legal Directives.
ICES/NMB-001 indicates that
this ISM device complies with the
Canadian ICES-001.
Cet appareil ISM est conforme a
la norme NMB-001 du Canada.
The RCM mark is a registered trademark of the
Spectrum Management Agency of Australia.
This signifies compliance with the Australia EMC
Framework regulations under the terms of the
Radio Communication Act of 1992.
This symbol indicates the time
period during which no
hazardous or toxic substance
elements are expected to leak or
deteriorate during normal use.
Forty years is the expected useful
life of the product.
This instrument is Class A suitable for
professional use and is for use in
electromagnetic environments outside of the
home.
This instrument complies with
the WEEE Directive (2002/96/EC)
marking requirement. This affixed
product label indicates that you
must not discard this electrical or
electronic product in domestic
household waste.
MSIP-REM-ATi-
WNU7227ACF

4 Keysight U7227A/C/F Operating and Service Manual
Waste Electrical and Electronic Equipment (WEEE) Directive
This instrument complies with the WEEE Directive marking requirement. This
affixed product label indicates that you must not discard this electrical or
electronic product in domestic household waste.
Product category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
–www.keysight.com/find/mta
(product-specific information and support, software and
documentation updates)
–www.keysight.com/find/assist
(worldwide contact information for repair and service)

Keysight U7227A/C/F Operating and Service Manual 5
Table of Contents
Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . . .4
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1 Getting Started
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Key features of the U7227A/C/F USB pre-amplifier . . . . . . . . . . . . .13
2Installation
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Verify the U7227A/C/F Shipment Contents . . . . . . . . . . . . . . . . . . . . . .17
Service and Recalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Operating and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
ESD damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Connector care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Cable handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
USB Pre-Amplifiers Covered by this Guide . . . . . . . . . . . . . . . . . . . . . .22
Signal Analyzer Retrofit Requirements . . . . . . . . . . . . . . . . . . . . . . . . .23
N9010A, N9020A, or N9030A signal analyzer . . . . . . . . . . . . . . . . .23
3OperatingGuides
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Operator’s check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Service and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

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Keysight U7227A/C/F Operating and Service Manual 7
List of Figures
Figure 1-1 U7227A/C/F USB pre-amplifier . . . . . . . . . . . . . . . . . .12
Figure 2-1 Cable handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 2-2 U7227A/C/F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 3-1 Quick-check configuration for the S-parameter test .26

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Keysight U7227A/C/F Operating and Service Manual 9
List of Tables
Table 2-1 U7227A/C contents . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 2-2 U7227F contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 3-1 S-parameter measurement parameters . . . . . . . . . . .27
Table 3-2 Noise figure measurement parameters . . . . . . . . . . . .28

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Keysight U7227A/C/F USB Pre-Amplifier
Operating and Service Manual
11
1 Getting Started
Product Overview 12
This chapter provides an overview of the Keysight U7227A/C/F USB pre-amplifier

1 Getting Started
12 Keysight U7227A/C/F Operating and Service Manual
Product Overview
The Keysight U7227A/C/F USB pre-amplifier which operates up to 50 GHz is a
general-purpose low noise amplifier that offers reliable gain and low noise figure.
With the ability to be powered directly using USB connectivity, it eliminates the
need for a separate power supply which presents an invaluable alternative for you
to optimize the efficiency of your test system. Compact, with a rugged and
portable design, this USB pre-amplifier is suitable for benchtop measurements or
remote front-end field applications.
The U7227A/C/F USB pre-amplifier provides a simple means to achieve accurate
and repeatable noise figure measurements on low-noise low-gain devices, using
Keysight X-series analyzers. The total solution will provide performance and
ease-of-use exceeding competitive signal analyzer based solutions.
Figure 1-1 U7227A/C/F USB pre-amplifier

Getting Started 1
Keysight U7227A/C/F Operating and Service Manual 13
Key features of the U7227A/C/F USB pre-amplifier
– Automatic gain correction value with temperature compensation and transfer
of calibration data (noise figure and S-parameters) through USB
plug-and-play features for improved noise figure measurements with Keysight
X-series analyzers
– Excellent noise figure and optimized gain with the X-series signal analyzers
improve measurement accuracy and minimize uncertainty
– Provides ultra-broadband operating frequency from 10 MHz up to 50 GHz for
various application needs
– Rugged and portable design for benchtop measurements or remote front-end
applications

1 Getting Started
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Keysight U7227A/C/F USB Pre-Amplifier
Operating and Service Manual
15
2 Installation
Initial Inspection 16
Verify the U7227A/C/F Shipment Contents 17
Service and Recalibration 18
Operating and Safety Precautions 19
USB Pre-Amplifiers Covered by this Guide 22
Signal Analyzer Retrofit Requirements 23
This chapter provides you important information on how to check and prepare
your instrument for operation.

2Installation
16 Keysight U7227A/C/F Operating and Service Manual
Initial Inspection
1Unpack and inspect the shipping container and its contents thoroughly to
ensure that nothing was damaged during shipment. If the shipping container
or cushioning material is damaged, the contents should be checked both
mechanically and electrically.
– Check for mechanical damage such as scratches or dents.
– Procedures for checking electrical performance are given under “Operator’s
check” on page 26.
2If the contents are damaged or defective, contact your nearest Keysight
Technologies Service and Support Office. Refer to “Sales and Technical
Support” on page 4 of this manual. Keysight Technologies will arrange for
repair or replacement of the damaged or defective equipment. Keep the
shipping materials for the carrier's inspection.
3If you are returning the instrument under warranty or for service, repackaging
the instrument requires original shipping containers and material or their
equivalents. Keysight Technologies can provide packaging materials identical
to the original materials. Refer to “Sales and Technical Support” on page 4 of
this manual for the Keysight Technologies nearest to you. Attach a tag
indicating the type of service required, return address, model number, and
serial number. Mark the container FRAGILE to insure careful handling. In any
correspondence, refer to the instrument by model number and serial number.

Installation 2
Keysight U7227A/C/F Operating and Service Manual 17
Verify the U7227A/C/F Shipment Contents
The following table lists the items that are shipped with the U7227A/C/F.
Table 2-1 U7227A/C contents
Quantity Description Part number
1 Certificate of Calibration 5962-0476
1 3.5 mm (f) to Type-N (m) adapter 1250-1744
Table 2-2 U7227F contents
Quantity Description Part number
1 Certificate of Calibration 5962-0476
1 2.4 mm (f) to 2.4 mm (f) adapter 85056-60006

2Installation
18 Keysight U7227A/C/F Operating and Service Manual
Service and Recalibration
If your U7227A/C/F USB pre-amplifier requires service or repair, contact the
nearest Keysight office for information on where to send it. Refer to “Sales and
Technical Support” on page 4 of this manual. The performance of the U7227A/C/
F can only be verified by specially-manufactured equipment and calibration
standard from Keysight. The recommended interval for recalibration is 12 months.

Installation 2
Keysight U7227A/C/F Operating and Service Manual 19
Operating and Safety Precautions
Observe the following guidelines before connecting or operating the U7227A/C/F
USB pre-amplifier.
ESD damage
Protection against electrostatic discharge (ESD) is important while handling and
operating the U7227A/C/F USB pre-amplifier.
Static electricity can build up on your body and can easily damage sensitive
components when discharged.
Static discharges too small to be felt can cause permanent damage to the unit.
To prevent damage from ESD:
–Use a grounded antistatic mat in front of your test equipment and wear a
grounded wrist strap attached to it when handling or operating the
U7227A/C/F.
–Wear a heel strap when working in an area with a conductive floor.
–Ground yourself before you clean, inspect, or make a connection to the
U7227A/C/F. You can, for example, grasp the grounded outer shell of the
analyzer test port or cable connector briefly.
–Avoid touching the exposed connector pins.

2Installation
20 Keysight U7227A/C/F Operating and Service Manual
Connector care
Because connectors can become defective due to wear during normal use, all
connectors should be inspected and maintained to maximize their service life.
– Inspect the mating surface each time a connection is made. Metal particles
from connector threads often find their way onto the mating surface when a
connection is made or disconnected.
– Clean dirt and contamination from the connector mating surface and threads.
This simple step can extend the service life of the connector and improve the
quality of your calibration and measurements.
– Gage connectors periodically. This not only provides assurance of proper
mechanical tolerances, and thus connector performance, but can also indicate
situations where the potential for damage to another connector may exist.
CAUTION
The U7227A/C/F can be damaged if excessive torque is applied to the
connectors.
The recommended torque value is 8 lb-in for 2.4 mm and 3.5 mm type
connectors.
For the input port, the recommended torque wrench is 20 mm with part
number 8710-1764.
For the output port, the recommended torque wrench is 5/16" with part
number 8710-1765.