User Guide
Near-Field Probe Set
Anritsu Part Number: 2000-1689
Anritsu Company
490 Jarvis Drive
Morgan Hill, CA 95037-2809
USA
http://www.anritsu.com
Part Number: 10580-00347
Published: April 2012
Copyright 2012 Anritsu Company
Revision: A
WARRANTY
The Anritsu product(s) listed on the title page is (are) warranted against defects in materials and
workmanship for one year from the date of shipment.
Anritsu’s obligation covers repairing or replacing products which prove to be defective during the
warranty period. Buyers shall prepay transportation charges for equipment returned to Anritsu for
warranty repairs. Obligation is limited to the original purchaser. Anritsu is not liable for consequential
damages.
LIMITATION OF WARRANTY
The foregoing warranty does not apply to Anritsu connectors that have failed due to normal wear. Also,
the warranty does not apply to defects resulting from improper or inadequate maintenance by the
Buyer, unauthorized modification or misuse, or operation outside of the environmental specifications of
the product. No other warranty is expressed or implied, and the remedies provided herein are the
Buyer’s sole and exclusive remedies.
DISCLAIMER OF WARRANTY
DISCLAIMER OF WARRANTIES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE
LAW, ANRITSU COMPANY AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH REGARD TO THE
PRODUCT. THE USER ASSUMES THE ENTIRE RISK OF USING THE PRODUCT. ANY LIABILITY
OF PROVIDER OR MANUFACTURER WILL BE LIMITED EXCLUSIVELY TO PRODUCT
REPLACEMENT.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. TO THE MAXIMUM EXTENT PERMITTED BY
APPLICABLE LAW, IN NO EVENT SHALL ANRITSU COMPANY OR ITS SUPPLIERS BE LIABLE
FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY
LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE THE PRODUCT, EVEN IF ANRITSU
COMPANY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME
STATES AND JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE LIMITATION MAY
NOT APPLY TO YOU.
NOTICE
Anritsu Company has prepared this manual for use by Anritsu Company personnel and customers as a
guide for the proper installation, operation and maintenance of Anritsu Company equipment and
computer programs. The drawings, specifications, and information contained herein are the property of
Anritsu Company, and any unauthorized use or disclosure of these drawings, specifications, and
information is prohibited; they shall not be reproduced, copied, or used in whole or in part as the basis
for manufacture or sale of the equipment or software programs without the prior written consent of
Anritsu Company.
UPDATES
Updates, if any, can be downloaded from the Documents area of the Anritsu Website at:
http://www.anritsu.com
For the latest service and sales contact information in your area, please visit:
http://www.anritsu.com/contact.asp
CE Conformity Marking
Anritsu affixes the CE Conformity marking onto its conforming products in accordance with
Council Directives of The Council Of The European Communities in order to indicate that
these products conform to the EMC and LVD directive of the European Union (EU).
C-tick Conformity Marking
Anritsu affixes the C-tick marking onto its conforming products in accordance with the
electromagnetic compliance regulations of Australia and New Zealand in order to indicate
that these products conform to the EMC regulations of Australia and New Zealand.
Notes On Export Management
This product and its manuals may require an Export License or approval by the government
of the product country of origin for re-export from your country.
Before you export this product or any of its manuals, please contact Anritsu Company to
confirm whether or not these items are export-controlled.
When disposing of export-controlled items, the products and manuals need to be broken or
shredded to such a degree that they cannot be unlawfully used for military purposes.
Safety Symbols
To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu
Company uses the following symbols to indicate safety-related information. For your own
safety, please read the information carefully before operating the equipment.
Symbols Used in Manuals
Danger
This indicates a risk from a very dangerous condition or procedure that
could result in serious injury or death and possible loss related to equipment
malfunction. Follow all precautions and procedures to minimize this risk.
Warning
Caution
This indicates a risk from a hazardous condition or procedure that could
result in light-to-severe injury or loss related to equipment malfunction.
Follow all precautions and procedures to minimize this risk.
This indicates a risk from a hazardous procedure that could result in loss
related to equipment malfunction. Follow all precautions and procedures to
minimize this risk.
Safety Symbols Used on Equipment and in Manuals
The following safety symbols are used inside or on the equipment near operation locations to
provide information about safety items and operation precautions. Ensure that you clearly
understand the meanings of the symbols and take the necessary precautions before operating
the equipment. Some or all of the following five symbols may or may not be used on all
Anritsu equipment. In addition, there may be other labels attached to products that are not
shown in the diagrams in this manual.
This indicates a prohibited operation. The prohibited operation is indicated
symbolically in or near the barred circle.
This indicates a compulsory safety precaution. The required operation is
indicated symbolically in or near the circle.
This indicates a warning or caution. The contents are indicated symbolically
in or near the triangle.
This indicates a note. The contents are described in the box.
These indicate that the marked part should be recycled.
Near-Field Probe Set UG PN: 10580-00347 Rev. A Safety-1
For Safety
Warning
Warning
Warning
Always refer to the operation manual when working near locations at
which the alert mark, shown on the left, is attached. If the operation,
etc., is performed without heeding the advice in the operation
manual, there is a risk of personal injury. In addition, the equipment
performance may be reduced. Moreover, this alert mark is sometimes
used with other marks and descriptions indicating other dangers.
When supplying power to this equipment, connect the accessory
3-pin power cord to a 3-pin grounded power outlet. If a grounded
3-pin outlet is not available, use a conversion adapter and ground the
green wire, or connect the frame ground on the rear panel of the
equipment to ground. If power is supplied without grounding the
equipment, there is a risk of receiving a severe or fatal electric shock.
This equipment can not be repaired by the operator. Do not attempt to
remove the equipment covers or to disassemble internal
components. Only qualified service technicians with a knowledge of
electrical fire and shock hazards should service this equipment.
There are high-voltage parts in this equipment presenting a risk of
severe injury or fatal electric shock to untrained personnel. In
addition, there is a risk of damage to precision components.
Caution
Electrostatic Discharge (ESD) can damage the highly sensitive
circuits in the instrument. ESD is most likely to occur as test devices
are being connected to, or disconnected from, the instrument’s front
and rear panel ports and connectors. You can protect the instrument
and test devices by wearing a static-discharge wristband.
Alternatively, you can ground yourself to discharge any static charge
by touching the outer chassis of the grounded instrument before
touching the instrument’s front and rear panel ports and connectors.
Avoid touching the test port center conductors unless you are
properly grounded and have eliminated the possibility of static
discharge.
Repair of damage that is found to be caused by electrostatic
discharge is not covered under warranty.
Safety-2 PN: 10580-00347 Rev. A Near-Field Probe Set UG
Table of Contents
Chapter 1—General Information
1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Magnetic (H) Field Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Electric (E) Field Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-2 Typical Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1-3 Probe Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2—Performance and Usage
2-1 Typical Performance Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 Field Strength Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-3 Locating Radiating Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Signal Sourcing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Using EMI (Sniffer) Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2-4 Common and Differential Mode Current Flow . . . . . . . . . . . . . . . . . . . . . . 2-7
2-5 Differential Mode Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2-6 Common Mode Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2-7 Pre-Screening Alternate Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Evaluating Alternate Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Near-Field Probe Set UG PN: 10580-00347 Rev. A Contents-1
Table of Contents (Continued)
Contents-2 PN: 10580-00347 Rev. A Near-Field Probe Set UG
Chapter 1 — General Information
1-1 Introduction
The Anritsu Near-Field Probe set (p/n: 2000-1689) includes three magnetic (H) field and two
electric (E) field probes designed for use in the resolution of emission problems. The set also
includes a 20 cm extension handle and comes in a wood carrying case.
The probe set provides a means of accurately detecting H-field and E-field emissions, while
the 20 cm extension handle provides access to remote areas in larger units. Made of injection
molded industrial grade plastic, the probes are durable, light weight, and compact.
The probes offer a fast and easy means of detecting and identifying signal sources which may
cause a product from meeting federal regulatory requirements. The probe set is a convenient
and inexpensive tool for extending the capability of your Anritsu spectrum analyzer.
A near-field probe is an essential tool for quick and efficient EMC/EMI engineering. Using
near-field probes and a spectrum analyzer can produce the following results:
• Gain information about the source and location of the radiation member.
• Reduce test expense by adding inexpensive equipment for solving EMC/EMI problems.
• Reduce test time by pre-screening various solutions and alternate implementations.
Table 1-1. Anritsu’s 2000-1689 Near Field Probe Set
Model Sensor Type E/H or H/E Rejection Upper Frequency
901 6 cm loop H-Field 41 dB 790 MHz
902 3 cm loop H-Field 29 dB 1.5 GHz
903 1 cm loop H-Field 11 dB 2.3 GHz
904 3.6 cm ball E-Field 30 dB > 1 GHz
905 6 mm stub tip E-Field 30 dB > 3 GHz
Near-Field Probe Set UG PN: 10580-00347 Rev. A 1-1