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Model 3701
Line Probe
User Manual
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ETS-Lindgren L.P. reserves the right to make changes to any product described
herein in order to improve function, design, or for any other reason. Nothing
contained herein shall constitute ETS-Lindgren L.P. assuming any liability
whatsoever arising out of the application or use of any product or circuit
described herein. ETS-Lindgren L.P. does not convey any license under its
patent rights or the rights of others.
© Copyright 1996–2010 by ETS-Lindgren L.P. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren L.P.
Revision Record | MANUAL 3701 | Part #399050, Rev. D
Revision Description Date
A Initial Release January, 1996
B Edits/updates January, 1999
C Updates to template/format October, 2006
D Rebrand August, 2010
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Table of Contents
Notes, Cautions, and Warnings ................................................ v
1.0 Introduction .......................................................................... 7
ETS-Lindgren Product Information Bulletin ................................................... 7
2.0 Maintenance ......................................................................... 9
Annual Calibration ......................................................................................... 9
Service Procedures ....................................................................................... 9
3.0 Specifications ..................................................................... 11
Electrical Specifications ............................................................................... 11
Physical Specifications ................................................................................ 11
4.0 Operation ............................................................................ 13
Appendix A: Warranty ............................................................. 15
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iv |
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Notes, Cautions, and Warnings
Note: Denotes helpful information intended to
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
provide tips for better use of the product.
Caution: Denotes a hazard. Failure to follow
instructions could result in minor personal injury
and/or property damage. Included text gives proper
procedures.
Warning: Denotes a hazard. Failure to follow
instructions could result in SEVERE personal injury
and/or property damage. Included text gives proper
procedures.
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1.0 Introduction
The ETS-Lindgren Model 3701 Line Probe is a wire clamp-on device that
attaches to the AC power mains providing primary power to the equipment under
test. When it is not practical to use a Line Impedance Stabilization
Network (LISN), the Model 3701 can measure conducted emissions, and may be
used to block the power mains frequency while allowing the higher frequencies
(9 kHz to 30 MHz) present on the line to be measured. The Model 3701 can also
measure the presence of conducted signals on the power mains within a facility.
The Model 3701 presents a nominal resistance of 1500 ohms to all voltages on
the line. It also attenuates noise voltage, so a correction factor must be added to
the EMI receiver readings to obtain the proper emission levels on the line.
The Model 3701 is built in accordance with FCC Rules and Regulations
Volume II, Part 15, Paragraph 8.4, Appendix A. The design and construction is
also in accordance with various international regulatory compliance standards.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS-Lindgren calibration service
• ETS-Lindgren contact information
Introduction | 7
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8 | Introduction
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2.0 Maintenance
Before performing any maintenance,
follow the safety information in the
ETS-Lindgren Product Information
Bulletin included with your shipment.
WARRANTY
Maintenance of the Model 3701 is limited
to external components such as cables
or connectors.
To prevent electrical shock, do not
remove cover.
If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.
ONLY QUALIFIED PERSONNEL should
operate or service this equipment.
Annual Calibration
See the Product Information Bulletin included with your shipment for information
on ETS-Lindgren calibration services.
Service Procedures
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.
Maintenance | 9
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10 | Maintenance
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3.0 Specifications
Electrical Specifications
Frequency Range: 9 kHz–30 MHz
Maximum AC Voltage: 250 VAC line-to-ground
Input Connector: Conductive hook with spring-loaded
plastic shroud
Output Connector: Type BNC receptacle
Installation: Indoor use only
Altitude: 4572 m maximum
15000 ft maximum
Physical Specifications
Length: 216 mm
8.5 in
Diameter: 38 mm
1.5 in
Weight: 164.4 g
5.8 oz
Specifications | 11
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12 | Specifications
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4.0 Operation
To connect to the line under test:
1. Remove power from the line under test.
2. Pull the plastic safety shroud back to expose the conductive hook.
3. Place the hook around an exposed portion of the power mains
conductor and release the plastic shroud. The spring-loaded shroud
will clamp the contact point.
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
To avoid electrical shock, do not make contact
with the power mains conductor when power is
applied through the conductor. When attaching
the Model 3701 Line Probe, always remove
power.
4. Connect a BNC cable to the coaxial connector on the end of the
Model 3701 Line Probe.
5. Apply power to the power mains.
6. Connect the opposite end of the BNC cable to the input on the
EMI receiver or spectrum analyzer.
Operation | 13
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14 | Operation
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Appendix A: Warranty
See the Product Information Bulletin included with your shipment for
the complete ETS-Lindgren warranty for your Model 3701.
DURATION OF WARRANTIES FOR MODEL 3701
All product warranties, except the warranty of title, and all remedies for warranty
failures are limited to two years.
Product Warranted Duration of Warranty Period
Model 3701 Line Probe 2 Years
Warranty | 15
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