ETS Lindgren 3850 User Manual

Model 3850/2

Line Impedance

Stabilization Network

(LISN)

User Manual

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 1996–2009 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 3850/2 | Part #399139, Rev. E

Revision Description Date

A–C Initial Release; updates December, 1996

D Rebrand October, 2008

E Added product photos February, 2009

ii |

Table of Contents

Notes, Cautions, and Warnings ................................................ v

1.0 Introduction .......................................................................... 7

ETS-Lindgren Product Information Bulletin ................................................... 7

2.0 Maintenance ......................................................................... 9

Service Procedures ....................................................................................... 9

3.0 Specifications ..................................................................... 11

Electrical Specifications ............................................................................... 11

Physical Specifications ................................................................................ 11

4.0 Installation .......................................................................... 13

Power ........................................................................................................... 14

Equipment Under Test ................................................................................. 16

Spectrum Analyzer / Receiver ..................................................................... 17

Appendix A: Warranty ............................................................. 19

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iv |

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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vi |

1.0 Introduction

The ETS-Lindgren
Model 3850/2 Line
Impedance Stabilization
Network (LISN) is a

two-channel low pass filter

network used for

conducted emissions

measurement.

The Model 3850/2 is designed to isolate the equipment under test from an

external power source while steering any radio frequency signals from the power

line to a 50-ohm port. The conducted emissions measurements may be made in

accordance with 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

2.0 Maintenance

Before performing any maintenance, follow
the safety information in the ETS-Lindgren
Product Information Bulletin included with
your shipment.

Maintenance of the Model 3850/2 is limited
to external components such as cables or
connectors.

Clean the exterior of the cabinet using a
damp cloth and mild cleaner. Always
unplug the unit before cleaning.

To prevent electrical shock, do not remove
cover.

If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.

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

3.0 Specifications

Electrical Specifications

Frequency Range: 9 kHz – 100 MHz

(VDE 0876 specified curve ± 20%

Lines Plus Ground: 2
Network Inductance: 50 µH / 250 µH
Network Impedance: 50 Ω
Current Rating: 50 Amperes
Maximum AC Voltage: 250 VAC line-to-ground

440 VAC line-to-line

Input Connectors: 50 Amperes
Output Connectors: 50 Amperes
Monitor Port: BNC

1 per line

Environmental
Installation: Indoor use only
Altitude: 15000 ft (4572 m) max
Temperature: 0°C to 40°C (32°F to 104°F)
Relative Humidity: 80% up to 31°C (87.8°F)

decreasing linearly to 50% at

°C (104°F)

40

Physical Specifications

Height: 34.9 mm (13.7 in)
Width: 51.4 mm (20.2 in)
Depth: 57.1 mm (22.5 in)
Weight: 20.4 kg (44.97 lb)

Specifications | 11

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12 | Specifications

4.0 Installation

Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.

Overcurrent protection is not provided in the
Model 3850/2. The unit must be connected to a
power mains with properly rated mains
protection.

The Model 3850/2 is provided with a protective
earthing connection. The unit should only be
connected to a mains source which utilizes a
protective earth conductor. Due to the high
leakage current to ground inherent in this type
of equipment, it is necessary to properly
connect the Model 3850/2 to an appropriate
earthing point on the power mains prior to
energizing. This earthing point should be
determined by an electrician authorized to
perform such work by appropriate code or law.
Any interruption of the protective conductor
inside or outside of the unit is likely to make the
Model 3850/2 dangerous. Intentional
interruption is prohibited.

The Model 3850/2 is provided with resistors to
help bleed off high voltage transients, but it is
advisable to connect the input and output
connectors to their proper power lines and
loads before connecting the monitor port to the
measurement instrumentation; otherwise,
power surges or transients can damage the test
instrumentation mixers or attenuators.

Installation | 13

Power

Model 3850/2 Back Panel

• The Model 3850/2 Line Impedance Stabilization Network (LISN) is

nominally designed for a 50-ampere current capacity. Maximum

line-to-line voltage must not exceed the voltage rating of the power

connectors provided on the input and output of the unit. See

Specifications on page 11 for the applicable maximum value.

14 | Installation

• The input power connection to

the line side of the Model 3850/2

is made through the red and
black pin receptacles labeled L1
and L2 on the back panel.

Power to the Model 3850/2

should be through a properly

rated circuit breaker and/or a

switch which can remove power

from the unit in case of

emergency. This device should

be installed near the

Model 3850/2.

• The green pin receptacle and

the brass lug terminal are both

connected to chassis ground.

Prior to energizing the

Model 3850/2, the earth

connection from the power

mains must be connected to the

green pin receptacle.

• The brass lug terminal should be bonded to the ground plane of the

conducted emissions test setup. This line does not provide high frequency

isolation and should not carry any voltage above earth potential.

Installation | 15

Equipment Under Test

Model 3850/2 Front Panel

• The Equipment Under Test

(EUT) is connected to the

Model 3850/2 through the red

and black socket receptacles

located on the front panel.

• The ground connection to the

EUT is made through the green

socket receptacle.

• In normal operation, the radio

frequency bonding stud on the

front panel should be connected

to the ground plane of the

conducted emissions test setup

by a grounding strap or braid.

16 | Installation

Spectrum Analyzer / Receiver

• Use the BNC connectors on the front panel to connect the spectrum

analyzer or EMI receiver. See page 16 for a view of the front panel

connectors.

• The monitor port which is not being monitored should be terminated

into a coaxial 50-ohm terminator.

Connect the input and output terminals to their proper mains

connections and EUT connections before connecting the monitor port

to the measurement instrumentation; otherwise, power surges may

damage the test instrumentation mixers or attenuators.

• Removal of a terminator and connection to the BNC receptacle will not

generate power surges.

• When the power is to be disconnected, remove the coaxial connection

to the measurement instrumentation first to avoid possible damage.

Installation | 17

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18 | Installation

Appendix A: Warranty

See the Product Information Bulletin included with your shipment for

the complete ETS-Lindgren warranty for your Model 3850/2 Line

Impedance Stabilization Network (LISN).

DURATION OF WARRANTIES FOR MODEL 3850/2

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 3850/2 Line Impedance

Stabilization Network (LISN)

2 Years

Warranty | 19