Model 3725/2M 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 1995–2010 by ETS-Lindgren L.P. All Rights Reserved.
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.
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Notes, Cautions, and Warnings Note: Denotes helpful information intended to 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 3725/2M Line Impedance Stabilization Network (LISN) is a two-channel low pass filter network 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. A 50 µH inductor is used per channel.
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2.0 Maintenance Only trained service personnel should perform adjustments and/or service procedures. Inside the Model 3725/2M are LETHAL voltages with which you could come into contact. Capacitors inside the unit may still be CHARGED even when the unit is disconnected from power. Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment.
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3.0 Specifications Electrical Specifications Frequency Range: 10 kHz–100 MHz Network Inductance: 50 µH Network Impedance: Nominal 50 ohms per MIL-STD-461F Current Rating: 25 Amps Maximum AC Voltage: 250 VAC line-to-ground Input/Output Connector: Dual binding posts Environmental Installation: Indoor use only Altitude: 4572 m (15000 ft) max Temperature: 0°C to 40°C (32°F to 104°F) Relative Humidity: 80% up to 31°C (87.
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4.0 Installation and Application 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 3725/2M. The unit must be connected to a power mains which has appropriately rated mains protection installed.
The Model 3725/2M Line Impedance Stabilization Network (LISN) is nominally designed for a current capacity of 25 amperes. This rating may be increased to 30 amperes provided that the duty cycle is reduced to 20% to allow for heat dissipation. Maximum line-to-line voltage must not exceed the maximum voltage rating of the unit. See Specifications on page 11 for the applicable maximum value. The Model 3725/2M is designed for use in Installation Category II and Pollution Degree II per lEC-1010 and IEC-664.
Back Panel Connectors POWER INPUT The input power connection is made through the dual binding post connections. A properly-rated circuit breaker or switch which removes mains power from the Model 3725/2M should be installed in proximity to the unit. RF GROUND See the description on page 14.
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5.0 Data Characterizations for each measurement port of the Model 3725/2M Line Impedance Stabilization Network (LISN) are included with the unit. The graphs provide individual plots of both impedance and insertion loss data. Impedance is plotted in a semi-log format where frequency is displayed on the horizontal from 10 kHz to 100 MHz. The vertical has a range of 0 ohms to 100 ohms and represents the measured impedance of the unit.
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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 3725/2M. DURATION OF WARRANTIES FOR MODEL 3725/2M All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years.
