Table of Contents
Summary of Contents for TTI LISN 1600
- Page 1 LISN 1600 Line Imperdance Stabilisation Network Instruction Manual Thurlby Thandar Instruments Limited Glebe Road, Huntingdon, Cambridgeshire. PE18 7DX England Telephone: 01480 412451 Fax: 01480 450409 Book Part No. 48511 - 0250 Issue 2...
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Page 2: Table Of Contents
Because of the importance of EMC, and its commercial impact, great Contents effort has been expended over recent years in designing methods of Introduction ..............1 measurement of EMC performance, in laying down acceptable (and achievable) standards of performance and in drafting legal requirements Specification ..............2 to impose compliance with these standards on manufacturers of EC Declaration of Conformity .........3... -
Page 3: Specification
Measurement Circuit Specification Connector: 50Ω BNC, on front panel. Through Path Max. applied voltage: 7 V dc+rms. Circuits: 2 wire plus Earth. Attenuation: -0·5 dB nominal calibration factor. Power Input 3 Core 1·5mm cable: 2 metres. -5 dB at 9 kHz (to CISPR specification). ±... -
Page 4: Ec Declaration Of Conformity
Remote Control Facilities: Source selection of Line 1 (Live), Line 2 (Neutral) or none. EC Declaration of Conformity Front Panel lamp indicating active circuit. Relay Operating 12 V dc nominal; limits 9 - 14 V. Voltage: Max. ±16 V to earth. Thurlby Thandar Instruments Ltd. -
Page 5: Safety
Earthing Safety WARNING! HIGH EARTH LEAKAGE CURRENT APPARATUS This device is a Safety Class I instrument, Installation Category II, according to IEC classification and has been designed to meet the The CISPR standard which defines the circuit of the LISN requires it to requirements of EN61010-1 (Safety Requirements for Electrical contain high value decoupling capacitors from the mains supply circuits to Equipment for Measurement, Control and Laboratory Use), and has been... -
Page 6: Installation
Fusing Installation The LISN contains no internal overload protection for the unit under test. Mounting To ensure that the supply is disconnected if a fault condition occurs the supply arrangements should include a fuse or circuit breaker suitably The unit is designed for floor, bench or rack mounting. rated for the connecting cable used and the appliance being tested. -
Page 7: Emc Standards
Ventilation EMC Standards Significant heat is generated within the unit when passing currents near EMC standards are published by national standards organisations in most the maximum rating. Ensure that the ventilation slots are not obstructed. countries of the world. In Europe the various national standards previously used have been replaced by a common set of harmonised standards Remote control following the publication and adoption of the EMC Directive of the... -
Page 8: Conducted Emission Measurements
• television reception, but as EMC has become the subject of legal Provides a defined impedance to the interfering signals looking into requirements greater emphasis has been laid upon the repeatability of the supply port, independent of the impedance of the supply mains. measurements, even at the expense of making those measurements less The outline block diagram shows how these functions are provided. -
Page 9: Operation
root of the actual circuit bandwidth. For this reason, all CISPR compliant This filter precedes the limiter, so it also further improves the protection receivers (whether implemented as a receiver or a spectrum analyser) against large low frequency signals causing intermodulation in the limiter. provide selectivity before the first mixer by using a "tracking"... -
Page 10: Conducted Immunity Measurements
remote control relays in the LISN are wired to the measurement controller. Connecting to equipment See the Installation section for connection details. Place the apparatus to be tested and the LISN in the positions required by the test specification. Bond the LISN to the measurement ground plane Use on load terminals using a short, thick conductor from the binding post on the front panel. -
Page 11: Calibration
which affect this behaviour; routine calibration consists of checking the limiter batteries, and confirming that physical damage, poor connections or unexpected component drift has not affected the other characteristics. The nominal performance curves are shown on the last page of this book. Work is currently in progress in the standards committees to address the question of reproducibility of EMC measurements and equipment characteristics, and this may lead to the publication of recommended code... -
Page 12: Maintenance
Lithium Batteries are used which should give an operating life in excess of Insertion Loss ten years. If replacement is necessary, dismantle the unit and fit new The insertion loss is measured between the front panel power outlet batteries of the correct type to the front panel PCB. Take care to observe (using the adapter described above) and a 50Ω... -
Page 13: Circuit Description
Front Panel PCB Circuit Description The front panel PCB carries the 50Ω signal processing circuits. SW1 in Network PCBs conjunction with the two relays selects one of the signal sources for The incoming supply lines at the rear of the unit are connected to the two measurement while the other is terminated in a 50Ω... -
Page 14: Servicing Information
now be pulled back from the panel. Take care not to lose the spacers from Servicing Information the bushes of the panel mounting components. Safety Considerations The coaxial cables and the wire to the artificial hand socket may be The LISN must be disconnected from all power sources before it is unsoldered if required. - Page 15 LISN Network PCB Assembly (44836-0010) Position Description Part Number Position Description Part Number C1,2,5,6 Cap 4N7 250V AC Y CER 23424-0459 Resistor 330KF W75 MF 100ppm 23209-4330 Cap 4U 450VAC P/P 23684-0013 R5,6,7,8 Resistor 680RF W75 MF 100ppm 23209-1680 Cap 8U 450VAC P/P 23684-0012 R9,10 Resistor 2K00F W75 MF 100ppm...
- Page 16 LISN Front Panel PCB Assembly (44836-0020) Position Description Part Number Position Description Part Number BAT1,2 Battery 3V Lithium 1/2AA PCB mtg 22010-0600 Resistor 330RF W75 MF 100ppm 23209-1330 Cap 33NK 63V P/E p5 23620-0251 R16,17,18 Resistor 270RF W75 MF 100ppm 23209-1270 Cap 100NK 63V P/E p5 23620-0246...
- Page 17 Network Screen - LISN 31541-0010 LISN 1600 FRONT PANEL ASSY Rear Panel - LISN 33331-5520 Description Part Number Case Upper - TSX Series 33537-0640 Knob 21mm DA217 180 Grey 99 20657-0070 Case Lower - LISN 33537-0710 Knob Cap Black Line C211 Grey 99...
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Page 18: Characteristic Curves
Characteristic Curves Input Impedance vs. Frequency of 50Ω || (50µH + 5Ω) CISPR 16 Network, showing nominal value and ±20% limits Ohms 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz 100 MHz Transmission Loss vs. Frequency of LISN Coupling Network 1 kHz 10 kHz 100 kHz...