3641-type mounted transmitter main assembly using screws rapid, secure

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3641-type mounted transmitter main assembly using screws rapid, secure

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Introduction 3641-Type Transmitter Subassembly
3641-type mounted transmitter main assembly using screws rapid, secure contact with main assembly's heat sink. heat sink should designed with large fins able dissipate heat generated 3641. This platform ensures speedy integration optimal heat transfer from engine main assembly. addition user-friendly mechanical form factor, 3641 designed with second-stage hybrid amplifier on-board. engine linearized correct distortion contributed both hybrid amplifier laser diode. This highly valuable because minimizes potentially large negative impact unmatched hybrid amplifier being added transmitter board assembly during integration. ports available with other connector specified customer. interface Samtec male TSW-114-08-L-DRA equivalent connector. electronic fine-tuning option 3641 provides excellent opportunity optimize overall performance fully integrated transmitter factory well field. This circuitry minimize variations link set-up degradation caused chromatic dispersions. Before using this feature, however, important understand recommended tuning procedure. detailed information, please refer Electronic Fine Tuning 3641-Type Transmitter Subassembly application note.
Samtec trademark Samtec, Inc.
Characterized electronic fine-tuning capability, 3641-type Transmitter Subassembly provides significant advantages OEMs, system integrators, users enabling optimization transmitter performance various cable television environments.
Introduction
Lucent's 3641-type (A/B/C/D) CATV transmitter engine offering unique features superior performance. compact, printed-circuit board 4.25 in.) fits easily into new, high-density transmitter designs. offers second-stage amplification unique electronic fine-tune capability optimization both field. When integrated with CATV transmitter main assembly, resulting product exhibits world-class performance reliability.
Requirements
This board requires max) (350 max) addition laser-driver thermoelectric cooler signals. independent voltage-control lines varying from max) required take advantage electronic fine-tuning option.
Introduction 3641-Type Transmitter Subassembly
Integration
3641 designed engine CATV fiber-optic transmitter. Figure shows block diagram typical fiber-optic transmitter utilizing Lucent's 3641.
When integrated with main transmitter assembly, 3641 requires necessary driver signals supplied through 28-pin connector. input port accepts input signals dBmV/ch 110-channel NTSC frequency plan. input level varies different channel loading frequency plans.
Gain Control
Stage
Stage
ORTEL Predistorter
Supply Optical Power Control Circuits Laser Diode Cooler Driver Circuit
3641-TYPE TRANSMITTER SUBASSEMBLY
Optical Fiber Output
Model 3641
Figure Block Diagram Typical Fiber-Optic Transmitter using Lucent's 3641-Type Transmitter Subssembly
Lucent Technologies Inc.
Introduction 3641-Type Transmitter Subassembly
controlled externally constant optical power output constant temperature. deviation from factory setpoints these parameters result variance optical power degraded distortion performance. A1611A/B laser module requires negative bias current operation. current adjustable maximum with voltage compliance -5.0 noise must exceed peak peak with ripples below MHz. order transmitter perform correctly, important that bias current laser matches bias current recorded accompanying test data sheet. This current must also controlled keep optical power constant level.
Distortion Performance
achieve satisfactory carrier-to-noise ratio (CNR), level manually adjusted selecting appropriate plug-in pad. input signal applied level other than dBmV/ch, plug-in have replaced accordingly avoid degradation distortion performance. test port output factory-set provide constant dBmV/ch signal models. Figure shows block diagram model 3641 with input output levels.
External Control
3641 designed around Lucent's A1611A/B family laser modules. A1611A/B laser module must
V/ch NTSC CATV Input Port Input Stage Plug-in Atten. Stage
Coupler
V/ch Testport Output Plug-in Atten. Predistorter
Optical Fiber Output
ORTEL A1611A/B Model 1611 LASER Laser
Figure 3641-Type Transmitter Subassembly Block Diagram
Lucent Technologies Inc.
Introduction 3641-Type Transmitter Subassembly
Related Information
Description Document Number AP00-063OPTO AP00-067OPTO AP00-069OPTO AP00-070OPTO
Transitioning from A2300 A1611A/B Laser Module application note Laser Control Circuits A1611A/B Laser Module 3641-Type Laser Transmitter Subassembly application note Mechanical Installation Requirements 3641-Type Transmitter Subassembly application note Electronic Fine Tuning 3641-Type Transmitter Subassembly application note
additional information, contact your Microelectronics Group Account Manager following: INTERNET: http://www.lucent.com/micro, Optoelectronics information, E-MAIL: docmaster@micro.lucent.com AMERICA: Microelectronics Group, Lucent Technologies Inc., Union Boulevard, Room 30L-15P-BA, Allentown, 18109-3286 1-800-372-2447, 610-712-4106 CANADA: 1-800-553-2448, 610-712-4106) ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., Science Park Drive, #03-18 Cintech III, Singapore 118256 Tel. (65) 8833, (65) 7495 CHINA: Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Fong Universe Building, 1800 Zhong Shan Road, Shanghai 200233 China Tel. (86) 6440 0468, ext. 325, (86) 6440 0652 JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan Tel. (81) 5421 1600, (81) 5421 1700 EUROPE: Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 7000 368, (44) 1189 Technical Inquiries: OPTOELECTRONICS MARKETING: (44) 1344 (Ascot
Lucent Technologies Inc. reserves right make changes product(s) information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information. 1-1161(F) Copyright 2000 Lucent Technologies Inc. Rights Reserved
October 2000 AP00-071OPTO

3641-type mounted transmitter main assembly using screws rapid, secure

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