3970

Data Sheet October 2001 3970-Type 1550 nm Transmitter Description The 3970-type, externally modulated 1550 nm transmitter provides CATV systems integrators one of the fastest and easiest paths to customer value-added, high-performance solutions. The 1550 nm transmitter engine incorporates a source laser optimized to improve transmitter and link performance with high specifications and better signal quality. This advantage drives superior control of RIN through fiber and management of dispersion, stimulated brillouin scattering, and self-phase modulation for better noise and distortion performance over long-distance applications. Features s Extremely fast time to market and very low engineering investment Superior CNR, CSO, and CTB performance on two high-power optical outputs Mobile field-tuning application provides real-time performance optimization High SBS suppression capabilities enhance architectural options and coverage Multiple programmable tuning optimizations per transmitter facilitate inventory management and performance across architectures The transmitter embedded system software also provides the ability to load and store multiple configurations of the transmitter tuning parameters. In this way, a single transmitter can be optimized for more than one set of link characteristics. This feature simplifies inventory and reduces multiple device management. The software controls, monitors, generates/processes alarms, and handles faults for transmitter subsystems. The system software also accommodates three interfaces for two-way communication with the transmitter. A two-line front panel user interface provides system status and telemetry, and accepts user commands. Fine tuning can be accomplished in the field through an RS-232 serial interface. System software upgrades can be downloaded on-the-fly into the transmitter via this interface. A well-defined API at the RS-485 network interface will enable custom applications and network management systems to communicate with and control the transmitter. s s s s Applications s s s High-performance supertrunking links High-launch power distribution networks Redundant analog ring architectures 3970-Type 1550 nm Transmitter Data Sheet October 2001 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Operating Temperature Range Storage Case Temperature Range Symbol TOP Tstg Min 0 –20 Max 50 65 Unit °C °C Characteristics Table 1. Optical/Electrical Characteristics Parameter 3970A Channel Plan Optical Output (min) Wavelength Range Flatness (max) 42 MHz—750 MHz 42 MHz—870 MHz RF Return Loss (min), 42 MHz—870 MHz RF Input Level, CW1 Carrier-to-Noise Ratio (min), 65 km2, 3 Composite Second Order (min)2, 3, Composite Triple Beat (min)2, 3, Cross Modulation (min)2, 3, 4, Number of Outputs5 79 NTSC 7 Each 1540— 1560 1.0 1.5 16 17—27 52 –65 –65 –65 2 3970B 40 NTSC Low 7 Each 1540— 1560 1.0 1.5 16 20—30 55 –70 –67 –65 2 Device Code 3970C 39 NTSC High 7 Each 1540— 1560 1.0 1.5 16 20—30 55 –70 –67 –65 2 3970D 112 NTSC 7 Each 1540— 1560 1.0 1.5 16 15.5—25.5 49 –60 –62 –60 2 3970E 60 PAL-D 7 Each 1540— 1560 1.0 1.5 16 18—28 52 –65 –65 –65 2 3970F 42 Cenelec 7 Each 1540— 1560 1.0 1.5 16 22—32 52 –65 –65 –65 2 — dBm nm Unit dBp-p dBp-p dB dBmV/ channel dB dBc dBc dBc — 1. Input range over which specifications are met. 2. Received power is 0 dBm. Receiver responsivity is assumed to be 1.0 mA/mW, and receiver equivalent noise current is 8 pA/(Hz)1/2. 3. For link consisting of transmitter, EDFA, 65 km of SMF-28 fiber, and receiver. EDFA noise figure is 5 dB minimum. Launch power from EDFA is 16 dBm minimum. Noise bandwidth is 4 MHz for NTSC, 5 MHz for PAL and Cenelec. 4. Measured per NCTA recommended practice, except when measured with appropriate adjustments to the transmitter to prevent AGC-induced gain change, which corrupts XMOD measurement. 5. All specifications apply to both outputs. 2 Agere Systems Inc. Data Sheet October 2001 3970-Type 1550 nm Transmitter Electrical/Optical Characteristics (continued) Table 2. Power Requirements Parameter ac Input Range dc Input Range, Floating Power Table 3. Package Characteristics Parameter Height Width Depth Weight Dimension 1.72 (44), 1U 19 (483) 13.16 (334) with fans 9.0 (4) unit in. (mm) in. (mm) in. (mm) lbs. (kg) Min 94 50 36 — Max 245 60 60 50 Unit Vac Hz Vdc W Outline Diagram KEYSWITCH CONFORMS TO IEC SAFETY STANDARDS; PROTECTS USERS FROM INADVERTENT EXPOSURE. DISPLAY HEIRARCHICAL MENU STRUCTURE ACCESSIBLE VIA FRONT PANEL PUSHBUTTONS. ENABLES MONITORING AND CONTROL OF SELECTED PARAMETERS. SELECT CHOOSE ITEMS FROM MENU STRUCTURE TO VIEW/CHANGE. LASER OFF STATUS ON 1550 TRANSMITTER SELECT RF TEST LASER LED INDICATES STATUS OF SOURCE LASER. STATUS LED ENABLES MONITORING OF ALL ALARMS AND WARNINGS; GREEN, AMBER, RED UP/DOWN PUSHBUTTONS ENABLES NAVIGATION THROUGH MENU AND PARAMETER INCREMENT/ DECREMENT. RF TEST PORT REPLICA OF INPUT RF SIGNAL. 1-1178F MODEL/SN IDENTIFYING LABEL Opt A Opt B RFIN FACTORY RS-485 ALARM AUX2 AUX1 MIN MAJ 36 Vdc-60 Vdc 94 Vac-245 Vac IN 0 +GND– NC CNO NC CNO NC CNO NC CNO 1 T 250 V 2A LCD 1-1178F.a Agere Systems Inc. 3 3970-Type 1550 nm Transmitter Data Sheet October 2001 Laser Safety Information Class IIIb Laser Product FDA/CDRH Class IIIb laser product. All versions are Class IIIb laser products per CDRH, 21 CFR 1040 Laser Safety requirements. All versions are Class 3B laser products per IEC ® 60825-1:1993. The device has been classified with the FDA under an accession number to be determined. This product complies with 21 CFR 1040.10 and 1040.11. Single-mode fiber pigtail and connector options (see Ordering Information, Table 4.) Wavelength = 1500 nm Maximum power = 30 mW Caution: Use of controls, adjustments, and procedures other than those specified herein may result in hazardous laser radiation exposure. DANG ER INVISIBLE LASER RADIATION AVO ID DIRECT EXPOSURE TO BEAM Wavelength: 1.5 µm Max. Output: 30 m W, Class IIIb Laser Product DANGER INVISIBLE LASER RADIATION IS EMITTED FROM THE END OF FIBER OR CONNECTOR Avoid direct exposure to beam Do not view beam directly with optical instruments INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR Avoid exposure to beam Class 3B Laser Product IEC-60825 1993 Max. Output: 30 mW Wavelength: 1.5 µm 4 Agere Systems Inc. Data Sheet October 2001 3970-Type 1550 nm Transmitter Ordering Information Table 4. Ordering Information Device Code 3970-Type Description 1550 nm Transmitter Connector Options FC/APC bulkhead, tight key; SC/APC bulkhead; E-2000/APC bulkhead Comcode TBD * For additional ordering information, please contact an account manager at OPTO West, Agere Systems Inc., 1-800-362-3891 (for sales staff, please press option 2). Agere Systems Inc. 5 3970-Type 1550 nm Transmitter Data Sheet October 2001 IEC is a registered trademark of The International Electrotechnical Commission. For additional information, contact your Agere Systems Account Manager or the following: http://www.agere.com INTERNET: docmaster@agere.com E-MAIL: N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon Tel. (852) 3129-2000, FAX (852) 3129-2020 CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen) JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei) Tel. (44) 7000 624624, FAX (44) 1344 488 045 EUROPE: Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. Copyright © 2001 Agere Systems Inc. All Rights Reserved October 2001 DS00-280OPTO-1 (Replaces DS00-280OPTO)