Externally Modulated Laser Transmitter, Standard (EMLT-1550-SR)

Data Sheet

The Optilab EMLT-1550-SR transmitters are a cost-effective and versatile transmission solution for HFC/ RFoG/PON networks regardless of architecture.

Product Overview

The Optilab EMLT-1550-SR transmitters are a cost-effective and versatile transmission solution for HFC/ RFoG/PON networks regardless of architecture.The EMLT-1550-SR laser transmitters include a high quality Distributed Feedback laser (DFB), adjustable ±1.5 nm. The EMLT-1550-SR incorporates a broadband external modulator and a pre-distortion circuit which allows up to 90 km transmission range, while maintaining a high OMI level and excellent CSO and CTB performance. The SBS supression setting allows the launch power to be adjusted from +13.5 dBm to +16.5 dBm, and is available with output power levels from +6 dBm to +8 dBm. The EMLT-1550-SR transmitter supports up to 77 NTSC analog channels, and because it’s designed to be digitally ready, it can also be loaded with additional QAM modulated data or HDTV channels making it the best cost/performance ratio in the industry. Contact Optilab for more information.

Applications

  • HFC
  • PON
  • RFoG
  • For RUS/USDA projects

Features

  • High power DFB with narrow linewidth
  • Up to 90 km transmission range
  • Adjustable SBS suppression up to +16.5 dBm
  • 77 channel NTSC plus QAM digital
  • Automatic Gain and Manual Gain Control
  • 45 to 870 MHz bandwidth standard
  • 3 year warranty standard

Feature Name Description
General Specifications
Laser Wavelength Range 1550 nm ± 15 nm, Specific Wavelength on ITU Grid optional
Transmission Range Up to 90 km
Output Power Level +6 to +8 dBm
Noise Bandwidth 4 MHz
Carrier to Noise Ration (CNR) 52 dB typ. @ 0 dBm
Composite Second Order (CSO) Distortion -63 dBc max.
Composite Triple Beat (CTB) Distortion -63 dBc max.
Front Panel RF Gain / OMI Adjustment Range +6 dB / -6 dB
SBS Suppression Level Adjustable +13.5 dBm, +16.5 dBm
Input RF Power Level 8 to 20 dBmV per channel
AGC Adjustment Range 6 db (optional)
Frequency Plan 77 NTSC analog channels + Digital QAM
Frequency Range 45 MHz to 870 MHz, 1 GHz available
Flatness in Frequency Range ±0.75 dB
RF Impedance 75 Ω
RF Return Loss 16 dB min.
Mechanical Specifications
Operation Temperature Range 0°C to +50°C
Storage Temperature Range -40°C to +70°C
Power Supply 80 – 240 V, 43 – 63 Hz AC
Power Consumption 75 W max.
Housing Dimensions 1RU 19”(W) x 14”(D) x 1.75”(H)
Control / Monitoring DFB Laser Temperature and Current
Display Output Power Level, TEC temperature
Alarm Over Temperature , Over Current
Optical Connectors SC/APC or Customer Specified