A full series of analog 1310 nm optical transmitters are available for
the SG2000 platform. This product series, packaged to include
connectors plus return path amplifiers, offer several advanced fea-
tures. The SG2-IFPT/* transmitter uses an isolated Fabry-Perot laser
operating at 400 uW. The SG2-EIFPT/* transmitter uses an isolated
Fabry-Perot laser operating at 1 mW. The SG2-DFBT/* and DFBT3/*
use state-of-the-art uncooled, isolated, distributed feedback (DFB)
lasers operating at 1 mW and 2.0 mW respectively for improved link
performance. A new 1550 nm DFBT6/SC 4.0 mW uncooled, isolated
distributed feedback (DFB) laser is also available.
All transmitters carry a full 35 MHz of digital data or up to two video
channels. The transmitters include thermal compensation circuitry to
reduce the changes in received optical and RF signal levels as the
node temperature varies. The transmitters are enabled and disabled
in response to a signal from the status monitoring transponder for
economical power consumption and enhanced reliability.
Motorola's high speed digital return transmitter, the SG2-DRT-3X is
an excellent solution for node segmentation and wavelength
aggregation issues. The SG2-DRT-3X Time Domain Multiplexing
(TDM) system allows optimum use of the available bandwidth per
subscriber by efficiently handling unbalanced distribution between
ports.
Redundant Powering Capability
Equipped with optional dual power supplies, the SG2000 offers com-
plete system redundancy. The dual module DC power supplies are
located in the lid. Each DC power supply can deliver the total power
required by a fully configured node: 4.3 Amperes at +24 Volts and
0.69 Amperes at +5 volts.
The multiple receiver functionality of the platform accommodates split band and/or redundancy applications.
This diagram illustrates the signal flow path through the SG2000
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