EDR 85 System Overview
OL-32414-01
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EDR 85 System Overview
The Cisco EDR 85 System supports digital transmission of reverse path signals over
a fiber optic link from the node to the hub or headend. The system includes a
selection of transmitter modules, of which the Prisma II EDR Transmitter is one
example, and a companion Cisco Prisma EDR PRX85 Receiver module.
In its included Integrated Transmitter Host Module, the Prisma II EDR Transmitter
has a double-wide high density (HD) form factor and can mount directly into two
adjacent application slots in a Prisma II XD chassis. The EDR 85 System receiver
module has a single-wide HD form factor and can mount directly into a single
application slot in a Prisma II XD chassis. An accessory Prisma II Host Module is
available to adapt a pair of transmitter or receiver modules for mounting in a
standard (full-height) Prisma II chassis.
Both transmitter and receiver modules use Small Form Factor Pluggable (SFP)
optical pluggable modules (OPMs) for enhanced flexibility. The EDR 85 System
operates over the 5-85 MHz range and supports all standard reverse frequency
bandwidths at 40, 42, 55, 65, and 85 MHz.
Note:
Although the receiver module supports both 1:1 and 2:1 multiplexing
configurations, the Prisma II EDR Transmitter supports 2:1 multiplexing only.
Accordingly, the instructions in this document are confined to 2:1 multiplexing
configurations.
Features
The EDR 85 2:1 Multiplexing System has the following features:
High-performance Digital Return technology
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12-bit encoding enables transmission of analog video in the reverse band
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High-order digital modulation signals (for example, 16 QAM, 64 QAM, and
256 QAM)
Multiple operating modes in the EDR receiver support EDR transmitter and
legacy integrated bdr node transmitter
Optical pluggable modules (OPMs) enable flexible inventory management
Long-reach transmission capabilities eliminate the need for optical amplifiers,
reducing cost and space requirements
Capable of sending 2:1 multiplexed 5-85 MHz reverse signals over a single fiber
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Compatible with Cisco's 40 wavelength Dense Wave Division Multiplexing
(DWDM) system
