Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Enhanced Digital Return System Overview
EDR Transmitter Module
At the transmit (node) end of the system, reverse-path RF input signals from each
node port are routed to an EDR 2:1 or EDR 1:1 Transmitter module in the housing lid.
The transmitter module converts each signal to a baseband digital data stream and
combines the signals into a serial data stream using time-division multiplexing
(TDM). The baseband data stream is then converted to an optical signal for
transmission to the headend or hub. The double-wide (2:1) transmitter modules
occupy two transmitter slots and the 1:1 modules occupy one slot.
Two RF inputs produce two discrete 5 to 85 MHz RF signals. The EDR 1:1
Two RF inputs produce two discrete 5 to 85 MHz RF signals. The EDR 1:1
transmitter module converts each signal to EDR data stream. The EDR 2:1
transmitter module applies the time division technology to multiplex the two
streams into a single data stream.
The data stream is carried optically over fiber, via an SFP type OPM module, to a
The data stream is carried optically over fiber, via an SFP type OPM module, to a
remote hub or headend location where the optical signal is detected and converted
back to a serial electrical signal. The data is then de-scrambled and de-framed and
switched to a Digital-to-Analog Converter (DAC), where the analog spectrum that
was sampled at the transmit side is reconstructed.
The EDR data stream is converted to an optical signal for transmission back to the
The EDR data stream is converted to an optical signal for transmission back to the
headend or hub.
For EDR 1:1 Transmitter Module
For EDR 1:1 Transmitter Module
For EDR 2:1 Transmitter Module
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