Receiver Operation - Cisco Prisma II EDR Installation Manual

Receiver Operation

At the receive end, typically in a large hub or headend, the EDR Receiver module
receives the optical signal and performs the conversion back to the baseband data
stream. The resulting data stream is converted back to analog reverse path signals
for routing to termination equipment.
The following block diagram shows the receiver module's internal components.
At the headend, the reverse optical receiver converts the optical signal back to an RF
signal that is then routed out through the receiver's RF output.
Operating Modes
When used together with a Prisma II EDR Transmitter, the receiver can be
configured for either of two modes of operation:
Single 2:1

Dual 2:1

These operating modes are described below.
Single 2:1 Mode
Referring to the diagram below, the EDR transmitter digitizes and combines two RF
signals (RF 1 + RF 2) into one serial stream and transmits it over optical fiber to the
receiver. At the receiver, the serial stream is deserialized, converted back to its two
analog RF components, and then sent to the two RF connectors on the back of the
module. RF 1 appears on RF port A, and RF 2 appears on RF port B.
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EDR 85 System Overview
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