Cisco GS7000 Installation And Operation Manual page 195

Enhanced Digital Return System Overview
Single 2:1 on Primary + Single 1:1 on Secondary
This mode is a combination of the 2:1 and 1:1 modes described above. Referring to
the diagram below, one 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. The
other EDR transmitter digitizes a single RF signal (RF 1). At the receiver, the serial
streams from two separate transmitters are deserialized and converted back to their
two analog RF components. The combined Transmitter 1 signal (RF 1 + RF 2) is sent
to RF port A, and the Transmitter 2 signal (RF 1) is sent to RF port B on the back of
the module.
Single 1:1 on Primary + Single 2:1 on Secondary
This mode is identical to the mode just described, except that the 2:1 transmitter is
connected to the second receiver and the 1:1 transmitter is connected to the primary
receiver.
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