Cisco GS7000 Installation And Operation Manual page 33

Installing the Transponder

If you are running RCVR 1 and RCVR 2 as a redundant pair, attach the RF1
cable to the Optical Receiver 1 "-20 dB test point" AND attach the RF2 cable to
the Optical Receiver 2 "-20 dB test point." Route the cables appropriately as
shown in the following illustration.
4037424 Rev A 17