Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split 安装指南
Chapter 3 Balancing and Setup
To Replace the Pad on the New OIB
To achieve better transponder signaling, the new OIB board is used in the node with
a 75 ohm plug-in pad to segregate the DOCSIS transponder signal in one single
reverse path. When the transponder is removed, the new OIB board can be
configurable by replacing the 75 ohm pad with a 0 dB pad to return to dual reverse
signal paths.
Note: See the figure of the 75 ohm pad on this page to identify your OIB board
Note: See the figure of the 75 ohm pad on this page to identify your OIB board
versions. Ignore this section if the old OIB board is applied.
Complete the following steps to configure the pad if you need to set the node
Complete the following steps to configure the pad if you need to set the node
configuration to dual.
1 Open the housing. Refer to
1 Open the housing. Refer to
To Open the Node Housing (on page 15).
2 Press the fiber tray release toward the node housing, and then lift the fiber tray
roughly 90 degrees to its unstowed position.
3 Locate the 75 ohm pad on the interface board beneath the fiber tray hinge.
4 With one hand on either side of the fiber tray, carefully unplug the 75 ohm pad
4 With one hand on either side of the fiber tray, carefully unplug the 75 ohm pad
from the interface board. Avoid pinching or pulling any nearby optical fibers.
5 Align the replacement 0 dB plug-in pad completely with its corresponding hole
and install the pad.
6 Return the fiber tray to its stowed position, ensuring that the fiber tray release
locks the fiber tray in place.
7 When finished working inside the node, close the housing. Refer to
To Close the
Node Housing (on page 15).
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