Cisco Cisco 1 GHz GainMaker Amplifier インストールガイド
Chapter 3 Balancing and Setup
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reverse optical receiver RF output test point.
a Compare the received level to the reference level desired.
b If using a sweep system that is x dB below standard CW carrier levels, be
a Compare the received level to the reference level desired.
b If using a sweep system that is x dB below standard CW carrier levels, be
sure to consider that the receive level should also be x dB below the CW
reference level.
reference level.
c To adjust the receive level to make it match the desired reference level, alter
the value of the line extender reverse output pad. Each 1 dB increase in pad
value should result in a corresponding 1 dB decrease in receive level, and
each 1 dB decrease in pad value should give a 1 dB increase in receive level.
value should result in a corresponding 1 dB decrease in receive level, and
each 1 dB decrease in pad value should give a 1 dB increase in receive level.
3 Once the proper receive level and tilt of the test signals have been achieved,
properly close the line extender housing and repeat the process at the next
reverse amplifier in the downstream cascade.
reverse amplifier in the downstream cascade.
Important:
Reinstall design print value reverse input pads for any port whose input pad
may have been temporarily replaced with a 0 dB value pad for reverse path
balancing purposes.
may have been temporarily replaced with a 0 dB value pad for reverse path
balancing purposes.
Work outward from the node, and outward from each external split in the
coaxial plant, until all line extenders in the cascade have been balanced.
coaxial plant, until all line extenders in the cascade have been balanced.
Repeat the process for all of the reverse amplifier cascades off any remaining
active node ports until all reverse amplifiers feeding into the node have been
balanced.
active node ports until all reverse amplifiers feeding into the node have been
balanced.