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Table 3 is provided to collect information regarding the existing DOCSIS services supported
by the installation site. If there are no existing DOCSIS services supported, skip Table 3 and
proceed to subsequent tables. If more than two DOCSIS services exist, additional
characterization tables can be found in "Additional Characterization Tables" on page 16.
Table 3: Existing DOCSIS Service Characterization
Table 4 on page 8 is provided to collect upstream characterization information for a DOCSIS
Module of the CMTS to be installed. If the desired CMTS configuration includes more than
one DOCSIS Module, additional tables are available in "Additional Characterization Tables" on
page 16.
Parameter
1st DOCSIS Service
Upstream RF bandwidth allocated
Upstream modulation type
Upstream input level expected at CMTS
FEC enabled?
If yes, FEC level parameters (T and K)
Upstream measured C/N
Downstream RF bandwidth allocated
Downstream modulation type
Downstream output signal level (relative to analog video)
Downstream measured C/N
Downstream interleave depth setting
2nd DOCSIS Service
Upstream RF bandwidth allocated
Upstream modulation type
Upstream input level expected at CMTS
FEC enabled?
If yes, FEC level parameters (T and K)
Upstream measured C/N
Downstream RF bandwidth allocated
Downstream modulation type
Downstream output signal level (relative to analog video)
Downstream measured C/N
Downstream interleave depth setting
Characterization of Installation Site
Value
____ MHz (max) ____ MHz (min)
____ QPSK ____ 16QAM
____ dBmV
____ yes ____ no
____T ____ K
____ dB
____ MHz (max) ____ MHz (min)
____ 64QAM ____256QAM
____ dB
____ dB (DOSCIS carrier)
____ dB (Analog video carrier)
___ (# of taps) ____(increments)
____ MHz (max) ____ MHz (min)
____ QPSK ____ 16QAM
____ dBmV
____ yes ____ no
____ T ____ K
____ dB
____ MHz (max) ____ MHz (min)
____ 64QAM ____256QAM
____ dB
____ dB (DOSCIS carrier)
____ dB (Analog video carrier)
___ (# of taps) ____(increments)
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