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Characterization of Installation Site
7
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
Value
1st DOCSIS Service
Upstream RF bandwidth allocated
____ MHz (max) ____ MHz (min)
Upstream modulation type
____ QPSK ____ 16QAM
Upstream input level expected at CMTS
____ dBmV
FEC enabled?
If yes, FEC level parameters (T and K)
____ yes ____ no
____T ____ K
Upstream measured C/N
____ dB
Downstream RF bandwidth allocated
____ MHz (max) ____ MHz (min)
Downstream modulation type
____ 64QAM ____256QAM
Downstream output signal level (relative to analog video)
____ dB
Downstream measured C/N
____ dB (DOSCIS carrier)
____ dB (Analog video carrier)
Downstream interleave depth setting
___ (# of taps) ____(increments)
2nd DOCSIS Service
Upstream RF bandwidth allocated
____ MHz (max) ____ MHz (min)
Upstream modulation type
____ QPSK ____ 16QAM
Upstream input level expected at CMTS
____ dBmV
FEC enabled?
If yes, FEC level parameters (T and K)
____ yes ____ no
____ T ____ K
Upstream measured C/N
____ dB
Downstream RF bandwidth allocated
____ MHz (max) ____ MHz (min)
Downstream modulation type
____ 64QAM ____256QAM
Downstream output signal level (relative to analog video)
____ dB
Downstream measured C/N
____ dB (DOSCIS carrier)
____ dB (Analog video carrier)
Downstream interleave depth setting
___ (# of taps) ____(increments)
Summary of Contents for G10 CMTS
Page 4: ... Juniper Networks G10 CMTS Pre Installation Guide iv ...
Page 6: ...List of Figures Juniper Networks G10 CMTS Pre Installation Guide vi ...
Page 8: ...List of Tables Juniper Networks G10 CMTS Pre Installation Guide viii ...
Page 12: ...G10 CMTS Document Set Juniper Networks G10 CMTS Pre Installation Guide xii ...
Page 27: ... Noise Measurement Methodology 15 Figure 2 Peak Upstream Noise Measurement Example ...
Page 32: ...Additional Characterization Tables Juniper Networks G10 CMTS Pre Installation Guide 20 ...