docsIf31CmDsOfdmChanNumActiveSubcarriers

This attribute represents the number of active data
subcarriers within the OFDM downstream channel (i.e. this
exclude subcarriers for continuous pilots and the PLC).
For 4K FFT mode, the maximum number of subcarriers including
continuous pilots and the PLC cannot exceed 3800, and for
8K FFT mode, the maximum number of active subcarriers including
continuous pilots and the PLC cannot be greater than 7600.
              
However, there are a minimum of 56 continuous pilots in a 192MHz
channel that has no exclusions, and the size of the PLC is
8 subcarriers for 4K FFT mode and 16 subcarriers for 8K FFT mode.
Therefore the maximum value of NumActiveSubcarriers is 3736
(or 3800 - 56 - 8) for 4K FFT mode and 7528 (or 7600 - 56 - 16)
for 8K FFT mode.

MIB

DOCS-IF31-MIB

OID

.1.3.6.1.4.1.4491.2.1.28.1.9.1.6

Type

column

Access

readonly

Status

current

Parent

docsIf31CmDsOfdmChanEntry