docsPnmCmtsUsOfdmaRxPwrTable
DOCS-PNM-MIB ·
.1.3.6.1.4.1.4491.2.1.27.1.3.6
Object
table
The purpose of the upstream channel power metric is to provide an
estimate of the total received power in a specified OFDMA channel at
the F connector input of the CMTS line card for a given user. The
measurement is based on upstream probes, which are typically the same
probes used for pre-equalization adjustment.
The CMTS measures the total power of the probe subcarriers received
from the CM.
For channels without boosted pilots, the CCAP calculates the average
power per subcarrier (Paverage) and then calculates the power normalized
to 1.6 MHz as a)Paverage + 10 * log10(32) for 50 kHz subcarrier spacing,
or as b)Paverage + 10 *log10(64) for 25 kHz subcarrier spacing.
For channels with boosted pilots, the CCAP calculates the average power
per subcarrier (Paverage) and then calculates the power normalized to
1.6 MHz as a)Paverage + 10 * log10(32) + 1 dB for 50 kHz subcarrier
spacing, or as b)Paverage + 10 *log10(64) + 0.5 dB for 25 kHz subcarrier
spacing.
NOTE: The CMTS would also use that adjusted value for comparison with the
Target Receive Power for the purposes of transmit power adjustments in the
RNG-RSP.
Context
- MIB
- DOCS-PNM-MIB
- OID
.1.3.6.1.4.1.4491.2.1.27.1.3.6- Type
- table
- Status
- current
- Parent
- docsPnmCmtsObjects
- Siblings
- 7
- Children
- 1
Syntax
No syntax metadata recorded.
Values & Constraints
No enumerated values or constraints recorded.
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| docsPnmCmtsDsOfdmSymCapTable The purpose of downstream symbol capture is to provide partial
functionality of a network analyzer to analyze the response of the
cable plant.
At the CMTS, the transmit… | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.1 |
| docsPnmCmtsDsOfdmNoisePwrRatioTable The purpose of downstream NPR measurement is to view the noise,
interference and intermodulation products underlying a portion of the
OFDM signal. As an out-of-service test, the C… | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.2 |
| docsPnmCmtsUsOfdmaAQProbeTable The purpose of upstream capture is to measure plant response and view
the underlying noise floor, by capturing at least one OFDMA symbol
during a scheduled active or quiet probe. … | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.3 |
| docsPnmCmtsUsImpNoiseTable This table provides statistics of burst/impulse noise occurring in a
selected narrow band. A bandpass filter is positioned in an unoccupied
upstream band. A threshold is set, ener… | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.4 |
| docsPnmCmtsUsHistTable The purpose of the upstream histogram is to provide a measurement of
nonlinear effects in the channel such as amplifier compression and
laser clipping. For example, laser clipping… | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.5 |
| docsPnmCmtsUsOfdmaRxMerTable This item provides measurements of the upstream receive modulation
error ratio (RxMER) for each subcarrier. The CMTS measures the RxMER
using an upstream probe, which is not subje… | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.7 |
| docsPnmCmtsUsSpecAnTable The upstream triggered spectrum analysis measurement provides a
wideband spectrum analyzer function in the CMTS which can be triggered
to examine desired upstream transmissions as… | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.8 |
Child Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| docsPnmCmtsUsOfdmaRxPwrEntry The conceptual row of the docsPnmCmtsUsOfdmaRxPwrTable. An instance
is dynamically created and exists for an associated ifIndex upon
which the test defined by this table can take … | row | - | .1.3.6.1.4.1.4491.2.1.27.1.3.6.1 |