docsPnmCmtsUsOfdmaRxMerTable
DOCS-PNM-MIB ·
.1.3.6.1.4.1.4491.2.1.27.1.3.7
Object
table
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 subject to symbol errors as data subcarriers would be. The probes used for RxMER measurement are typically distinct from the probes used for pre-equalization adjustment. For the purposes of this measurement, RxMER is defined as the ratio of the average power of the ideal QAM constellation to the average error-vector power. The error vector is the difference between the equalized received probe value and the known correct probe value. If some subcarriers (such as exclusion bands) cannot be measured by the CMTS, the CMTS indicates that condition in the measurement data for those subcarriers.
Context
- MIB
- DOCS-PNM-MIB
- OID
.1.3.6.1.4.1.4491.2.1.27.1.3.7- 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 |
| docsPnmCmtsUsOfdmaRxPwrTable 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 … | table | - | .1.3.6.1.4.1.4491.2.1.27.1.3.6 |
| 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 |
|---|---|---|---|
| docsPnmCmtsUsOfdmaRxMerEntry The conceptual row of the docsPnmCmtsUsOfdmaRxMerTable. An instance
is dynamically created and exists for an associated ifIndex upon
which the test defined by this table can take … | row | - | .1.3.6.1.4.1.4491.2.1.27.1.3.7.1 |