docsPnmCmtsUsImpNoiseTable
DOCS-PNM-MIB ·
.1.3.6.1.4.1.4491.2.1.27.1.3.4
Object
table
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, energy exceeding the threshold
triggers the measurement of an event, and energy falling below the
threshold ends the event. An optional feature allows the threshold to
be set to zero, in which case the average power in the band will be
measured. The measurement is time-stamped using the D3.0 field of the
64-bit extended timestamp (bits 9-40, where bit 0 is the LSB), which
provides a resolution of 98 ns and a range of 7 minutes.
The CMTS provides the capability to capture the following statistics
in a selected band up to 5.12 MHz wide: Timestamp of event, Duration of
event, Average power of event.
The CMTS provides a time history buffer of up to 1024 events. In steady
state operation, a ring buffer provides the measurements of the last 1024
events that occurred while the measurement was enabled.
Context
- MIB
- DOCS-PNM-MIB
- OID
.1.3.6.1.4.1.4491.2.1.27.1.3.4- 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 |
| 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 |
| 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 |
|---|---|---|---|
| docsPnmCmtsUsImpNoiseEntry The conceptual row of the docsPnmCmtsUsImpNoiseTable. An instance
is dynamically created and exists for an associated ifIndex of the
physical upstream channel upon which the test … | row | - | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1 |