docsPnmCmtsUsSpecAnTable
DOCS-PNM-MIB ·
.1.3.6.1.4.1.4491.2.1.27.1.3.8
Object
table
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 well as underlying
noise/interference during a quiet period.
The CMTS provides wideband upstream spectrum analysis capability
covering the full upstream spectrum of the cable plant. The CMTS can
be made to use 100 kHz or better resolution (bin spacing) in the
wideband upstream spectrum measurement.
Depending on the particular CMTS implementation, variable
upstream spectrum analysis span is possible.
It is also possible that the CMTS will provide the collection of
time-domain input samples as an alternative to the frequency-domain
upstream spectrum results.
In pre-DOCSIS-3.1 mode, the CMTS provides the ability to trigger the
spectrum sample capture and perform spectrum analysis using the
following modes:
- Free running
- Trigger on minislot count
- Trigger on SID (service identifier)
- Trigger during quiet period (idle SID)
In DOCSIS 3.1 mode, the CMTS provides the ability to trigger spectrum
sample capture and perform spectrum analysis using the following modes:
- Free running
- A specified timestamp value
- Minislot Number
- A specified MAC address defining a SID, triggering at the beginning
of the first minislot granted to that SID
- The idle SID, triggering at the beginning of the first minislot
granted to that SID
- A specified active or quiet probe symbol, triggering at the beginning
of the probe symbol
Context
- MIB
- DOCS-PNM-MIB
- OID
.1.3.6.1.4.1.4491.2.1.27.1.3.8- 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 |
| 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 |
Child Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| docsPnmCmtsUsSpecAnEntry The conceptual row of the docsPnmCmtsUsSpecAnTable. An instance
is dynamically created and exists for an associated ifIndex upon
which the test defined by this table can take plac… | row | - | .1.3.6.1.4.1.4491.2.1.27.1.3.8.1 |