rdnSpectrumGroupSnrHysteresisValue
RDN-CABLE-SPECTRUM-GROUP-MIB ·
.1.3.6.1.4.1.4981.6.1.2.1.1.25
Object
column
r/w
Unsigned32
SNR hysteresis (a default hysteresis of 2dB) is used to
determine the SNR threshold for the downward transition from
upper modulation type to a lower modulation type. The hysteresis
can be configured to a resolution of 1dB. The operator must be
aware of the effects of lowering or increasing the hysteresis. An
increase in hysteresis will delay the channel switching. A
decrease in hysteresis could result in too many transitions. For
example, if the SNR threshold is configured to 20dB and the
default SNR hysteresis of 2dB is used, then in the event of noise,
a channel switch from primary to spare will take effect when the
SNR value drops to 18dB on the primary channel (provided the
spare channel's SNR is at least 20dB). When the primary channel's
SNR goes up to 20dB, the primary channel will be rolled back.
If a spare channel is not available or the spare channel's SNR is
below 20dB, and if a secondary modulation profile is configured,
then the modulation profile of the primary channel is changed.
This object applies to DRX and CMTS 2x8.
Allowable choies are 2dB or 3dB
Context
- MIB
- RDN-CABLE-SPECTRUM-GROUP-MIB
- OID
.1.3.6.1.4.1.4981.6.1.2.1.1.25- Type
- column
- Access
- readwrite
- Status
- current
- Parent
- rdnSpectrumGroupEntry
- Table
- rdnSpectrumGroupTable
- Siblings
- 25
Syntax
Unsigned32
Values & Constraints
Object Constraints
range: 2-3
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| rdnSpectrumGroupName The text name (index) of the spectrum group. | column | OctetString | .1.3.6.1.4.1.4981.6.1.2.1.1.1 |
| rdnSpectrumGroupRowStatus Controls and reflects the status of rows in this table. This
field is used to control the addition and deletion of a
spectrum group. | column | SNMPv2-TCRowStatus | .1.3.6.1.4.1.4981.6.1.2.1.1.10 |
| rdnSpectrumOfflineModemCount Number of offline modems for this spectrum group | column | SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4981.6.1.2.1.1.11 |
| rdnSpectrumOnlineModemCount Number of online modems for this spectrum group | column | SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4981.6.1.2.1.1.12 |
| rdnSpectrumActiveModemCount Number of active modems for this spectrum group | column | SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4981.6.1.2.1.1.13 |
| rdnSpectrumRegisteredModemCount Number of registered modems for this spectrum group | column | SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4981.6.1.2.1.1.14 |
| rdnSpectrumProvisionedModemCount Number of provisioned modems for this spectrum group | column | SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4981.6.1.2.1.1.15 |
| rdnSpectrumUnregisteredModemCount Number of Unregistered modems for this spectrum group | column | SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4981.6.1.2.1.1.16 |
| rdnSpectrumGroupUnerroreds Codewords received on this spectrum group without error.
This includes all codewords, whether or not they
were part of frames destined for this device. | column | SNMPv2-SMICounter32 | .1.3.6.1.4.1.4981.6.1.2.1.1.17 |
| rdnSpectrumGroupCorrecteds Codewords received on this spectrum group with correctable
errors. This includes all codewords, whether or not
they were part of frames destined for this device. | column | SNMPv2-SMICounter32 | .1.3.6.1.4.1.4981.6.1.2.1.1.18 |
| rdnSpectrumGroupUncorrectables Codewords received on this spectrum group with uncorrectable
errors. This includes all codewords, whether or not
they were part of frames destined for this device. | column | SNMPv2-SMICounter32 | .1.3.6.1.4.1.4981.6.1.2.1.1.19 |
| rdnSpectrumGroupId The number index for the spectrum group. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.2 |
| rdnSpectrumGroupStaticLoadBalEnable This field controls the Static Load Balancing feature.
This parameter applies to all CMTS card types. | column | Enumeration | .1.3.6.1.4.1.4981.6.1.2.1.1.20 |
| rdnSpectrumGroupLoadBalance Setting this object to TRUE performs a Static Load
Balancing for the spectrum group. Reading this object always
returns FALSE. | column | SNMPv2-TCTruthValue | .1.3.6.1.4.1.4981.6.1.2.1.1.21 |
| rdnSpectrumGroupActiveChannelSamplingPeriod The signal quality of the active channel is periodically measured for SNR.
This object is the time between two consecutive signal quality measurements
of the active channel.
… | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.22 |
| rdnSpectrumGroupHopRollbackChannelSamplingPeriod When a primary channel is swapped with the spare channel, if the rollback
is configured, the primary channel is periodically measured for
signal quality in the background using … | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.23 |
| rdnSpectrumGroupHopSpareChannelSamplingPeriod If a primary channel could not be swapped for noise avoidance with
a spare channel, due to poor signal quality of the spare channels,
the spare channels are periodically assesse… | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.24 |
| rdnSpectrumGroupReferenceCMExclusion This parameter defines the number of low SNR modem(s),
on each upstream in the spectrum-group, not allowed to be
used for channel assessment. This parameter has no effect
when t… | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.26 |
| rdnSpectrumGroupHopPeriod The rate at which the frequency hop takes place. This would be
useful in preventing excessive hops. Unit is in second.
This parameter applies only to CMTS 1x8 and 1… | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.3 |
| rdnSpectrumGroupHopThresholdFlap The CM flap rate percentage threshold that controls the hopping
frequency. The hopping only happens when the percentage of flap
CMs is higher than this threshold. Value 0 means … | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.4 |
| rdnSpectrumGroupHopThresholdError The FEC error rate percentage threshold that controls the hopping
frequency. The hopping only happens when the error rate percentage
is higher than this threshold. The unit is 1/… | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.5 |
| rdnSpectrumGroupHopRollbackEnable This field controls the spectrum rollback option when the original
channel quality recovers. The rollback is allowed when this field
is enabled. The rollback is not allowed when t… | column | Enumeration | .1.3.6.1.4.1.4981.6.1.2.1.1.6 |
| rdnSpectrumDataCollectResolution The spectrum data collection resolution, in Hz.
This parameter applies to all CMTS card types. | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.7 |
| rdnSpectrumDataCollectInterval The spectrum data collection interval, in second. Minimum value 60
seconds. Value 0 means the collection is disabled.
This parameter applies to all CMTS card types. | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.8 |
| rdnSpectrumGroupGuardBand The minimum spectrum separation between upstream channels in
the same spectrum group, in Hz.
This parameter applies to CMTS 1x8 and 1x4 cards. | column | Unsigned32 | .1.3.6.1.4.1.4981.6.1.2.1.1.9 |