ARRIS-CMTS-FFT-MIB
The ARRIS-CMTS-FFT-MIB enables monitoring and management of Fast Fourier Transform (FFT) signal processing metrics on Arris Cable Modem Termination Systems (CMTS), specifically tracking upstream channel noise, spectral efficiency, and modulation error ratio (MER) data derived from FFT analysis.
Imported Objects
Objects
24 total| Object Name |
|---|
cmtsFftMIBThis MIB manages the FFT software on the Arris CMTS MODULE-IDENTITY .1.3.6.1.4.1.4115.1.4.5.1 |
dcxFftObjects OBJECT IDENTIFIER .1.3.6.1.4.1.4115.1.4.5.1.1 |
dcxFftUpstreamChannelTableArris CMTS FFT upstream channel configuration table. An entry in this table exists for each ifEntry with an ifType of docsCableUpstreamInterface (129) that supports FFT collection and reporting. SEQUENCE OF DcxFftUpstreamChannelEntry .1.3.6.1.4.1.4115.1.4.5.1.1.1 |
dcxFftUpstreamChannelEntryArris FFT upstream channel entry. DcxFftUpstreamChannelEntry .1.3.6.1.4.1.4115.1.4.5.1.1.1.1 |
dcxFftSizeNumber of samples to be collected for FFT. Valid values are 256, 512, 1024, 2048, 4096. The FFT payload size will be the number of samples multiplied by the number of bytes per sample as determined by dcxFftOutputFormat. The duration of the FFT sample will be the number of samples divided by the sample rate as determined by dcxFftSampleRate.rw Unsigned32 (256|512|1024|2048|4096) .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.1 |
dcxFftSampleRateFFT sample rate based on the input source to the FFT. The input to the FFT can be the ADC output, the ADC output followed by a down-mixer and half-band filter, the ADC output followed by a down-mixer and quarter-band filter, or the received channel's Nyquist filter output.rw Enumeration .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.2 |
dcxFftCentreFrequencyFFT centre frequency. This object is used only if dcxFftSampleRate is set to halfAdcRate or quarterAdcRate to set the down-mixer frequency.rw Integer32 (-81920000..81920000) UNITS "hertz" .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.3 |
dcxFftWindowingSet the frequency-domain windowing filter.rw Enumeration .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.4 |
dcxFftLogAveragingTimeConstantTime averaging constant exponent, M. Constant is 2^M. Setting this object to zero disables averaging.rw Unsigned32 .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.5 |
dcxFftOutputFormatFFT processor output format. Format can be i. raw complex time-domain I/Q format ii. FFT data in I/Q format iii. FFT data in power format iv. FFT data in amplitude format. The sample sizes are 4 bytes (i. - iii.) and 2 bytes (iv.)rw Enumeration .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.6 |
dcxFftOperatingModeOperating mode of FFT process. Determines whether the FFT measurement takes place while no CMs are transmitting (measuring noise floor), during a CM burst, or by periodically sampling the spectrum without regard to scheduling of the upstream.rw Enumeration .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.7 |
dcxFftIdleIntervalInterval in microseconds between consecutive FFT triggers when dcxFftOperatingMode is baseSpectrum or periodicSpectrum. This object is not used if dcxFftOperatingMode is set to burstSpectrum or if dcxFftTriggerCount is 1.rw Unsigned32 .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.8 |
dcxFftBurstSidSID on which to trigger the FFT process. This object is used only if dcxFftOperatingMode is set to burstSpectrum.rw Unsigned32 .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.9 |
dcxFftBurstIUCIUC type on which to trigger the FFT process. This object is used only if dcxFftOperatingMode is set to burstSpectrum or periodicSpectrum. A value of 0 means trigger on any IUC type.rw INTEGER .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.10 |
dcxFftLogicalChannelLogical channel on which to trigger the FFT process. This object is used only if dcxFftOperatingMode is set to periodicSpectrum. A value of -1 means trigger on any logical channel.rw INTEGER (-1..3) .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.11 |
dcxFftTriggerCountNumber of times to trigger FFT when dcxFftEnable and dcxFftApplyConfig are set to true. Set this object to zero to trigger FFT continuously.rw Unsigned32 .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.12 |
dcxFftEnableSet to true to enable FFT on this channel. Set to false to disable. Setting will take effect when dcxFftApplyConfig is set to truerw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.13 |
dcxFftApplyConfigSet to true to trigger an FFT process with configuration determined by the other objects in this group. An SNMP GET of this object will always return falserw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.14 |
dcxFftInProgressThis object will return true if an FFT process is currently in progress (having been started by a SET to dcxFftApplyConfig) for this upstream channel. Returns false otherwisero TruthValue (SNMPv2-TC) .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.15 |
dcxFftCurrentTriggersNumber of FFT triggers since the last FFT process was started.ro Unsigned32 .1.3.6.1.4.1.4115.1.4.5.1.1.1.1.16 |
dcxFftPayloadTableArris CMTS FFT upstream channel payload table. SEQUENCE OF DcxFftPayloadEntry .1.3.6.1.4.1.4115.1.4.5.1.1.2 |
dcxFftPayloadEntryArris CMTS FFT upstream channel payload entry. Multiple entries in this table exist for each ifEntry with an ifType of docsCableUpstreamInterface (129) that supports the FFT collection and currently has FFT data to report. DcxFftPayloadEntry .1.3.6.1.4.1.4115.1.4.5.1.1.2.1 |
dcxFftPayloadIndexAn identifier for the 256-byte buffer available at the dcxFftPayloadData object. Unsigned32 .1.3.6.1.4.1.4115.1.4.5.1.1.2.1.1 |
dcxFftPayloadDataThe FFT payload data in the buffer identified by dcxFftPayloadIndex.ro DcxFftPayloadBuffer .1.3.6.1.4.1.4115.1.4.5.1.1.2.1.2 |
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