All MIBs › DOCS-PNM-MIB › docsPnmCmOfdmChEstCoefAmpRipplePkToPk
docsPnmCmOfdmChEstCoefAmpRipplePkToPk
Module: DOCS-PNM-MIB
OID (symbolic): DOCS-PNM-MIB::docsPnmCmOfdmChEstCoefAmpRipplePkToPk
OID (numeric): 1.3.6.1.4.1.4491.2.1.27.1.2.3.1.2
Node type: OBJECT-TYPE
Type: ThousandthdB
Access: read-only
Description: This attribute represents the value of the peak to peak ripple in the magnitude of the equalizer coefficients [PHYv3.1]. The slope component calculated for the AmplitudeSlope is subtracted from the frequency domain data and the peak to peak Ripple is calculated from the resultant data. This attribute represents the ripple across the entire OFDM channel.
Note: An algorithm for calculating the ripple and slope for these measurements is provided in section 6.5 and D.3 of the the DOCSIS 3.1 CM OSSI Specification.
What is docsPnmCmOfdmChEstCoefAmpRipplePkToPk?
The peak-to-peak ripple, in thousandths of a dB, in the magnitude of the downstream equalizer coefficients across the whole OFDM channel, after subtracting the linear amplitude slope. A high value flags micro-reflections or in-channel response irregularities that can degrade MER on affected subcarriers.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.27.1.2.3.1.2 snmpwalk -v2c -c public <target> DOCS-PNM-MIB::docsPnmCmOfdmChEstCoefAmpRipplePkToPk
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.27.1.2.3.1.2.1 snmpget -v2c -c public <target> DOCS-PNM-MIB::docsPnmCmOfdmChEstCoefAmpRipplePkToPk.1
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OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.4491 | cableLabs | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2 | clabProject | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2.1 | clabProjDocsis | CLAB-DEF-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.4491.2.1.27 | docsPnmMIB | DOCS-PNM-MIB |
| 1.3.6.1.4.1.4491.2.1.27.1 | docsPnmMibObjects | DOCS-PNM-MIB |
| 1.3.6.1.4.1.4491.2.1.27.1.2 | docsPnmCmObjects | DOCS-PNM-MIB |
| 1.3.6.1.4.1.4491.2.1.27.1.2.3 | docsPnmCmOfdmChanEstCoefTable | DOCS-PNM-MIB |
| 1.3.6.1.4.1.4491.2.1.27.1.2.3.1 | docsPnmCmOfdmChanEstCoefEntry | DOCS-PNM-MIB |
| 1.3.6.1.4.1.4491.2.1.27.1.2.3.1.2 | docsPnmCmOfdmChEstCoefAmpRipplePkToPk | DOCS-PNM-MIB |