All MIBs › DOCS-RPHY-MIB › docsRphyRpdDevUsSignalQualityRxMer
docsRphyRpdDevUsSignalQualityRxMer
Module: DOCS-RPHY-MIB
OID (symbolic): DOCS-RPHY-MIB::docsRphyRpdDevUsSignalQualityRxMer
OID (numeric): 1.3.6.1.4.1.4491.2.1.30.1.1.15.1.3
Node type: OBJECT-TYPE
Type: Integer32
Access: read-only
Description: This attribute reports an in-channel received average Modulation Error Ratio (MER). An RxMER sample is defined as an estimate, provided by the demodulator, of the ratio: (average constellation energy with equally likely symbols) / (average squared magnitude of error vector) RxMER is measured just prior to FEC (trellis/Reed-Solomon) decoding. RxMER includes the effects of the HFC channel as well as implementation effects of the modulator and demodulator. Error vector estimation may vary among demodulator implementations. The CCAP Core RxMER is averaged over a given number of bursts at the burst receiver, which may correspond to transmissions from multiple users. In the case of S-CDMA mode, RxMER is measured on the de-spread signal. For OFDMA channels, this attribute always reports 0.
What is docsRphyRpdDevUsSignalQualityRxMer?
Reports the average received Modulation Error Ratio, in tenths of a dB, measured just before FEC decoding on this upstream SC-QAM channel, reflecting both HFC plant impairments and modulator/demodulator implementation effects; it always reads 0 for OFDMA channels. Operators watch for a declining RxMER on a channel as an early indicator of upstream plant degradation, such as ingress noise, well before it causes uncorrectable errors.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.30.1.1.15.1.3 snmpwalk -v2c -c public <target> DOCS-RPHY-MIB::docsRphyRpdDevUsSignalQualityRxMer
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.30.1.1.15.1.3.1 snmpget -v2c -c public <target> DOCS-RPHY-MIB::docsRphyRpdDevUsSignalQualityRxMer.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> docsRphyRpdDevUsSignalQualityRxMer.1
Start monitoring DOCSIS Remote PHY Device (RPD), cable HFC access node (vendor-neutral CableLabs standard) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the DOCS-RPHY-MIB::docsRphyRpdDevUsSignalQualityRxMer OID value, configure state conditions and alerts, and monitor any DOCSIS Remote PHY Device (RPD), cable HFC access node (vendor-neutral CableLabs standard) from a single console.
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 |
|---|---|---|
| 1.3.6.1.4.1.4491.2.1.30 | docsRphyMib | DOCS-RPHY-MIB |
| 1.3.6.1.4.1.4491.2.1.30.1 | docsRphyObjects | DOCS-RPHY-MIB |
| 1.3.6.1.4.1.4491.2.1.30.1.1 | docsRphyRpdDevMibObjects | DOCS-RPHY-MIB |
| 1.3.6.1.4.1.4491.2.1.30.1.1.15 | docsRphyRpdDevUsSignalQualityTable | DOCS-RPHY-MIB |
| 1.3.6.1.4.1.4491.2.1.30.1.1.15.1 | docsRphyRpdDevUsSignalQualityEntry | DOCS-RPHY-MIB |
| 1.3.6.1.4.1.4491.2.1.30.1.1.15.1.3 | docsRphyRpdDevUsSignalQualityRxMer | DOCS-RPHY-MIB |