Status in source: current.
Technical details
{
"smi_kind": "OBJECT-TYPE",
"definition": [
"docsPnmCmUsPreEqTable",
"OBJECT-TYPE",
"SYNTAX",
"SEQUENCE",
"OF",
"DocsPnmCmUsPreEqEntry",
"MAX-ACCESS",
"not-accessible",
"STATUS",
"current",
"DESCRIPTION",
"\"This object provides access to CM upstream pre-equalizer coefficients. The CM pre-equalizer coefficients and the CMTS upstream adaptive equalizer coefficient update values, when taken together describe the linear response of the upstream cable plant for a given CM. During the ranging process, the CMTS computes adaptive equalizer coefficients based on upstream probes; these coefficients describe the residual channel remaining after any pre-equalization. The CMTS sends these equalizer coefficients to the CM as a set of Transmit Equalization Adjust coefficients as part of the ranging process. The CM Pre-Equalizer coefficients are expressed as 16 bit two's complement numbers using s2.13 format. The power averaged over all coefficients approximately 1, in order to avoid excessive clipping and quantization noise. The Pre-Equalizer coefficient update values sent to the CM by the CMTS in the RNG-RSP are expressed as 16 bit two's complement numbers using s1.14 format. The CM provides the capability to report its upstream pre-equalizer coefficients (full set or summary) upon request. The CM also provides the capability to also report the most recent set of Transmit Equalization Adjust coefficients which were applied to produce the reported set of upstream pre-equalizer coefficients. The CM indicates the status of the most recent Transmit Equalization Adjust coefficients sent to it by the CMTS. If the CM was able to apply the coefficients it sets the status to success(2). If the CM was unable to fully apply the adjustments (for example, due to excess tilt or ripple in the channel), and it was necessary for the CM to clip the coefficients, it sets the status to clipped(3). If the CM modified the coefficients other than by simply clipping them, it sets the status to other(1). If for some reason the CM is unable to apply the adjustments at all, it sets the status to rejected(4). The 'docsPnmCmUsPreEqFileEnable' object is used to create files. Other objects are updated as read. This table will have a row for each ifIndex for the modem. \"",
"REFERENCE",
"\"DOCSIS 3.1 Cable Modem Operations Support System Interface Specification CM-SP-CM-OSSIv3.1, PNM section.\"",
"::=",
"{",
"docsPnmCmObjects",
"10",
"}"
],
"syntax_tree": [
[
"conceptualTable",
[
"row",
"DocsPnmCmUsPreEqEntry"
]
],
null,
[
"MaxAccessPart",
"not-accessible"
],
[
"Status",
"current"
],
[
"DESCRIPTION",
"This object provides access to CM upstream pre-equalizer coefficients. The CM pre-equalizer coefficients and the CMTS upstream adaptive equalizer coefficient update values, when taken together describe the linear response of the upstream cable plant for a given CM. During the ranging process, the CMTS computes adaptive equalizer coefficients based on upstream probes; these coefficients describe the residual channel remaining after any pre-equalization. The CMTS sends these equalizer coefficients to the CM as a set of Transmit Equalization Adjust coefficients as part of the ranging process. The CM Pre-Equalizer coefficients are expressed as 16 bit two's complement numbers using s2.13 format. The power averaged over all coefficients approximately 1, in order to avoid excessive clipping and quantization noise. The Pre-Equalizer coefficient update values sent to the CM by the CMTS in the RNG-RSP are expressed as 16 bit two's complement numbers using s1.14 format. The CM provides the capability to report its upstream pre-equalizer coefficients (full set or summary) upon request. The CM also provides the capability to also report the most recent set of Transmit Equalization Adjust coefficients which were applied to produce the reported set of upstream pre-equalizer coefficients. The CM indicates the status of the most recent Transmit Equalization Adjust coefficients sent to it by the CMTS. If the CM was able to apply the coefficients it sets the status to success(2). If the CM was unable to fully apply the adjustments (for example, due to excess tilt or ripple in the channel), and it was necessary for the CM to clip the coefficients, it sets the status to clipped(3). If the CM modified the coefficients other than by simply clipping them, it sets the status to other(1). If for some reason the CM is unable to apply the adjustments at all, it sets the status to rejected(4). The 'docsPnmCmUsPreEqFileEnable' object is used to create files. Other objects are updated as read. This table will have a row for each ifIndex for the modem."
],
[
"REFERENCE",
"DOCSIS 3.1 Cable Modem Operations Support System Interface Specification CM-SP-CM-OSSIv3.1, PNM section."
],
null,
null,
null
]
}