docsPnmCmtsUsImpNoiseFileName
DOCS-PNM-MIB ·
.1.3.6.1.4.1.4491.2.1.27.1.3.4.1.12
Object
This attribute is the name of the file with the captured impulse noise
data at the CMTS that is to be downloaded using TFTP to the PNM server.
This value can only be changed while a test is not in progress. An attempt
to set this value while the value of 'docsPnmCmtsUsImpNoiseMeasStatus'
is 'busy' will return 'inconsistentValue'.
If the value of this object is the DEFVAL (empty string), then a default
filename value will be used. Otherwise the value set will be used as
the filename.
If a default filename value is used, it is generated as the test name
plus a unique CCAP identifier (either a loopback address (IPv4 or IPv6)
or FQDN), plus the 'epoch time'. The epoch time (also known as 'unix time')
is defined as the number of seconds that have elapsed since midnight
Coordinated Universal Time (UTC), Thursday, 1 January 1970.
Hence, the format would be:
PNMCcapImpNoise_<Unique CCAP Identifier>_<epoch>
For example: PNMCcapImpNoise_ccap1.boulder.cablelabs.com_1403405123
The data file is created when the Enable is cleared by the PNM server.
If the NumEventsCounted attribute is zero when the Enable is cleared,
then no file will be created by the CMTS.
The header is comprised of ordered fixed-length fields. Unless
otherwise specified, the header fields contain hex values that are
right-justified within the field. If necessary the field is left-padded
with zero values.
Syntax of the file is as follows:
File Type set to '504E4D67' (without the quotes) 4 bytes
Capture Time 4 bytes
ifIndex 4 bytes
Unique CCAP ID 256 bytes
Start trigger level 4 bytes
End trigger level 4 bytes
Number of events being reported 4 bytes
Length (in bytes) of Impulse Event Data 4 bytes
Impulse Noise Capture Data ImpulseNoiseEventType
Context
- MIB
- DOCS-PNM-MIB
- OID
.1.3.6.1.4.1.4491.2.1.27.1.3.4.1.12- Type
- column
- Access
- readwrite
- Status
- current
- Parent
- docsPnmCmtsUsImpNoiseEntry
- Table
- docsPnmCmtsUsImpNoiseTable
- Siblings
- 11
Syntax
SNMP-FRAMEWORK-MIBSnmpAdminString
- Source
- SNMP-FRAMEWORK-MIBSnmpAdminString
- Base type
OctetString
Values & Constraints
Type Constraints
range: 0..255
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| docsPnmCmtsUsImpNoiseEnable This object causes the CMTS to begin the measurement of a probe for
the selected CM or for a quiet period if the UseIdleSid attribute is
enabled. The Enable attribute is cleared i… | column | SNMPv2-TCTruthValue | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.1 |
| docsPnmCmtsUsImpNoiseLastEvtAvgPwr This attribute represents the average power measured during the last
recorded event. | column | dBmV SNMPv2-SMIInteger32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.10 |
| docsPnmCmtsUsImpNoiseMeasStatus This attribute is used to determine the status of the measurement.
When the Status = SampleReady, the CCAP has completed the measurement
and the Enable attribute has been cleared. | column | MeasStatusType | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.11 |
| docsPnmCmtsUsImpNoiseFreeRunDuration This attribute provides length of time to perform the measurement if
the StartTriggerLevel is set to zero.
This object cannot be changed while a capture is in progr… | column | seconds Unsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.2 |
| docsPnmCmtsUsImpNoiseStTrigLvl An individual burst event starts when the burst noise exceeds the
StartTriggerLevel. If the StartTriggerLevel is set to zero then the
free run measurement starts when the Enable i… | column | microvolts SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.3 |
| docsPnmCmtsUsImpNoiseEndTrigLvl The measurement of an individual burst event ends when the burst noise
falls below the EndTriggerLevel. If the StartTriggerLevel is set to zero
then the EndTriggerLevel is not use… | column | microvolts SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.4 |
| docsPnmCmtsUsImpNoiseCenterFrq This attribute defines the center frequency for the noise power measurement.
This object cannot be changed while a capture is in progress. It will
return a value of… | column | Hz SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.5 |
| docsPnmCmtsUsImpNoiseMeasBw This attribute defines the bandwidth for the noise power measurement.
The MeasurementBw is the -3 dB bandwidth; the occupied bandwidth is
typically 1.25 times the measurement band… | column | kHz Unsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.6 |
| docsPnmCmtsUsImpNoiseNumEvtsCnted This attribute is used to indicate how many impulse noise events have
been recorded since the enable was set to true. This value will be 1024
in steady state, after the ring buffe… | column | Unsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.7 |
| docsPnmCmtsUsImpNoiseLastEvtTimeStamp This attribute provides represents the timestamp corresponding to the
start of the last recorded event. The measurement is time-stamped using
the 64-bit extended timestamp. | column | OctetString | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.8 |
| docsPnmCmtsUsImpNoiseLastEvtDuration This attribute provides represents the time corresponding to the
duration of the last recorded event. The EventDuration is expressed in
ns. | column | nanoseconds SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.27.1.3.4.1.9 |