docsIf31CmUsOfdmaChanSubcarrierSpacing
DOCS-IF31-MIB ·
.1.3.6.1.4.1.4491.2.1.28.1.13.1.6
Object
column
kHz SubcarrierSpacingType
This attribute defines the subcarrier spacing associated with a particular FFT mode configured on the OFDMA upstream channel. If it is 2K mode, then the subcarrier spacing is 50kHz. If it is 4K mode, then the subcarrier spacing is 25kHz.
Context
- MIB
- DOCS-IF31-MIB
- OID
.1.3.6.1.4.1.4491.2.1.28.1.13.1.6- Type
- column
- Access
- readonly
- Status
- current
- Units
- kHz
- Parent
- docsIf31CmUsOfdmaChanEntry
- Table
- docsIf31CmUsOfdmaChanTable
- Siblings
- 10
Syntax
kHz SubcarrierSpacingType
- Source
- SubcarrierSpacingType
- Base type
Integer32
Values & Constraints
Type Constraints
range: 25
range: 50
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| docsIf31CmUsOfdmaChanConfigChangeCt This attribute contains the value of the Configuration Change
Count field in the Upstream Channel Descriptor (UCD) MAC
Management Message corresponding to this OFDMA channel. | column | Unsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.13.1.1 |
| docsIf31CmUsOfdmaChanTxPower This attribute represents the operational transmit power for
the associated OFDMA upstream channel. | column | dBmV DOCS-IF-MIBTenthdBmV | .1.3.6.1.4.1.4491.2.1.28.1.13.1.10 |
| docsIf31CmUsOfdmaChanPreEqEnabled This attribute defines whether pre-equalization is enabled on
the associated OFDMA upstream channel. | column | SNMPv2-TCTruthValue | .1.3.6.1.4.1.4491.2.1.28.1.13.1.11 |
| docsIf31CmUsOfdmaChanSubcarrierZeroFreq This attribute defines the lower edge frequency of the OFDMA
upstream channel | column | Hz SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.13.1.2 |
| docsIf31CmUsOfdmaChanFirstActiveSubcarrierNum This attribute defines the upper edge of the OFDMA upstream
channel. The minimum channel width for an OFDMA upstream
channel is 6.4 MHz in 4K mode and 10MHz in 2K mode. The valid
… | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.13.1.3 |
| docsIf31CmUsOfdmaChanLastActiveSubcarrierNum This attribute defines the last active subcarrier number.
The valid range is 74 to 3947. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.13.1.4 |
| docsIf31CmUsOfdmaChanNumActiveSubcarriers This attribute defines the number of active subcarriers within
the OFDMA upstream channel. The valid range is 1 to 3800. | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.13.1.5 |
| docsIf31CmUsOfdmaChanCyclicPrefix Cyclic prefix is added in order to enable the receiver to
overcome the effects of inter-symbol interference (ISI) and
inter-carrier interference caused by microreflections in the
… | column | number of samples UsOfdmaCyclicPrefix | .1.3.6.1.4.1.4491.2.1.28.1.13.1.7 |
| docsIf31CmUsOfdmaChanRollOffPeriod Windowing is applied in order to maximize channel capacity
by sharpening the edges of the spectrum of the OFDMA signal.
Windowing is applied in the time domain by tapering (or
rol… | column | number of samples UsOfdmaRollOffPeriod | .1.3.6.1.4.1.4491.2.1.28.1.13.1.8 |
| docsIf31CmUsOfdmaChanNumSymbolsPerFrame This attribute is the number of symbol periods per frame.
For channel bandwidth greater than 72MHz, the maximum number
of symbol periods per frame is 18 for 2K mode and 9 for 4K
m… | column | SNMPv2-SMIUnsigned32 | .1.3.6.1.4.1.4491.2.1.28.1.13.1.9 |