This guide describes commanded power for upstream SC-QAMs on the Cisco cBR Router.
 Note |
The hardware components that are introduced in a given Cisco IOS-XE Release are supported in all subsequent releases unless otherwise specified. |
To view the new commanded power levels pr upstream, use the following command:
Router# show cable modem [ ip-address | mac-address | cable {slot /subslot /cable-interface-index}] verboseNote |
DOCSIS 3.1 Commanded Power feature is enabled by default. |
The following table lists the TLVs affected by the DOCSIS 3.1 Ranging Response (RNG-RSP) Commanded Power for upstream SC-QAMs:
|
Name |
Type |
DOCSIS 3.1 Value |
|---|---|---|
|
Power Level Adjust |
2 |
TX Power offset adjustment (signed 8-bit, 1/4-dB units) |
|
Power Offset |
12.4.4 |
TX Power offset adjustment (signed 8-bit, 1/4-dB units) |
|
Dynamic Range Window Upper Edge |
14 |
The upper edge of the Dynamic Range Window expressed in units 1/4 dB below the max allowable setting (Phi) [DOCSIS PHYv3.0]. |
|
Commanded Power |
17 |
This TLV contains the Dynamic Range Window value, P1.6load_min_set as well as the Transmit Power Level for each of the channels in the CM's Transmit Channel Set, expressed in units of quarter dBmV. |
The following table lists the sub-TLVs for DOCSIS 3.1 Commanded Power:
|
Name |
Type (1 byte) |
Length (1 byte) |
Value (Variable Length) |
|---|---|---|---|
|
Commanded Power |
17 |
5 + 3*N |
|
|
Dynamic Range Window |
17.1 |
1 |
The range, in decibels, of the maximum difference in power per 1.6 MHz between multiple transmitters in a cable modem’s Transmit Channel Set. |
|
List of Upstream Channel IDs and Corresponding Transmit Power Levels |
17.2 |
3*N |
Values for each channel in the TCS:
|
|
Description |
Link |
|---|---|
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Note |
The following table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. |
|
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
DOCSIS 3.1 Commanded Power for US SC-QAMs |
Cisco IOS XE Fuji 16.7.1 |
This feature was integrated on the Cisco cBR Series Converged Broadband Routers. |
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