Motorola BSR 2000 manual Cable upstream power-level default

BSR 2000 Command Reference Guide Release 1.0

cable upstream power-level default

The BSR CMTS interface controls CM output power levels to meet the desired CMTS upstream input power level. Input power level adjustments to an upstream port compensate for CMTS signal degradation between the optical receiver and the upstream RF port.

The cable upstream power-level default command is used to set the upstream input power level in relative mode, which means that the input power level changes when the upstream channel width is changed. For example, if the input power level is +11 dBmV for a DOCSIS 3.2 MHz upstream channel bandwidth setting in relative mode and is changed to 1.6 MHz, the default receive power is +8 dBmV. The default power levels for the 3.2 MHz and 1.6 MHz channels are equal relative to their respective channel bandwidth settings

Caution: If the power level is not explicitly set on the upstream interfaces, they default to 0 dBmV in absolute mode with a 3.2 MHz, 2560 kilosymbols per second rate. Ensure that the correct power level is set on each upstream channel.

Table 11-3describes how the upstream channel bandwidth corresponds to the input power-level range and default power-level range for a specific upstream channel.

Table 11-3 Upstream Input Power Level Range Parameters

Upstream Channel	Default Power-level	Power-level
Bandwidth	Range	Range
200 KHz	-1 dBmV	-16 to +14 dBmV
400 KHz	+2 dBmV	-13 to +17 dBmV
800 KHz	+5 dBmV	-10 to +20 dBmV
1.6 MHz	+8 dBmV	-7 to +23 dBmV
3.2 MHz	+11 dBmV	-4 to +26 dBmV

Group Access

MSO

Command Mode

Interface Configuration (cable interface only)

11-96 MGBI 526363-001-00 Rev. B