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29-15lre psd-value
This command defines a power level for each of the PSD breakpoints. Use
the no form to restore the default setting.
Syntax
lre psd-value breakpoint psd-value
no lre psd-value breakpoint
breakpoint – Frequency breakpoint within the power spectral density
(PSD) as defined by the lre psd-breakpoints command
(page 29-12).
psd-value – Value of PSD at the specified breakpoint. (Range: An
integer from 0 to 255, which is used to calculate a power level in
terms of -140 + (psd-value) * 0.5 dBm/Hz)
Default Setting
255 (-12.5 dBm/Hz)
Command Mode
Global Configuration
Interface Configuration (VDSL Port)
Command Usage
Enter this command in global configuration mode to configure a PSD
value for all VDSL ports, or in interface mode to configure it for a
specific VDSL port.
The PSD values are used in conjunction with the frequency
breakpoints (defined by the lre psd-breakpoints and lre
psd-frequencies commands, page29-12 and 29-13) to create a PSD
mask used for in-band spectrum shaping, set the Limit PSD Mask
required for compliance with local regulations, or set mask limits for
upstream power backoff. The methods used to calculate these various
PSD masks, and local regulations governing the power spectrum used
on VDSL lines are all described in ITU-T G.993.2.
Note that settings for the MIB PSD mask can only be configured
through an SNMP network management interface.