SMC Networks TigerAccess SMC7816M - Manual (Page 700)

VDSL C
OMMANDS
29-18
lre pbo-config
This command sets a mask to reduce the power spectral density (PSD) of
transmitted signals at specified frequency breakpoints for upstream power
backoff. Use the no form to restore the default status.
Syntax
lre pbo-config
K1[0] Rx_PSD1 K1[1] Rx_PSD2 K1[2] Rx_PSD3
K1[3] Rx_PSD4 K1[4] Rx_PSD5 K1[5] Rx_PSD6
K2[0] Tx_PSD1 K2[1] Tx_PSD2 K2[2] Tx_PSD3
K2[3] Tx_PSD4 K2[4] Tx_PSD5 K2[5] Tx_PSD6
no lre pbo-config
• K1[0-5] – Frequency breakpoints for upstream bands DS1-DS3.
• Rx_PSD1-6 – Limitation on the PSD at specified breakpoint.
(Range: -1000000 to 1000000, in units of 1000 x decibel)
• K2[0-5] – Frequency breakpoints for downstream bands US0-US2.
• Tx_PSD1-6 – Limitation on the PSD at specified breakpoint.
(Range: -1000000 to 1000000, in units of 1000 x decibel)
Default Setting
K1[0] 0 K1[1] -60000 K1[2] -60000 K1[3] -60000 K1[4] 0 K1[5] 0
K2[0] 0 K2[1] -11200 K2[2] -7419 K2[3] -7419 K2[4] 0 K2[5] 0
Command Mode
Global Configuration
Command Usage
• The PSD values specified by this command are in units of 1000 x
decibel (dB). For example, 60000 means 60.0 dB. The actual power
levels implemented are in milliwatts per Hertz (dBm/Hz). For
example, you would enter -60000 with this command to specify a value
of -60 dBm/Hz.
• Upstream power back-off (UPBO) is used to mitigate far-end
crosstalk caused by upstream transmissions from shorter to longer
loops. The lre pbo-config command is used to reshape the PSD,
ensuring that the signals on short to long loops are compatible.