Configuration / DPBO Low Freq Override Help

The DPBO Low Freq Override profile allows configuration of the ITU-T G.997.1, paragraph 7.3.1.2.13 Downstream Power Back-Off DPBO low frequency override breakpoints (referred to as DPBOLFO in the ITU-T document). There are a maximum of 16 breakpoints. This set of breakpoints defines the PSD mask that overrides DPBO at low frequencies. If LFO profile is not created or configured for a default DPBO data set no default is needed or provided.

To view the most current information, click the Refresh button.

To modify an DPBO Mask, select the mask, then click the Modify button.

For further reference on these settings, refer to ITU-T G.997.1.

Profile

Profile Index Index number for the profile.

FrequencyN

(N=1 to 16)

Assumed exchange PSD mask (EPSD) for the Breakpoint Frequency.  

Values: 0 (disabled) to 29998 (in 1 KHz increments)

Note the following when setting this parameter:

ADSL2+:
Maximum 2.208 MHz
Spacing between tones 4.3125 kHz
Number of tone bins 0 ~ 511

VDSL2 (8a/b/c/d profiles):
Maximum 8.5 MHz
Spacing between tones 4.3125 kHz
Number of tone bins 0 ~ 1971

VDSL2 (12a/b profiles):
Maximum 8.5 MHz
Spacing between tones 4.3125 kHz
Number of tone bins 0 ~ 1971

VDSL2 (17a profile):
Maximum 17.664 MHz
Spacing between tones 4.3125 kHz
Number of tone bins 0 ~ 4095

VDSL2 (30a profile):
Maximum 29.99775 MHz
Spacing between tones 8.6250 kHz Number of tone bins 0 ~ 3478

LevelN

(N=1 to 16)

Assumed exchange PSD mask (DPBOEPSD) Breakpoint Level 1.

Values: -1275 to 0  (in 0.1 dBm/Hz)

 

July 8, 2011