Vdsl Line Profile Setup > Rfi Band - ZyXEL Communications VES1724-56 User Manual

The following table describes the labels in this screen.
Table 37 VDSL DPBO Setup
LABEL
DPBOESEL
DPBOESCMA,
DPBOESCMB,
DPBOESCMC
DPBOMUS
DPBOFMIN
DPBOFMAX
DPBOEPSD
DPBOESEL
Break Point
Tone Index
Frequency (kHz)
PSD level (dBm/Hz)
Modify
Cancel
Clear
9.3.5 VDSL Line Profile Setup > RFI Band
Click the Modify link next to the RFI BAND field in the VDSL Line Profile Setup screen to open
the screen as shown next. Use this screen to specify the RFI bands through which the Switch and
VES1724-56 User's Guide
DESCRIPTION
Specify the electrical length of the cable between the Switch and CPE devices. See
UPBO/DPBO Electrical Length
These parameters define a cable model that is used to describe the frequency
dependent loss of exchange-side cables.
This defines the assumed minimum usable receives PSD mask (in dBm/Hz) for
exchange based services, used to modify parameter DPBOFMAX defined below. Enter
from 0 to -127.5 dBm/Hz in steps of 0.5 dB.
This defines the minimum frequency from which the DPBO shall be applied. Enter from 0
kHz to 8832 kHz in steps of 4.3125 kHz.
This defines the maximum frequency at which DPBO may be applied. Enter from 138
kHz to 29997.75 kHz in steps of 4.3125 kHz.
DPBOEPSD (Assumed Exchange PSD Mask) defines the PSD mask that is assumed to be
exchanged at CO. Use this graph to view PSD level to frequency relationship. The
horizontal is frequency in MHz and vertical is power level in dBm/Hz.
Click Custom to have the breakpoints and PSD levels configured in the bottom of the
screen updated to this DPBOEPSD graph.
Alternatively, you can click one of the others (CAB_ANSI, EX_ANSI, CO_PSD,
CAB_ETSI, EX_ETSI, Flat_PSD) to use a pre-defined PSD mask.
Specify the electrical length of the cable between the Switch and CPE. See
Electrical Length on page 100.
This index number identifies each incremental break point.
A tone is a sub-channel of a VDSL band. DMT divides VDSL bands into many 4.3125 kHz
tones.
Enter an increased number (than previous row) from 0 to 4096 in this field that is also
the horizontal of the DPBOEPSD graph.
This read-only field displays a frequency that equals the tone index multiple 4.3125
dBm/Hz. This field automatically calculates after a Tone Index value is entered.
Enter the PSD level for the Y-axis of DPBOEPSD graph.
Click this to save the settings to the Switch and return to the previous screen.
Click Cancel to reset the fields to your previous configuration.
Click Clear to clear the fields to the factory defaults.
on page 100.
Chapter 9 VDSL Setup
UPBO/DPBO
113