ADC MM702G2-W V5.x User Manual page 159

Step
4 • PSD Mode
(cont)
The Power Spectral Density (PSD) plots the variations of signal power with signal frequency for the
G.shdsl transmission between the modem and the DSLAM or the modem and another modem.
Symmetric PSD indicates that the PSD mask for both sides of the transmission (the CO- and remote-
side) are the same (symmetric).
Asymmetric PSD indicates that the PSD mask for both sides of the transmission (the CO- and
remote-side) are not the same (asymmetric). There are two unique numeric values
(AsymmetricRate1 and AsymmetricRate2) used to determine the asymmetric PSD mask based on
the Annex A or Annex B standard that you selected. AsymmetricRate1 is 784 KbpsKbps for Annex A
and 2312 Kbps for Annex B. AsymmetricRate2 is 1552 Kbps for Annex A and 2056 Kbps for Annex
B.
Both ends of the connection must be set for the same Symmetric or Asymmetric PSD. Default is
Symmetric.
• SNR Margin Limit
Identifies the minimum SNR margin (in decibels) that must exist when the G.shdsl connection is
synchronized and in order for the DSL MAR LED to be lit ON Green. The range of values is 0 to 15.
Default is 6dB.
• Reset Defaults
Default is False. The Reset Defaults option will not take effect until you save configuration and
reboot.
5 Click Apply.
6 Configure the Admin State parameter
7 Click Apply.
MM702G2-W-UM-03
Action
(Figure 6-57 on page 6-59). Set to Enable.
Chapter 6: Configuring Advanced Features
6-61