Actelis Networks ML700 - Configuring SNR Margin Profiles

Quality Management Modem Profiles Management Model
ML700 User Manual 6-25
3. Define the profile according to the following table descriptions. Click OK to save. The
new profile will be listed in the glance pane. It will also be removed from the list of
available profile AIDs and added to the available profile for use as templates under the
Copy from Profile option.
Table 31: Configuring SNR Margin Profiles
To....
Do this....
Initiate a new profile:
 Choose from the available Profile AIDs.
 Assign the profile an identifiable Description (i.e. ADSL2 Plus...)
 Do one of the following: either upload values from an existing file and modify them
according to the following step, or define each parameter as described in the next
steps.
Copy values from an
existing profile:
 Under Copy from Profile (bottom of the pane), choose from the list of predefined
profiles.
 Click Get. The parameters will be updated.
 Modify the required parameters to customize them to your needs.
 Click OK. The new profile will be added to the SNR Profile pane.
Set the US = DS
 Checkmark Set Upstream Values as Downstream if US & DS settings are identical.
Set the general
parameters
Target Noise Margin - The required Noise Margin that the modem must
achieve during activation (the margin is calculated from the SNR that provides
BER of 10-7).
Note: during multi-pair activation (bonded link) the final SNR margin (once the
calibration process has finished) may slightly differ from the configured Target
SNR Margin.
Minimum Noise Margin - minimum Noise Margin that the modem will
tolerate. If the noise margin falls below this level, the modem should attempt to
increase its power output. If that is not possible, the modem will attempt to re-
initialize.
Rate Adaptation Mode
This parameter defines the modem's behavior during initialization and during
show time towards noise changes. Three Rate Adaptation Modes are supported:
 Force Rate - Modem is "forced to initialize at the Maximum rate defined in the
Rate Profile (see Data Rate Profile configuration (on page 6-4)). The
modem fails initialization if the Target SNR Margin cannot be supported at the
required rate.
 RA at Init - Modem is initialized with data rate between the Minimum
Maximum data rate that satisfies the Target SNR Margin. The Modem fails
initialization if the target SNR margin cannot be supported by the minimal
required rate (the required rate cannot be maintained). Data rate is
automatically selected at startup only and does not change after that.
 Dynamic with SRA - Rate is automatically selected at init (as in the case of RA
at Init) and is continuously adapted during operation. Rate Adaptation is
performed when the conditions specified for Upshift Noise Margin and Upshift
Interval - or for Downshift Noise Margin and Downshift Interval - are satisfied.
Rate Upshift (or Downshift) occurs when the noise margin is above Upshift (or
below downshift) Noise Margin threshold for a period longer than Minimum
Time Interval for Upshift (or downshift).