ZyXEL VES1724-56B2 User Guide - Page 120
Table 42, Label, Description
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Chapter 9 VDSL Setup the start of the next cluster. The Eq_INP histogram shows the level of INP required to prevent data errors and the IAT histogram shows time intervals between the impulse noise events. Figure 64 Impulse Noise Monitor Setup The following table describes the labels in this screen. Table 42 Impulse Noise Monitor Setup LABEL Name NearEnd FarEnd InpEqMode INMCC DESCRIPTION Enter a descriptive name for identification purposes. The parameters in this column relate to upstream transmissions. The parameters in this column relate to downstream transmissions. Select the way of computating equivalent INP in this profile. See ITU-T G.993.2 for more information. 0: In this mode, the INMCC value is 0 and the cluster length (the number of data symbols from the first to the last severely degraded data symbols in a cluster) is used to generate the histogram. Each set of consecutive severely degraded data symbols is considered as a separate impulse noise event. 1: In this mode, the specified INMCC value and cluster length are used to generate the histogram. This provides an upper bound on the level of the required INP. 2: In this mode, the specified INMCC value and the number of the severely degraded data symbols in a cluster are used to generate the histogram. This provides a lower bound on the level of the required INP. 3: In this mode, the specified INMCC value, cluster length, the number of the severely degraded data symbols in a cluster and the number of gaps in a cluster are used to generate the histogram. This provides the best estimate of the required INP level. Specify the cluster continuation value (0 to 64 DMT symbols) used for INM cluster indication. 120 VES1724-56 User's Guide