CCDF (DOCSIS 4.0 Downstream)

Menu Path: Trace > Data > Channel (x) > CCDF

The CCDF trace data displays the complementary cumulative distribution function (CCDF) for the selected input channel.

The CCDF is computed from the segment of the OFDM signal specified by the Measurement Interval and Measurement Offset.

Interpreting Trace Results

The CCDF trace ordinates are units of percent (%) for the y-axis and power (dB) for the x-axis. Power on the x-axis is relative to the signal average power, so 0 dB is the average power of the signal. Therefore, a marker readout of

Trace A Marker 2 dB 12 %

means there is a 12% probability that the signal power will be 2 dB or more above the average power.

For more information, see CCDF trace data (Reference book).

See Also

Available Trace Data (DOCSIS 4.0 Downstream)