CCDF (802.11b/g DSSS/CCK/PBCC)

Menu Path: Trace > Data > Channel X > CCDF where X is the selected input channel.

CCDF trace data displays the complementary, cumulative distribution function (CCDF Complementary Cumulative Distribution Function) for the selected input channel. The CCDF is computed from the segment of the OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. burst specified by the Measurement Interval and Measurement Offset.

The VSA plots CCDF using 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.

See Also

Available Trace Data (802.11b/g DSSS/CCK/PBCC)