Bird Technologies SA-6000EX - Manual (Page 128)

Bird Technologies
112
Crest Factor
Crest factor (CF) is the ratio of the peak and average powers, in dB.
The WPS calculates the Crest Factor from the Forward Peak and
Average Power measurements.
Complementary Cumulative Distribution Function (CCDF)
CCDF measures the amount of time the power is above a threshold.
Equivalently, it is the probability that any single measurement will be
above the threshold. The WPS samples the power over a 300 ms win-
dow and compares it to a user-specified threshold, in Watts. The time
above the threshold relative to the total time is the CCDF.
Crest Factor
10 dB CDMA
Signal
100 W Peak
10 W Ave
CCDF
100 W Signal
80 W Threshold
20% CCDF
Average Power
Peak Envelope Power
0 W
100 W
50 W
80 W
0 W
50 W
100 W