Keysight E6610A, User And Programming Manual

Page: 49 / 108

8 GUI Menus and Measurement Displays
Keysight E6610A User and Programming Guide 49
CCDF
This measurement displays the complementary cumulative distribution function for
the measured power in the captured signal, which indicates how much time the signal
is at or above a certain power level. The probability % is on the y-axis and the peak-
to-average ratio (PAR) is on the x-axis. The gray trace represents a Gaussian
distribution for reference. The following numeric results are available:
Sample rate
Signal capture duration
Number of samples
RMS power
Peak power
Crest factor
Average: probability of the average power
PAR (10%), PAR (1%), PAR (0.10%), PAR (0.01%), PAR (0.001%), and PAR
(0.0001%): PAR levels corresponding to each of the listed probability levels.
PAR (1%) = 6.5 dB means that 1% of the power measurements were at or above
a PAR of 6.5 dB.