Instrument Functions
NRP2
140User Manual 1173.9140.02 ─ 07
Statistics evaluation function
Note: A linear (lin) or logarithmic (log) scale is available for "CCDF" and
"CDF". The
"PDF" can only be displayed linearly.
"CCDF"
Complementary Cumulative Distribution Function. Displays the prob-
ability of the envelope power being higher than the corresponding X
axis power value.
"CDF"
Cumulative Distribution Function.
Displays the probability of the envelope power being lower than the
corresponding X axis power value.
"PDF"
Probability Density Function.
Displays a normalized distribution density of the envelope power. The
measurement result is dimensionless and – in contrast to a non-nor-
malized "PDF"
– is independent of the magnitude of the average
power value (Av). Integrating the normalized "PDF" over power pro-
vides the average power value (Av).
Remote command:
[SENSe<[1]..4>]:
FUNCtion[:
ON] on page 269
Absolute X-Scaling
Scales the X axis in terms of absolute power (dBm) if activated
Normalizes the X axis with respect to average power (dB) if deactivated.
Trace 1 / 2
Selects tab "Trace 1" or "Trace 2" to configure the statistic measurement for the 1st or
2nd trace.
An internal AWGN source is available for the second trace, thus providing a standard
signal reference.
Channel
Selects the channel for the respective trace. A statistical evaluation of combined
results from different channels, e.g. power ratios, is not supported.
Aperture
Sets the length of the aquisition interval with unsynchronized acquisition (
"Cont", see
"Gate / Cont"
on page 137).
In addition to, and independent of, the setting of the aperture time for the measurement
of an average power value (Av) (chapter 4.2.1.2, "Continuous average-power mea-
surements", on page 66 ), you can use this parameter to set the length of the
unsynchronized time interval for the statistical analysis of the signal.
Remote command:
[SENSe<[1]..4>]:STATistics:TIME on page 283
Samples
Enters the required minimum number of samples.
Displaying traces
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