R&S FSW Series, Руководство пользователя

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Measurements and Results
R&S
®
FSW
296 User Manual 1173.9411.02 ─ 43
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For each displayed trace:
Mean Mean power
Peak Peak power
Crest Crest factor (peak power – mean power)
10 % 10 % probability that the level exceeds mean power + [x] dB
1 % 1 % probability that the level exceeds mean power + [x] dB
0,1 % 0,1 % probability that the level exceeds mean power + [x] dB
0,01 % 0,01 % probability that the level exceeds mean power + [x] dB
Percent marker
In addition to the results for specific percentages in the table, a percent marker can be
activated for a freely selectable percentage. This marker indicates how many level val-
ues are over <x> % above the mean power.
Percent marker
As all markers, the percent marker can be moved simply by selecting it with a finger or
mouse cursor and dragging it to the desired position.
Diagram Scaling
The scaling for both the x-axis and y-axis of the statistics diagram can be configured.
In particular, you can restrict the range of amplitudes to be evaluated and the probabili-
ties to be displayed.
Remote commands:
CALCulate<n>:STATistics:CCDF:X<t>?
on page 974
CALCulate<n>:STATistics:RESult<res>?
on page 975
7.8.4 APD and CCDF Basics - Gated Triggering
Statistic measurements on pulsed signals can be performed using a gated trigger. An
external frame trigger is required as a time (frame) reference.
The gate ranges define the part of the measured data taken into account for the statis-
tics calculation. These ranges are defined relative to a reference point T=0. The gate
interval is repeated for each period until the end of the capture buffer.
The reference point T=0 is defined by the external trigger event and the instrument's
trigger offset.
For each trace you can define up to 3 separate ranges of a single period to be traced.
Statistical Measurements (APD, CCDF)