Measurements and Results
R&S
®
FSW
299User Manual 1173.9411.02 ─ 43
For statistics measurements with the R&S FSW, the number of samples to be mea-
sured is defined instead of the sweep time. Since only statistically independent sam-
ples contribute to statistics, the sweep or measurement time is calculated automatically
and displayed in the channel bar ("Meas Time"). The samples are statistically inde-
pendent if the time difference is at least 1/RBW. The measurement time is, therefore,
expressed as follows:
Meas Time = N
Samples
/RBW
Remote command:
CALCulate<n>:STATistics:NSAMples on page 968
Gated Trigger
Activates and deactivates gating for statistics functions for the ACP and the CCDF
measurements. If activated, the trigger source is changed to "External Trigger 1". The
gate ranges are defined using the Edit Gate Ranges function.
Remote command:
[SENSe:]SWEep:EGATe:TRACe<t>[:STATe<gr>] on page 970
Edit Gate Ranges
Opens a dialog box to configure up to 3 gate ranges for each trace. For details see
Chapter 7.8.5.2, "Gate Range Definition for APD and CCDF", on page 299.
Adjust Settings
Adjusts the level settings according to the measured difference between peak and min-
imum power for APD measurement or peak and mean power for CCDF measurement
in order to obtain maximum power resolution. Adjusts the reference level to the current
input signal.
Remote command:
CALCulate<n>:STATistics:SCALe:AUTO ONCE on page 972
7.8.5.2 Gate Range Definition for APD and CCDF
Access: "Overview" > "Select Measurement" > "APD"/"CCDF" > "APD Config"/ "CCDF
Config" > "Edit Gate Ranges"
You can configure gate ranges for gated triggering in statistical measurements.
For background information on defining gate ranges see Chapter 7.8.4, "APD and
CCDF Basics - Gated Triggering", on page 296.
The remote commands required to perform these tasks are described in Chap-
ter 14.5.9.3, "Using Gate Ranges for Statistical Measurements", on page 969.
Statistical Measurements (APD, CCDF)
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