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Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
289
User Manual 1178.8520.02 ─ 08
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Percent Marker (CCDF only)
Defines a probability value. Thus, the power which is exceeded with a given probability
can be determined very easily. If marker 1 is deactivated, it is switched on automati-
cally.
Remote command:
CALCulate<n>:MARKer<m>:Y:PERCent
Analysis Bandwidth
Defines the analysis bandwidth.
For correct measurement of the signal statistics, the analysis bandwidth has to be
wider than the signal bandwidth in order to measure the peaks of the signal amplitude
correctly. To avoid influencing the peak amplitudes, the video bandwidth is automati-
cally set to 10
MHz. The sample detector is used for detecting the video voltage.
The calculated measurement time is displayed for reference only.
Remote command:
[SENSe:]BANDwidth[:RESolution]
Number of Samples
Defines the number of power measurements that are taken into account for the statis-
tics.
For statistics measurements with the R&S
FSV/A, 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
The maximum number of samples is limited by the hardware capability. For gated trig-
gered APD or CCDF measurements, the maximum number is limited further, if neces-
sary, to accommodate for very small ranges within a relatively long period. In this case,
the smallest gate/period ratio is considered, and the number is adapted to capture full
periods of data. If the defined number of samples exceeds the limit, it is automatically
reduced to the maximum value.
Remote command:
CALCulate<n>:STATistics:NSAMples
Gated Trigger
Activates and deactivates gating for statistics functions for the ACP and the CCDF
measurements. The gate ranges are defined using the
Statistical measurements (APD, CCDF)