The Spectrum Application (RF Measurements)
R&S
®
FPL1000
222
User Manual 1178.3370.02 ─ 09
X-axis ref level:
-10 dBm
X-axis range APD:
100 dB
X-axis range CCDF:
20 dB
Y-axis upper limit:
1.0
Y-axis lower limit:
1E-6
Remote command:
CALCulate<n>:STATistics:PRESet
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
7.2.9.6
How to Perform an APD or CCDF Measurement
The following step-by-step instructions demonstrate how to perform basic statistic
measurements.
For remote operation, see
Chapter 11.6.9.7, "Programming Example: Measuring Sta-
To start a basic statistic measurement
1. Press the [MEAS] key, then select the "APD" or "CCDF" measurement.
2. Start a sweep.
As soon as the defined number of samples have been measured, the statistical
evaluation is displayed.
To perform a statistic measurement using gate ranges
For pulsed signals, the transmission intervals should not be included in the statistical
evaluation. Thus, you must define gate ranges to be included in the measurement.
1. Press the [MEAS Config] key, then select the "APD Config" or "CCDF Config" soft-
key.
The "APD""APD" or "CCDF" dialog box is displayed.
2. Select the "Edit Gate Ranges" button.
3. Define the time period for which the input signal is to be analyzed, for example the
duration of 3 signal pulses.
Measurements and Results
