Measurements on Modulated Signals R&S FSL
1300.2519.12 2.34 E-11
Measurement example – Measuring the APD and CCDF of white noise generated by
the R&S FSL
1. Set the R&S FSL to its default state.
Press the PRESET key.
The R&S FSL is in its default state.
2. Configure the R&S FSL for APD measurement
Press the AMPT key and enter –60 dBm.
The R&S FSL's intrinsic noise is displayed at the top of the screen.
Press the MEAS key.
Press the More softkey.
Press the APD softkey.
The R&S FSL sets the frequency span to 0 Hz and measures the amplitude probability
distribution (APD). The number of uncorrelated level measurements used for the measurement
is 100000. The mean power and the peak power are displayed in dBm. The crest factor (peak
power – mean power) is output as well.
Fig. 2-27 Amplitude probability distribution of white noise
3. Switch to the CCDF display mode.
Press the H key.
Press the CCDF softkey.
The CCDF display mode is switched on.
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