R&S FSL Cable TV Measurements (Option K20)
1300.2519.12 2.81 E-11
Fig. 2-58 Digital TV APD measurement
CCDF measurement
This measurement determines the complementary cumulative distribution function (CCDF) of the
complex base band signal. The measurement can also be performed in Spectrum Analyzer mode, but
in the Cable TV Analyzer mode most of the parameters are set automatically. For details on the
measurement background refer to chapter section Amplitude Distribution Measurements.
Test setup:
Refer to the section Digital TV test setup.
Procedure:
1. Press the MEAS key.
2. Press the Digital TV softkey.
3. Press the More softkey.
4. Press the CCDF softkey.
5. To determine the power exceeded with a given probability, press the Percent Marker softkey.
6. To change the scaling parameters of the x– and y–axis:
Press the Scaling softkey.
Press the corresponding softkey to change the parameters: x–Axis Signal Level, x–Axis Range,
y–Axis Max. Value, y–Axis Min. Value, Default Settings.
7. To adjust the input attenuator, press the Adjust Attenuation softkey.
8. Press the RUN key.
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