Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 4.222 E-11
CCDF – digital TV
This measurement determines the complementary cumulative distribution function (CCDF) of the
complex base band signal. The following parameters can be set:
Parameter
channel number
power exceeding probability
x– and y–axis scaling
The basic procedure is the following:
1. Press the MEAS key.
2. Press the Digital TV softkey.
3. Press the CCDF softkey.
4. To determine the power exceeded with a given probability, press the Percent Marker softkey.
5. 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 L, x–Axis Range,
y–Axis Max Value, y–Axis Min Value, Default Settings.
6. To adjust the input attenuator, press the Adjust Attenuation softkey.
7. Press the RUN key.
For a more detailed description of this measurement type refer to chapter "Advanced Measurement
Examples".
Tilt – TV analyzer
This measurement determines the frequency response of the cable TV network by measuring the
channel power of every channel. The whole measurement sequence can take some time, depending on
the number of channels. The following parameters can be set:
Parameter
span
modulation standard
The basic procedure is the following:
1. Select the appropriate channel table and activate it (for details refer to "To perform a measurement
using a channel table" on page 4.208).
2. Press the MEAS key.
3. Press the TV Analyzer softkey.
4. Press the Tilt softkey.
5. To restrict the channels to be measured, press the Tilt Setup softkey:
The Tilt Setup dialog box is displayed.
– To limit the frequency range, under Span, enter a start and stop frequency.
– To select only channels of certain modulation standards for the measurement, under
Modulation Standards, activate the modulation standards to be included in the measurement.
6. To adjust the range of the y–axis, press the Auto Range softkey.
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