Ccdf Display - Tektronix SPECMON3 Manual

RF Measurements
4. For each range you wish to test, select the desired Mask type from the drop-down list.
5. Set the limits as desired in the Abs Start, Abs Stop, Rel Start, and Rel Stop boxes. The values you
can edit depend on the mask type you select.
6. Verify that the Thrshld and Excrsn values are set as required. These are the values that define a spur.
7. Click Done to save your changes and close the Range and Limits Table window.
8. Click Run to begin testing.

CCDF Display

The CCDF (Complementary Cumulative Distribution Function) is a statistical characterization that plots
power level on the x-axis and probability on the y-axis of a graph. Each point on the CCDF curve shows
what percentage of time a signal spends at or above a given power level. The power level is expressed in
dB relative to the average signal power level. The CCDF Display also shows the Average power level
and the Peak/Average ratio.
To show the CCDF display:
1. Press the Displays button or select Setup > Displays. This shows the Select Displays dialog box.
2. From the Folders box, select RF Measurements.
3. Double-click the CCDF icon in the Available Displays box. This adds the CCDF icon to the Selected
displays box.
4. Click the OK button.
Elements of the CCDF Display
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SPECMON3 & SPECMON6 Printable Help
CCDF Display