Configuring Rectangular Clipping - Agilent Technologies X Series User Manual

Configuring Rectangular Clipping

Use this example to configure rectangular clipping. Rectangular clipping clips the I and Q data
independently. For more information about rectangular clipping, refer to
Peak–to–Average Power" on page
CAUTION Clipping is non–reversible and cumulative. Save a copy of the waveform file before you
apply clipping.
Copy a Waveform File
1. Display the signal generator's files: Press File > Catalog Type > More > Volatile Segments.
2. Highlight the waveform RAMP_TEST_WFM.
3. Press Copy File.
4. Name the copy (in this example, the name is MY_TEST_REC) and press Enter.
Apply Rectangular Clipping to the Copied Waveform File
1. Open the DUAL ARB Waveform Utilities menu: Press Mode > Dual ARB > More > Waveform Utilities.
2. In the list of files, highlight the copied file (in this example, MY_TEST_REC).
3. Create the CCDF plot: Press Plot CCDF.
4. Observe the shape and position of
the waveform's curve (the dark line
in the example at right).
5. Activate rectangular clipping: Press
Return > Clipping > Clipping Type until
|I|,|Q| highlights.
6. Set 80% clipping for the I data: Press
Clip |I| To > 80 > %.
7. Set 40% clipping for the Q data: Press
Clip |Q| To > 40 > %.
8. Apply the rectangular clipping to the waveform: Press Apply to Waveform.
9. Create the CCDF plot (see the
example at right): Press Plot CCDF.
10. Observe the waveform's curve after
clipping.
Note the reduction in
peak–to–average power relative to the
previous plot.
Agilent X-Series Signal Generators User's Guide
189.
Basic Digital Operation (Option 653/655/656/657)
"How Clipping Reduces
Example waveform curve before clipping
Example waveform curve after rectangular clipping
Clipping a Waveform
193