Keysight Technologies N5171B EXG, Руководство пользователя

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234 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Basic Digital Operation (Option 653/655/656/657)
Clipping a Waveform
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 “How Clipping Reduces
Peak–to–Average Power” on page 230 .
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.
Clipping is non–reversible and cumulative. Save a copy of the waveform
file before you apply clipping.
Example waveform curve before clipping
Example waveform curve after rectangular
clipping