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Broadcom ACPL-C799 User Manual page 4

Kit, isloated sigma-delta modulator

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ACPL-C799 Evaluation Kit Board
User Guide
Application GUI
Figure 4 Application GUI
The application GUI has three displays, two of the displays showing the signal in time domain and frequency domain, and the
third showing SNR and SNDR historical plots. The time domain signal can be displayed in terms of ADC count or voltage level
(mV) by checking the Display (mV).
On the right of the displays, real time minimum, maximum, and average signal levels are shown in time domain in terms of
either mV or ADC count. SNR, SNDR, 2nd harmonic and 3rd harmonic levels are displayed in frequency domain.
1.
Click Start to start capturing the input signal. The configured board frequency is captured under the Frequency box and the
part number or evalboard type in the Board/Product.
2.
You can save the signal, FFT and SNR/SNDR history data into text files that are readable and compatible to Microsoft Excel by
selecting the Datalog (signal, fft and snr/sndr history) box. The snr.txt, signal.txt, and fft.txt are stored in the same file
directory as the application GUI.
3.
If there is an updated FPGA bitfile or you hae configured a new bitstream file, this can be can be uploaded easily by clicking the
Load FPGA Bit File on the top-left corner of the application GUI. When the bitfile is being uploaded, the green DONE LED goes
off and the red UPLOAD LED comes on. When uploading is completed, the red UPLOAD LED goes off, while the green DONE
LED comes on again to signal completion. The FPGA LOAD Completed! pop-up appears, as shown in
Broadcom
- 4 -
Application GUI
Figure
5.

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