1. Importing 8b ADC Data for Analysis in Wavevision5 and High Speed Data Converter Pro software tools

2. Importing with Wavevision5

3. Locating Data Files for easy import
Copy the data files here:
C:\Users\Public\Documents\National Semiconductor\WaveVision5\Data\Imports\

4. Open Wavevision5 – Pin Channel Tab Open

5. Click on Import Wavevision4 or Single/Double Column ASCII data file button (4th from left)

6. Import ASCII Data dialog box opens

7. Set desired Sampling Rate and Sample Width then click Import

8. Number of samples must be 2^n

9. Data is Imported to Time Domain Plot

10. Select FFT Plot

11. Unpin Channels Tab, pin FFT Readouts

12. Import another file, this time 25 MHz Fin

13. Truncated to 2^n samples

14. Resulting Time Domain plot

15. Resulting FFT – odd shape even though windowing is used

16. Check Time Domain Waveform – drag bottom scroll bar to view

17. Discontinuity in Waveform Causing bad FFT

18. Importing with HSDC Pro

19. Copy data to location below:
Libraries\Documents

20. Launch HSDC Pro

21. Click Cancel on Select Board dialog

22. Click File>Import Data File

23. Select desired file

24. Select resolution – click OK

25. Initial view after import

26. Enter ADC Output Data Rate – 1500M

27. Change Test Selection to Time Domain

28. If waveform isn’t centered click Zoom All icon to right of plot window

29. HSDC Pro Import Data Processing
Data file used for these examples is decimal representation of offset binary data from ADC08D1520 ADC
HSDC Pro expects data centered around 0. For an 8 bit converter this corresponds to -128 to +127
Upon import HSDC Pro shifts this data to show sample values from 0 to 255
Since data imported was already from 0 to 255, the up-shifted version is centered around 255 instead of 128
The FFT results are still calculated properly