Table of Contents
Advertisement
13. Graph Window of VisualAnalog
2.
Repeat this procedure for the other channels, if desired
3.
Click the floppy-disk icon within the VisualAnalog Graph - AD9257 FFT window to save the
performance data as a .csv formatted file for plotting or analysis.
Troubleshooting Tips
Lack of SPI communication will cause difficulty in configuring the ADC.
Go to the Global tab of the SPIController window and push the Read button in the GENERIC
READ/WRITE window. This will read the contents of ADC register 0x00. If SPI communication is
working properly and the ADC is powered up, the value 0x18 hexadecimal will appear. If the
contents show 0x00, the ADC is not powered up or SPI communication is not working.
Check that there is correct power to the
HSC-ADC-EVALCZ.
Check that the USB cable is properly connected from the PC to the HSC-ADC-EVALCZ.
The LED on the VisualAnalog ADCDataCapture block should be green. If it is red, push the USB
button on the same block to refresh the connection.
If the FFT plot appears abnormal, do the following:
If you see an abnormal noise floor, go to the ADCBase0 tab of the SPIController window and
toggle the Chip Power Mode in MODES(8) from Chip Run to Reset and back.
If you see a normal noise floor when you disconnect the signal generator from the analog input, be
sure that you are not overdriving the ADC. Reduce the input level, if necessary.
AD9257-65EBZ
Rev 13 Nov 2013 00:23 | Page 14
or
AD9637-80EBZ
board, and to the
Figure
Advertisement
Table of Contents
Need help?
Do you have a question about the AD9257 and is the answer not in the manual?