Hi St Augustine, This issue could occur if you are sampling on 2 or more channels. If this is the case, you are probably seeing cross-talk (channel ghosting) where voltages on previous channels are being seen on subsequent channels in your sample list. For example, if you have a sinewave on the first channel and 5V on the second channel, you might see remnants of each channel on the other, distorting your signal slightly. The best way to correct this is to increase the interchannel delay.
Data Acquisition: Troubleshooting Unexpected Voltages or Cross-talk in Analog Input Channels http://digital.ni.com/public.nsf/websearch/B9BCDFD960C06B9186256A37007490CD?OpenDocument If you are only sampling on one channel, you could check in Measurement & Automation Explorer (MAX) to make sure that you are seeing the same phenomenon being exhibited by the waveform. In MAX, you can right-click your PCI-6014 device and select Test Panels. Then you can adjust the sampling rate and watch the waveform directly from the front end of the driver. Another point is that it could still be that you are seeing granularity because of the high frequency of your signal relative to your sampling rate. A sampling rate of 8x higher will still look much more "squarish" then a sampling rate 100x faster. Anyway, hope that helps. Have a good day. Ron
