unable to display waveform / multiple recording

Question

Dear all,It would be very nice if you could answer some questions to help me with my first steps with High-Speed Digitizers and NI-Scope.Situation:We bought the NI PCI-5122 High-Speed Digitizer to substitute our Tektronix Digital Scope (TDS 3032), which we are currently using for data acquisition via GPIB in our system. We want to operate the digitizer with NI-Scope 2.6 under LabVIEW 6.1 and/or 7.1. To get familiar with NI-Scope I had a look at the examples and wrote a simplified program (please see attached “simple_acquisition.vi”) which is based on the “niScope EX Measurement Library.vi”.Questions:1. If I apply a sinusoidal-function (30Hz, amplitude: 0.8V) to CH0 and run the Scope Soft Front panel (edge trigger), I have no problem to see the function (please see attached screen-shot “Scope Soft Front Panel.doc”).Now, I run the “simple_acquisition.vi” and, I am unable to see the sinusoidal-function on the waveform graph. What am I doing wrong?2. Is the waveform data scaled (the 1-D array), I am acquireing with the “NI Scope INITIATE.vi and NI Scope FETCH WDT.vi”?3. How do I realize SINGLE Sequence operation mode with the digitizer, like we are doing currently with our Tektronix Scope (using an external TTL trigger at 40 Hz)?4. Do I realize averaging by substituting the while-loop with a for-loop and set the iterations to 100 (for an average of 100)?5. How can I create positioning sliders like those in the Scope Soft Front Panel?6. How do I acquire e.g. 100 waveforms subsequently (using an external TTL trigger signal) and than transferring the 100 waveforms as 1-D arrays, one by one, out of the digitizer’s 32 MB onboard memory?In parallel, when the 100 1-D waveform arrays are transferred from the digitizer, I want to feed these 1-D arrays, one by one, through my data-analysis routine to do a fit for each of the 100 waveforms. The fit-results should than be displayed in an 1-D array for further statistical processing.I know that I have to do this in a loop-structure. Can somebody give me some suggestions?Thank you very much for all your help!Kind regards,beam