Hey Lav
Here is an tutorial on sampling and Nyquist
<a href="http://zone.ni.com/devzone/cda/tut/p/id/3000"; target="_blank">http://zone.ni.com/devzone/cda/tut/p/id/3000</a>
I think the data you are collecting is expected. You are only collecting 2.5 samples/ Cycle not enough to reconstruct your waveform.
I think you will find your PDA is working as well as a PC Daq when it comes to sampling the signal you are trying to acquire.
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Re: Small periodic errors in DPLLs VCO voltage ... each cycle of your phase estimation having a non-zero, and varying, error due to the sampling not being an integer multiple of your actual rate. ... To correct the problem it should be sufficient to synchronize your sampling to your 'VCO' (it may be less confusing to call it what it is -- a numerically controlled oscillator,... Basically you want to always take an exact integer number of samples per VCO cycle, which will guarantee a residual error that's always zero. ... The other thing, which may result in inefficient code but will be conceptually easier for you and for anyone who has to maintain your code is to take your raw data, do a sample rate conversion on it until you have an integer number of samples per NCO cycle, then use that data to drive your loop. ... (comp.dsp)
Help using Ssoundcard for A/D conversion ... That part works but I am collecting data at 44100 samples/sec. ... "Knowing" I would need a delay I ...Buffer sizes range from 44099 to 1 byte ... Without the delay the sampling time gradually exceeds the wall clock ... (comp.os.linux.hardware)
Re: Which GPS? or Build one? ... put a good external antenna on it and log data for several hours ... Unless it's lots of hours you'd be better random sampling your times, ... because there's a semi-periodic six hourly cycle in location errors... (sci.geo.satellite-nav)
WMI ComAccess Denied Error ... I am using WMI for remote datacollection. ... I am collecting remote asset data in a threaded model.The model is as ... launching each thread per system)in one cycle or two, ... (microsoft.public.win32.programmer.wmi)
WMI Com Access Denied Error ... I am using WMI for remote datacollection. ... I am collecting remote asset data in a threaded model.The model is as ... launching each thread per system)in one cycle or two, ... (microsoft.public.windows.server.sbs)
