I'm currently recording data points from an analog accelerometer(PCB 353b33) using a TDS3014B oscilloscope which has a Record Length of 10,000 points at a Sample Rate of 1.25 GSa/s. Since the oscilloscope is a triggered data logging device, it's not capturing the whole cycle of the experiment. I trying to look into analog data loggers that would help in seamless data logging for a minute or more with a good sampling rate that would help me capture data for at least one cycle. Is analog data logger the only option remaining? I'm not sure if an analog data logger would be a good solution for my problem, so if anything else would work for my case please suggest that as well.

  • $\begingroup$ it seems to me that you may not be using the oscilloscope correctly ... what is the slowest time base on the scope? $\endgroup$ – jsotola Apr 4 at 18:40
  • $\begingroup$ @jsotola I've played with different time bases and all of them give 10,000 data points. $\endgroup$ – MajorMajorMajorMajor Apr 5 at 12:00
  • $\begingroup$ ok, is 10,000 sample points some kind of a problem? $\endgroup$ – jsotola Apr 5 at 14:45
  • $\begingroup$ @jsotola 10,000 sample points are not capturing a single cycle Our team wants to capture at least 3 cycles $\endgroup$ – MajorMajorMajorMajor Apr 5 at 15:08
  • $\begingroup$ I think what @jsotola is indicating is that you can take samples over longer periods with the scope even though you are still getting the same number of samples by changing the horizontal time scale. My Tektronix scope for instance can be set at 1ks which means that I can look at a sample set that is 10,000 seconds long. If you need very high signal fidelity, you may need more samples than one per second, but since you aren't very specific about the application, it's hard to make that determination. $\endgroup$ – ScienceGeyser Apr 7 at 21:23

There are many devices that would provide the recordings that you need. National Instruments makes a large number of DAQ devices that can record analog signals with very high fidelity. You could also use products from DATAQ. I would recommend something very cheap like the Adafruit Feather M0 Adalogger for projects that don't require the high precision of NI-DAQ or DATAQ instruments.


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