Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
You can sample at whatever rate you want. Generally you want to be sampling faster than your source, so just keep it at 1 kHz.
The sample rate is how fast the DAQ device records the input voltage. The low-pass rate is the fastest sine wave that will be transmitted through the amplifier. Though both are in Hz you can't directly compare the two.
If you sample a 53 Hz sine wave at 53 Hz you'll just see a row of constant points! If you want to see a nice smooth sine wave, sample at 10x or 100x the wave frequency. At 1000 Hz sample rate, you'll get 18 points per wave, which should be plenty.
Hi Yum,
@Pukhtun_Yum wrote:
And what about the number of samples ? If input analogue signal peaks at 53 Hz and the sampling rate of DAQ is 1k Hz then how much should be the number of samples ?
You define number of samples according to your requirements!
There is a simple formula describing the relationship: time * samplerate = NumOfSamples
(For continuous reading I advise to read 1/10 the samplerate, so at 1kS/s I would read 100 samples per iteration...)
@Pukhtun_Yum wrote:
What if the number of samples are greater than sampling rate ? How would it effect the measurement ?
Like for example if sampling rate is 1000 and number of samples are 2500
2500 Samples) / (1000 Samples/second) = 2.5 seconds
So it will take 2.5 seconds to take that data.
