How to acquire signal at 0.5Hz resolution?

[am_h]

Hi all,

I need to acquire signal from accelerometer at 0.5Hz resolution. I have read in other topic by setting sample rate half of the number samples.

In this case, i have set sampling rate of 2048/sec with number of samples of 4096. This means it will result 2 seconds to fully acquire the samples. I have set loop number to 30 since i need data for 60 seconds. After applying this setting, i still get 1 hz frequency resolution.  How to fix this?

or is there any way to convert 1Hz resolution to 0.5Hz  resolution in Labview?

Thanks

[crossrulz]

I think we would need to see your actual code.  How are you determining what your resolution is?

[altenbach]

Please define your use of the term "resolution". Are you sure that the df of your frequency transform graph is set correctly?

[Henrik_Volkers]

Another information needed is the actual DAQ hardware you are using.

Even if the driver allow you to set ... better to request any samplerate, the driver will fit it to the actual hardware you are using ...

so you can read the fantastic manual ( 😉 ) of your DAQ device and look up the available samplerates.

If you read a periodic signal and want to measure the frequency .. have a look at the extract single tone information vi ... 

If you look at a known signal shape (sine?) you can apply a fit and measure the frequency with a much better uncertainty ...