Sample Rate

[ajmal]

hi sir;

I have NIDAQ board PCI-6025E and driver version is 6.9.2.I m giving the analog input to daq by field phone line

The frequency of the signals is 800hz if i set the sample rate 128000 sample per second then no data is aquired(i.e no voice is got )

and if  i set the sample rate 16000 sample per second then the correct voice is acquired.I m setting this rate to get voice from 8 Channels.

Please tell is there any problem may occur when the sample rate is high and analog input i  week.Am i saying right or wrong....?

Please tell what daq behaves when analog signals are comming on very low frequency and daq is getting data at very high frequency.

                          thanks

                                       ajmal

[Sean_C.]

Hello Ajmal,

Are you trying to sample at 128,000 S/s on each of the 8 channels?  If so, then you should be generating an error.  The 6025E can sample up to 200,000 S/s for all 8 channels which corresponds to a max sampling rate of 25,000 S/s per channel.  Make sure you are checking for errors in your application.  It is likely that you are not acquiring any data at the faster rate because the program is erroring out.

I hope this helps.  Please let me know if you have any further questions.

Regards,
Sean C.

[ajmal]

hi sir

thanks for replying i m using sample rate 128000 S/s for 8 channels i.e 16000S/s per channel 

                                      bye

                                                      ajmal

[Sean_C.]

Hello Ajmal,

Do you have a small piece of example code that will demonstrate this error?  I would like to try to reproduce on my machine.

Regards,

Sean C.