<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:18pt"><div>Jim,</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">DAQ Express VI's, or DAQ Assistant or Wizard etc. all use underlying calls to DAQmx VI's. As Nathan mentioned, you can't have two tasks accessing the same hardware resource (i.e. the analog channels). So it won't work, whatever method you choose to use.</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">The reason for this is there is only one
timing engine per channel group. I am assuming you are using hardware timing?</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Sample them all at the higher rate, and then downsample a group of that to your lower sampling rate.</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">It might be possible using software timing (obviously not as repeatable as hardware timing). </div><div
style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Two separate loops with the same task ID, reading all channels at different loop rates. Sorry I don't have any desktop hardware to confirm this.</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent;
font-style: normal;">Neville Dholoo</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Advanced Measurements Inc.</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Calgary AB</div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Canada</div></div></body></html>