Hello,
I have a 9402 DI card I'm using in a 9139 cDAQ. I'd like to take some PWM voltage measurements and do some sort of counter scheme to back out RMS values, harmonics, etc. However, the voltage is (nominally) 220 V (on), and all I have are 100x attenuation probes, knocking my "on" voltage to ~2.2V (well below the "on" level for traditional 5V TTL). Does anyone know if there's a way to adjust the on/off threshold voltage for a 9402 card (or just general LabVIEW tricks with DI/DO)?
Thanks!
I have a 9402 DI card I'm using in a 9139 cDAQ. I'd like to take some PWM voltage measurements and do some sort of counter scheme to back out RMS values, harmonics, etc. However, the voltage is (nominally) 220 V (on), and all I have are 100x attenuation probes, knocking my "on" voltage to ~2.2V (well below the "on" level for traditional 5V TTL). Does anyone know if there's a way to adjust the on/off threshold voltage for a 9402 card (or just general LabVIEW tricks with DI/DO)?
Thanks!