I have a cRio-9073 with a 9215 and 9401 cartridge. The input is a voltage (to the 9215) and the output is a pulse-width-modulated signal to an RC-servo (by way of 9401). I have a strange problem with this that I cannot figure out: If I run the pulse generation block by itself, the pulses are perfect, and varying with a front panel control works just fine. When I include the AI block, and/or the variable to adjust the pulse width, the output becomes sparatic (verified through ocilliscope). I am not sure if there is a time delay somewhere, or I have something setup wrong. Interestingly, if I change the refresh rate of the AI block to 1 Hz (1000 msec), it works. If I go faster, the output gets garbled.
This does not have to be super fast, 5-10 Hz would be fine, but when I do that, the pulse widths are not consistent. Any ideas?
Rich
