In an effort to get the h1oaf0 to run reliably, Fil and I replaced the I/O chassis with the x1psl0 chassis from the DAQ test stand, which has been the most reliable.  

We used the same ADC/DAC/BIO cards as were in the original h1oaf0 I/O chassis.

The ADC/DAC failed within 5 minutes.

Next we will try swapping ADC0 and it's interface card.