What is the Fieldpoint analog input interchannel skew time?

[DougMoore021555]

I need to know what the interchannel skew is on Fieldpoint analog input modules because I need to aquire samples fairly close in time to one another simily to the typical MIO PC-based card. Also, I am wondering if the aquisitions can be externally triggered.

[Aaron_G]

The FieldPoint IO modules are designed to continually sample all (4/8/16) channels and write the data to shared memory. FieldPoint controllers then read the shared memory and make the data available to the user (serial/ethernet) or controlling program (RT). There are no provisions for external triggering of ADC conversions. Nor are there provisions to prevent the user from oversampling or undersampling the shared memory (e.g. the controller reads the shared memory 5 times in-between the ADC updating a channel). The interchannel skew can be determined by taking the IO Module All Channel Update Rate (e.g. 1.08 seconds for the FP-RTD-122)and dividing it by the total number of channels (e.g. 8 for the FP-RTD-122). Thus, the delay in between any two adjacent channels
is 135 ms for the FP-RTD-122.

Ultimately, FieldPoint was designed for single point measurements and not for waveform or simultaneous measurements. The capability for triggered, simultaneous or deterministically sampled readings is not currently available in the FieldPoint system.

Regards,
Aaron