I understand that the NI PCIe-6321 records digital input at 1000kS/s and analog input at 250kS/s. I'm now trying to make sure I understand how this card works when it's recording since it does not have synchronous recording.
For Example:
If I have 2 analog inputs and 2 digital inputs to this card and I'm using custom software to sample data on all channels at 4kS/s... would it work in the following way?
T0 (0ms) = [Analog_channel#1_value] [0.008ms delay] [Analog_channel#2_value] [.008ms delay] [Digital_channel#1_value] [.002ms delay] [Digital_channel#2_value] [.002ms delay]
[Pause until next sample]
T1 (0.25ms) = [Analog_channel#1_value] [0.008ms delay] [Analog_channel#2_value] [.008ms delay] [Digital_channel#1_value] [.002ms delay] [Digital_channel#2_value] [.002ms delay]
[Pause until next sample]
T2 (0.5ms) = [Analog_channel#1_value] [0.008ms delay] [Analog_channel#2_value] [.008ms delay] [Digital_channel#1_value] [.002ms delay] [Digital_channel#2_value] [.002ms delay]
If we then examine the data timepoints...
Timepoint, Channel, Actual Recording Time (since start)
-------------------------------------------------------
T0, Analog_channel#1_value, 0.000ms
T0, Analog_channel#2_value, 0.008ms
T0, Digital_channel#1_value, 0.016ms
T0, Digital_channel#2_value, 0.018ms
T1, Analog_channel#1_value, 0.250ms
T1, Analog_channel#2_value, 0.258ms
T1, Digital_channel#1_value, 0.266ms
T1, Digital_channel#2_value, 0.268ms
T2, Analog_channel#1_value, 0.500ms
T2, Analog_channel#2_value, 0.508ms
T2, Digital_channel#1_value, 0.516ms
T2, Digital_channel#2_value, 0.518ms
Thank you for any info!
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