Ai Sample Clock Signal - National Instruments DAQ X Series User Manual

Chapter 4 Analog Input
The total aggregate determines the maximum bus bandwidth used by the
device. The total aggregate sample rate is the product of the maximum
sample rate for a single channel multiplied by the number of AI channels
that the device support.
Table 4-7 shows the single channels and total aggregate rates for
Simultaneous MIO X Series devices.

AI Sample Clock Signal

Use the AI Sample Clock (ai/SampleClock) signal to initiate a set of
measurements. Your Simultaneous MIO X Series device samples the
AI signals of every channel in the task once for every AI Sample Clock.
A measurement acquisition consists of one or more samples.
You can specify an internal or external source for AI Sample Clock. You
also can specify whether the measurement sample begins on the rising edge
or falling edge of AI Sample Clock.
Using an Internal Source
One of the following internal signals can drive AI Sample Clock:
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X Series User Manual
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Table 4-7. Analog Input Rates for Simultaneous MIO X Series Devices
Simultaneous MIO
X Series Device
NI 6356
NI 6358
NI 6366
NI 6368
Note: On Simultaneous MIO X Series devices, each channel has an ADC so each channel
can be acquired at the maximum single channel rate.
Counter n Internal Output
AI Sample Clock Timebase (divided down)
A pulse initiated by host software
Change Detection Event
Counter n Sample Clock
DI Sample Clock (di/SampleClock)
4-54
Analog Input Rate
Single Channel Total Aggregate
1.25 MS/s 10 MS/s
1.25 MS/s 20 MS/s
2 MS/s 16 MS/s
2 MS/s 32 MS/s
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