Chapter 4 Analog Input
X Series User Manual 4-54 ni.com
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:
•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)
Table 4-7. Analog Input Rates for Simultaneous MIO X Series Devices
Simultaneous MIO
X Series Device
Analog Input Rate
Single Channel Total Aggregate
NI 6356 1.25 MS/s 10 MS/s
NI 6358 1.25 MS/s 20 MS/s
NI 6366 2 MS/s 16 MS/s
NI 6368 2 MS/s 32 MS/s
Note: On Simultaneous MIO X Series devices, each channel has an ADC so each channel
can be acquired at the maximum single channel rate.
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