National Instruments NI 9144 User Manual - page 50
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NI 9144 User Guide and Specifications
Table 48.
NI 9218 Scan List Format
Bits
Field
Description
31..22
Reserved
—
21
Offset Cal Enable
Controls the offset calibration mode. Offset
calibration mode disconnects both signal input
pins and forces the channel inputs to zero volts,
enabling measurement of the channel offset
voltage. A logic 1 in any bit enables offset
calibration for the channel, while a logic 0
disables the offset calibration.
20
Shunt Cal Enable
Controls the shunt calibration switch for each of
the two channels. A logic 1 in any bit closes the
switch for the respective channel, while a logic 0
opens the switch.
19..16
Module Mode Setting
Saves the module mode calibration information
for the channel.
15..14
Reserved
—
13
Offset Cal Enable
Controls the offset calibration mode. Offset
calibration mode disconnects both signal input
pins and forces the channel inputs to zero volts,
enabling measurement of the channel offset
voltage. A logic 1 in any bit enables offset
calibration for the channel, while a logic 0
disables the offset calibration.
12
Shunt Cal Enable
Controls the shunt calibration switch for each of
the two channels. A logic 1 in any bit closes the
switch for the respective channel, while a logic 0
opens the switch.
11..8
Module Mode Setting
Saves the module mode calibration information
for the channel.
7
Reserved
6..2
Clock Divisor
The NI 9218 divides the clock source by this
value and uses it as the converters’ oversample
clock. The data rate is equal to 1/256 times this
oversample clock frequency.
1..0
Clock Source
—