National Instruments 3.21E+04 用户手册
Chapter 3 Hardware Overview
National Instruments Corporation
3-9
AT-MIO/AI E Series User Manual
♦
AT-MIO-16XE-10, AT-AI-16XE-10, AT-MIO-16XE-50
These boards have two input polarities—unipolar and bipolar.
Unipolar input means that the input voltage range is between 0 and
V
Unipolar input means that the input voltage range is between 0 and
V
ref
, where V
ref
is a positive reference voltage. Bipolar input
means that the input voltage range is between -V
ref
and +V
ref
. The
AT-MIO-16XE-10, AT-AI-16XE-10, and AT-MIO-16XE-50 have
a unipolar input range of 10 V (0 to 10 V) and a bipolar input range
of 20 V (
a unipolar input range of 10 V (0 to 10 V) and a bipolar input range
of 20 V (
±
10 V). You can program polarity and range settings on
a per channel basis so that you can configure each input channel
uniquely.
uniquely.
Note:
You can calibrate your AT-MIO-16XE-10, AT-AI-16XE-10, and
AT-MIO-16XE-50 analog input circuitry for either a unipolar or bipolar
polarity. If you mix unipolar and bipolar channels in your scan list and you
are using NI-DAQ, then NI-DAQ will load the calibration constants
appropriate to the polarity for which analog input channel 0 is configured.
AT-MIO-16XE-50 analog input circuitry for either a unipolar or bipolar
polarity. If you mix unipolar and bipolar channels in your scan list and you
are using NI-DAQ, then NI-DAQ will load the calibration constants
appropriate to the polarity for which analog input channel 0 is configured.
The software-programmable gain on these boards increases their
overall flexibility by matching the input signal ranges to those that
the ADC can accommodate. The AT-MIO-16XE-10 and
AT-AI-16XE-10 have gains of 1, 2, 5, 10, 20, 50, and 100 and the
AT-MIO-16XE-50 has gains of 1, 2, 10, and 100. These gains are
suited for a wide variety of signal levels. With the proper gain
setting, you can use the full resolution of the ADC to measure the
input signal. Table 3-3 shows the overall input range and precision
according to the input range configuration and gain used.
overall flexibility by matching the input signal ranges to those that
the ADC can accommodate. The AT-MIO-16XE-10 and
AT-AI-16XE-10 have gains of 1, 2, 5, 10, 20, 50, and 100 and the
AT-MIO-16XE-50 has gains of 1, 2, 10, and 100. These gains are
suited for a wide variety of signal levels. With the proper gain
setting, you can use the full resolution of the ADC to measure the
input signal. Table 3-3 shows the overall input range and precision
according to the input range configuration and gain used.