National Instruments SCXI -1125 用户手册

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Chapter 
4  Theory 
of 
Operation
4-4
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Theory of Parallel Hardware Operation
In parallel mode, the CH0 signal on the rear signal connector is configured 
as the output of the SCXI-1125 analog input channel 0. The rear signal 
connector carries each of the analog outputs of the SCXI-1125 to the 
connected DAQ device. You can use an SCXI-1180 feedthrough connector 
to make each of the outputs available at the front of the chassis; which is 
useful for cascading these signals to other modules for additional signal 
conditioning purposes. Parallel mode allows you to bypass scanning and 
you are not limited by the settling time required by the multiplexer of 
SCXI-1125. You can scan the channels more accurately at a faster rate, 
depending on which E/M Series DAQ device you connect to the module.