WHICH INPUT CHANNEL HAS TO BE INITIALIZED , analog input CH or digital input CH for DC VOLTAGE?
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HELLO,
i have DC voltage(2.5V) which i want to plot using NI USB 6255, whether i should use the analog input or digital HW channel has to be initialized.
even if i acquire data from digital i/o channel i will get logic 1 or logic0 so how to obtain the same voltage which i give as input
plz anyone help me
Manjunath
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Pedro Villena
2012-10-10
编辑:Pedro Villena
2012-11-8
If you want to plot the exact voltage in matlab, use an analog input channel. The digital channels are in TTL range voltage (0-5 volts), and if you adquire a signal of 2.5V, you will get a noisy digital signal [0 1].
or
Try to configure the analog channel in Differential Mode. In this mode, you gonna use 2 channels, one for posistive pole, and the other for negative pole.
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