20.309:DAQ System
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Revision as of 20:13, 19 October 2010 by Steven Nagle (Talk | contribs)
Each lab PC is equipped with a National Instruments USB-6212 data acquisition (DAQ) card.
The USB-6212 has 16, 16-bit analog input channels which can, in sum total, accomplish 400 thousand samples per second (400kS/s). That is, if there are two channels, each one will be alternately sampled, and EACH sampled at 200kS/s. A multiplexer sequentially selects from among the 16 single-ended and 8 differential input signals. The card also supports two 16 bit analog output channels with an update rate of 250 kS/s and an output range of +/- 10 V and up to +/- 2 mA.
Finally, the USB-6212 has 32 digital input/output channels and a digital ground. A 50 kOhm pull-down resistor is typically used in series with connections to these channels.
