report - Measurements Lab 2: Data Acquisition Lab September...

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Measurements Lab 2: Data Acquisition Lab September 17, 2009 Abstract For this lab, a computer-based program was ran to convert signals, initially analog signals, to a more legible digital reading. The data acquisition board (DAQ), located inside the computer, was used as the source to collect data. A variation of the voltage input was used to control how the sampling rate appeared on the main computer. A function generator was necessary to produce a smooth sinusoidal wave for a section of the lab. The lab’s structure was divided into three sections: basic sampling, signal resolution, and periodic signal sampling. These sections allowed us to analyze the affect of voltage as it relates to sample size and consequently, how the sample size affects the resolution. In the first section, we were directed to retrieve a sample of the voltage signal at an appropriate sampling rate. We set the power supply to some voltage and the results of the sample were very precise with little variance. This section aided us in better understanding the basic concepts that go along with voltage signal. The second section involved signal resolution. We set the power source to an extremely small value that read zero on the digital output. We used the suggested sampling rate for one second using a full-scale range of ±5 volts. We concluded this portion by reducing the range and recording the data. The final division of the lab was the periodic signal sampling. The function generator was used in this section and set to a particular voltage and frequency in order to gather information on the digital appearance of the data. Signals were recorded for both high and low sampling rates. The significance of each section was executed in the results that were produced. All results were in accordance to real world reasonableness. In the first section, the collected data was precise with comparison to the set voltage of the power supply. The results of the signal resolution portion had a similar trend throughout the sample. All results were negative and within proximity to the value of zero. For the last section, the settings were proper and obeyed the law of Nyquist in order to produce fitting graphs. In conclusion, the components of this lab aided us in retrieving data with which we were more equipped to analyze analog signals. The results the lab produced were in direct proportion to the restrictions given to the devices, such as the function generator
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This note was uploaded on 04/23/2010 for the course EML 3303 taught by Professor Basu during the Fall '09 term at University of Central Florida.

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report - Measurements Lab 2: Data Acquisition Lab September...

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