Abstract Lab 1

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  • Topic: Root mean square, Hertz, Wavelength
  • Pages : 2 (525 words )
  • Download(s) : 66
  • Published : February 7, 2013
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Abstract
The overall objective of this lab was to a digital oscilloscope to measure various signals. The goal of Part 1 was to measure the mean value, the frequency, peak to peak voltage, and the RMS voltage of a triangular input signal. To meet this goal, a function generator was used to generate a 1 kHz triangular wave signal with a 1 V amplitude, and the oscilloscope was used to measure the values of that signal. Using the oscilloscope, the mean value was found to be -37.6 mV, the RMS Voltage was 292 mV, the frequency was 1 kHz and the Peak to Peak voltage was 1.01 V. The values observed, differed from what was expected as a result of the inaccuracy to output perfect values. The triangular wave was then given a non-zero DC Offset. The latter change displaced the triangular signal vertically by keeping its initial frequency and Peak to Peak values. Another goal of Part 1 was to determine how AC and DC coupling affects the input signal. This was determined by toggling the input channel from DC to AC coupling. The latter resulted in a vertical shift that filters the DC Offset so that the signal centers vertically on the 0 axis. Part 2 of the lab was to measure the response of an amplifier. To meet this goal, a DC Power supply generated a signal to an amplifier which was measured and compared to the direct DC signal by the oscilloscope. The output of the power supply was varied from -12 V to +12 V in increments of 2V and the direct signal was compared to the amplified signal. It was observed that from an input signal of -12 V to -4 V, the output signal was somewhat constant around -0.750 V. From -4 V to +6 V, the output linearly increased by a factor of K = 1.54, then leveled off to 11.4 V with the inputs from +6 V to +12 V. At the constant outputs, the voltage is said to be saturated, which means that the input does not affect the output. A second goal of Part 2 was to find the resonance frequency of the amplifier. This was done by keeping the function...
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