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| university:courses:electronics:electronics-lab-17 [12 Jul 2019 14:00] – [Activity 17: Delta - Sigma Modulator] Pop Andreea | university:courses:electronics:electronics-lab-17 [23 Aug 2019 13:55] – Antoniu Miclaus | ||
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| =====Hardware Setup:===== | =====Hardware Setup:===== | ||
| - | The digital pulse source from AWG2 should be configured for a frequency of 100 KHz with a 50% duty cycle. The amplitude should be set to 2.5 V with a 2.5 V offset which will produce a 0 to 5 V swing. Waveform generator AWG1 should be set as a sine wave and to a frequency of 1 KHz with an offset of 0.7 volts and a 0 V amplitude for the first measurement. | + | The digital pulse source from AWG2 should be configured for a frequency of 100 KHz with a 50% duty cycle. The amplitude should be set to 5 V peak-to-peak |
| =====Procedure: | =====Procedure: | ||
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| With the above settings save the observed oscilloscope waveforms for both the digital (Dout) and filtered analog output (Aout) as plot number 1 in your lab report. The digital output waveform should be low most of the time with narrow pulses. The reconstructed analog output after the RC low pass filter should have a DC average value approximately the same as the value that the DC offset of the waveform generator is set to. Now set the offset of waveform generator to 2.7 volts. Again save the observed oscilloscope waveforms as plot number 2 in your lab report. The digital output should be high much more of the time and the average value of the analog output should be close to 2.7 volts. | With the above settings save the observed oscilloscope waveforms for both the digital (Dout) and filtered analog output (Aout) as plot number 1 in your lab report. The digital output waveform should be low most of the time with narrow pulses. The reconstructed analog output after the RC low pass filter should have a DC average value approximately the same as the value that the DC offset of the waveform generator is set to. Now set the offset of waveform generator to 2.7 volts. Again save the observed oscilloscope waveforms as plot number 2 in your lab report. The digital output should be high much more of the time and the average value of the analog output should be close to 2.7 volts. | ||
| - | Now set the offset of the waveform generator to 1.75V and the amplitude to 1.6V. Now save the waveforms as plot number 3 in your lab report. Open the spectrum analyzer window. The frequency spectrum of the digital waveform and analog waveforms can now be measured and saved as plot number 4 in your lab report. | + | Now set the offset of the waveform generator to 1.75V and the amplitude to 1.6V peak-to-peak. Now save the waveforms as plot number 3 in your lab report. Open the spectrum analyzer window. The frequency spectrum of the digital waveform and analog waveforms can now be measured and saved as plot number 4 in your lab report. |
| =====Questions: | =====Questions: | ||
university/courses/electronics/electronics-lab-17.txt · Last modified: 09 Jan 2021 01:00 by Robin Getz