1. 

 a) On page 113 (posted), the amplitude of the signal as measured on the oscilloscope and the DMM did not agree. Do you have any suggestions as to why this was so?

 b) Which do you believe was the more accurate measurement, the DMM, or, the Oscilloscope? Explain why you believe that that one is the better one.

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For the experts!!!! Do part IIl if time permits. II. Reconnect the function generator and oscilloscope clips so that the functiom generator's output is displayed on the oscilloscope. Your instructor will now reset the settings on the function generator to an unknown setting of frequency and signal amplitude. Function generator Function generator setting fixed by the instructor: Dial Range: AMPL setting (fraction of rotation, e.g., 1/3rd turn clockwise) : Use a DMM to measure the function generator's signal amplitude: Vusu AC Estimate of the frequency (based on the function generator's dial and Range settings Hz Oscilloscope Amplitude: Number of divisions (to the ncarest tenth of a cm) cm Volt/Div setting on the oscilloscope CH I V AC Calculated amplitude of the displayed signal: VAC Frequency: Number of divisions of 1 cycle (to the nearest tenth of a cm) cm Time/Div setting on the oscilloscope CH 1 Calculated period of the displayed signal: T- Calculated frequency based on the period: r- Hz How does your frequency determination's compare with the frequency estimate? They should be within 10%. How does your amplitude determination on the oscilloscope compare with the Voso measurement? Note: The two may be not close, maybe not even within 20 %. Do you have any ideas why these two may not be closer? Give it some thought and maybe even doo a search on the internet. If you were to chose which is the most accurate measuring device for the amplitude of altemating voltages, which one would you use, the DMM, or, the Oscilloscope. Check your results with your instructor. Your Instructor will put his/her signature to validate your answer is correct: Disconnect the oscilloscope from the function generator and the oscilloscope connections. Tum off the oscilloscope and the Function Generator. Disconnect the leads and set them neatly aside. Instructor's signature: Date: 113 For the experts!!!! Do part IIl if time permits. II. Reconnect the function generator and oscilloscope clips so that the functiom generator's output is displayed on the oscilloscope. Your instructor will now reset the settings on the function generator to an unknown setting of frequency and signal amplitude. Function generator Function generator setting fixed by the instructor: Dial Range: AMPL setting (fraction of rotation, e.g., 1/3rd turn clockwise) : Use a DMM to measure the function generator's signal amplitude: Vusu AC Estimate of the frequency (based on the function generator's dial and Range settings Hz Oscilloscope Amplitude: Number of divisions (to the ncarest tenth of a cm) cm Volt/Div setting on the oscilloscope CH I V AC Calculated amplitude of the displayed signal: VAC Frequency: Number of divisions of 1 cycle (to the nearest tenth of a cm) cm Time/Div setting on the oscilloscope CH 1 Calculated period of the displayed signal: T- Calculated frequency based on the period: r- Hz How does your frequency determination's compare with the frequency estimate? They should be within 10%. How does your amplitude determination on the oscilloscope compare with the Voso measurement? Note: The two may be not close, maybe not even within 20 %. Do you have any ideas why these two may not be closer? Give it some thought and maybe even doo a search on the internet. If you were to chose which is the most accurate measuring device for the amplitude of altemating voltages, which one would you use, the DMM, or, the Oscilloscope. Check your results with your instructor. Your Instructor will put his/her signature to validate your answer is correct: Disconnect the oscilloscope from the function generator and the oscilloscope connections. Tum off the oscilloscope and the Function Generator. Disconnect the leads and set them neatly aside. Instructor's signature: Date: 113

Answer rating: 100% (QA)

a b Oscilloscope is very useful when it comes to electronics when you are ... View the full answer