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Basic_Oscilloscope_Report - PHYSICS 211L Exp 1 Basic...

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PHYSICS 211L Exp. 1: Basic Oscilloscope Operations Date: _08/03/2007 _ N AME : _S ARAH K ARAM _ P ARTNER S NAME :_M ELISSA K ANAAN _ S ECTION NUMBER & N AME OF I NSTRUCTOR : _-1- M S . S ARA N AJM _ 1. Data Table 1: Amplitude Measurements Amplitude control Function Generator CH1 VOLTS/DIV (13) Number of divisions Peak to Peak Voltage Fully CW 2 V/div 6.8 div 13.4 V ½- Way CW 2 V/div 3 div 6 V ¼- way CW 2 V/div 2.6 div 5.2 V Fully CCW 0.5 V/div 1.6 div 0.8 V Fully CW Square wave: V p-p = 27 V Fully CW Triangular wave: V p-p =28 V Table 2: Frequency Measurements Set the frequency using the frequency counter (counters are accurate to within about 10 parts per million) Frequency of Function Generator Time/DIV (23) Number of divisions Period Frequency (from scope) % Difference in Frequency 100 Hz 2 ms/div 5 div 10*10 -2 s 100 Hz 0 % 2.00 kHz 0.1 ms/div 5 div 0.5 * 10 -3 s 2000 Hz 0.75 % 40.0 kHz 5 μs/div 4.2 div 21*10 -6 s 47619 Hz 18 % 150 kHz 2 μs/div 2.8 div 5.6 * 10 -6 s 178571 Hz 18 % 1.30 MHz 0.2 μs/div 3.3 div 0.66 * 10 -6 s 1515151 Hz 17 % Comment on the accuracy of the scope measurement. The scope measurements are more or less close to the frequency given by the generator but not very close especially in the case of high frequencies where we noticed a 17-18% difference. Describe what happens when you vary the trigger and when you press the +/-trigger control. What is the use of the trigger on the oscilloscope?
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