T/T * 360 = (181.726 ms -181.692 ms) / 1 ms * 360 = 12.24 0Ĭompare the two methods for measuring frequency and phase shift.Ĭompare the voltage set in III.A.2 and obtained in III.A.3 and explain the difference. Oscilloscope (Use Means and Phase bottoms) for each of the following RCġ000 Ohms. Method, (b) the reciprocal time-interval method, and (c) read it accurately off the Using the circuit shown with voltage source set as 1000 Hz, measure the phase-shift angleīetween the voltage across R and the source voltage V using (a) the Lissajous-pattern The vertical input and sketch the Lissajous patterns.Ĭ. Line frequency as a reference applied to the horizontal input. Calibrate an audio oscillator using the method of the Lissajous pattern. Plates if the frequency applied to the horizontal plate is 300 Hz.įvertical = 100 Hz FREQUENCIES AND MESURING PHASE ANGLEī. Given the following Lissajous pattern: Find the frequency of the signal applied to the vertical Therefore, period is 10 times 1000 μ sec which is 0.01 sec.ī. The frequency of V 2 is equal to 1 / T and period is 10 cm given 1000 μ sec/cm. We will use a scale of 200 us /Div in Time and a scale of 2 V /Div for a better comprehensionĬhange Y/T to B/A and vice versa for corresponding measurement. Values, we will collect data and applying Lissajous and reciprocal time-interval methods, we We will calibrate and design the circuit with Multisim. Website to graph the figure with the previous values obtain with Lissajous pattern method. We will apply the Lissajous pattern method to obtain the figure. Time Base Method Lissajous Method Phase difference = t / T * 360 Θ = arcsin A/B = arcsin Y/X We will apply these formulas to calculate the required values to complete the lab report. Reciprocal Time interval method Lissajous Figure method f=1/T fvertical/fhorizontalĪlso, we can calculate phase-shift with Time-base Interval and Lissajous pattern method. Lissajous Figure method calculated the missing frequency with a known frequency. Points on consecutive cycles of the wave and the result power by -1. Reciprocal Time interval method is when we measure the time interval between two Reciprocal Time Interval and Lissajous Figure are the two methods to calculateįrequency. Methods to obtain the frequency and two methods to obtain the phase-shift. Knowing how to analyze the data, we will apply two The data will be collected with an instrument calledĬathode-ray oscilloscope or “scope”. Phase shift in different types of circuits. It is very important to know how to obtain measurements of frequency, voltage, time and THE CATHODE-RAY OSCILLOSCOPE LISSAJOUS PATTERNS FOR COMPARINGįriday 11:30am- 2:15pm FREQUENCIES AND MESURING PHASE ANGLEĪbstract.

Lissajous figures desmos