# El perro

Páginas: 5 (1170 palabras) Publicado: 23 de noviembre de 2011
PRACTICA NO.4
OSILOSCOPIO MANAGEMENT.
THEORETICAL INTRODUCTION.
An oscilloscope is an electronic measuring instrument for the graphic representation of electrical signals that vary over time. It is widely used in electronic signal, often with a spectrum analyzer.

Presents the values ​​of electrical signals in the formof coordinates on a screen, wherenormally the X axis (horizontal) represents time and the Y axis (vertical) represents tensions. The image thus obtained is called the wave form. They often include another entry, called "Z axis" or "When elt cylinder that controls the brightness of the beam, thus highlighting or off certain segments of the trace.
Oscilloscopes, classified according to their inner workings can be either analog or digital, with theresult shown identical in either case, in theory.

DEVELOPMENT OF PRACTICE
MEASUREMENT OF SIGNAL ADJUSTMENT IN THE TERMINAL TEST OSCILLOSCOPE CALIBRATION.
Power up the oscilloscope and locate on the face of it, the calibration test terminal. Connect this terminal to the channel 1 (CH1), a cable for oscilloscope, and then select the trigger source (must be CH1).
Adjust the amplitude control voltage (volts / div) andtime base (time / div) at a scale to properly display a full cycle of calibration test signal. Draw on the graticule shown the resulting signal and report the characteristics of the signal obtained in both amplitude and frequency

CHANNEL 1
Time/Div= 200 Seg/Div
Volts/Div= 100 Volts/Div

CHANNEL 2
Time/Div= 200 Seg/Div
Volts/Div= 100 Volts/Div

The period T is calculated as follows:T = (time / div) X / No horizontal divisions)
For channel 1:
T= 5x200 Seg
For channel 2:
T= 5x200 Seg
The frequency value is calculated as follows: F = 1 / T
For channel 1:
F=1/100 = .001Hz
For channel 2:
F=1/100 = .001Hz
The value of the voltage amplitude peak to peak is calculated as follows:
V = (volts / div) X (No. of vertical divisions)
For channel 1:
V=100 X 5= 500 Vpp
For channel 2:
V=100 X5= 500 Vpp
II.2 .- CHECK SIGNAL GENERATOR OPERATION.

II.2.1 .- Energize the signal generator, connect its output terminal input of the oscilloscope channel 1, for this use your cable BNC-BNC connectors.

Adjust the frequency of the signal generator output to 10KHz and amplitude to 10 Vpp. Select different waveforms that delivers the function generator and complete the followingtable according to the request.

Function | Vpp amplitude (Volts) | Period T (sec) | Period T (sec) | Signal shape (draw) |
Sine | 10v | 5 | 0.2 | |
Triangular | 10v | 5 | 0.2 | |
Square | 10v | 5 | 0.2 | |

II.2.2 .- Select 5Vpp triangular signal at a frequency of 10KHz. Connect the channel 1 input of the oscilloscope, select the link to GND position and verify thatthe trace crossing the center of the graticule of the oscilloscope. As a next step, select the CD coupling position of the instrument. Select the offset voltage generation to draw the oscillograms obtained.

MAXIMUM VOLTAGE C.D. ADDED TO THE SIGNAL
MAX OFFSET = 7.5 VOLTS

C.D. MINIMUM VOLTAGE ADDED TO THE SIGNAL
Min =- 7.5 VOLTS OFFSETII.3 .- The oscilloscope and XY plotter, with CD signal.
Cartesian displacement should be measured electron beam subject to various voltage polarities CD input terminals of the oscilloscope.
Put the oscilloscope in XY mode coupling with the selectors of both channels to the GND (ground). Used X controls and POSICIOÓN X POSICIOÓN Y.  And to put the lines of both channels at the origin (the reference 0Vx, 0Vy), the dot inthe center of the oscilloscope screen.
Subsequently, assemble the circuit shown in the figure below, and with the oscilloscope probes connected the points indicated in each case.  Make the measurements listed below, with the selectors coupling X and Y channels of the oscilloscope in the CD position.  Draw the result of each measurement by placing the corresponding...

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