supply chain

Topics: Oscilloscope, Voltage, Alternating current Pages: 6 (1052 words) Published: October 6, 2014
Republic of the Philippines
BATANGAS STATE UNIVERSITY
JPLPC- Malvar Campus
Malvar, Batangas

COLLEGE OF ENGINEERING AND COMPUTING SCIENCES

LAB EQUIPMENT FAMILIARIZATION EXP. 1

Submitted to: Ms. Yzle Marie Balita

Submitted by: Jesmar T. Angulo
(IE-411)

Rating:

LAB EQUIPMENT FAMILIARIZATION EXP. 1
Objectives
To be familiar with the main blocks of the oscilloscope and the function of each block. Understand how an oscilloscope works, and how to use the various controls. Generate and explore different waveforms that are commonly used. Compute and measure Vp-p, Vp, Vavg, and Vrms.

Measure the period and frequency of periodic ac signals.
Procedure
Equipment & Part List
1- Oscilloscope 2- Function Generator (FG) or Signal Generator 3- Digital Multimeter (DMM)4- Bread-board
6- Connection Wires and coaxial cable Probes
PART A – Using Oscilloscope and Function Generator
1- Turn on the Oscilloscope, choose CH1 from the Vertical Mode (to display only channel 1 signal). Set the Oscilloscope’s “Volts/Division” knob for “channel 1” to 2V/DIV, and set the sweep “Seconds/Division” knob to 0.2 ms/DIV. 2- Set the coupling switch (AC/DC/GND) to GND and move the trace to the middle of the screen. When you finish set the coupling switch to AC again. 3- Turn on the Function Generator and connect the output of it to the input of CH1 of the Oscilloscope. 4- While observing the signal on the Oscilloscope, turn the amplitude potentiometer knob and the frequency knob of the Function Generator to get 8Vpp, 1 kHz on the Oscilloscope screen. 5- Draw the signal displayed on the Oscilloscope screen.

6- Turn the “Volts/Division” knob for channel 1 in the CW and then CCW directions. How does that affect what you see on the Oscilloscope? Note: Be sure that the VAR knob of the “Volt/Division” and “Second/Division” is locked in the CAL (Calibration) position, so don’t change it. When I turn the ’’Volts/Division ‘’ knob, the signal displayed on the oscilloscope, become faster ,indicate that when you increase the voltage, the movement of the signal becomes fast and when you decrease the voltage the movement of the signal will be slow.

7- Turn the “Seconds/Division” knob for channel 1 in the CW and then CCW directions. How does that affect what you see on the Oscilloscope? When I turn the ‘’Seconds/ Division’’ knob, the signal displayed on the oscilloscope becomes slower, indicate that when you increase the time, the signal movement of the signal become slow, then when you decrease the time, the movement of the signal become fast.

14- How many screen divisions of the Oscilloscope:
1) Horizontally: . . . . . . . . . . .
The screen division of an oscilloscope approximately has 10 squares/ division on the horizontal axis. 2) Vertically: . . . . . . . . . . . . .
The screen division of an oscilloscope approximately has 8 squares/ division on the vertical axis. 3) Subdivisions: . . . . . . . . . .
The screen division of an oscilloscope approximately has 50x40 subdivisions.

PART B - Measuring Time, Frequency and Amplitude
1- Connect the output of a Function Generator to the CH1 input on the Oscilloscope. 2- Set the sine waveforms listed in Table 1, using the Oscilloscope and DMM to complete the rest of the table. 3- Sketch the waveforms on the respective screen grid provided. Record the HORZ. and VERT. settings. Note: Practically DMM’s are used to measure the Effective Voltage (Vrms) and the average Voltage (Vavg). Such that: Vrms = VAC (only for pure sine wave)

Vavg = VDC
Table 1
Freq. and Amplitude
Vrms (V)
Vavg (V)
f = 500 Hz @ 800 mV pp
565.685mV
254.648mV
f = 10 kHz @ 10Vpp
7.071V
3.184V

4- For a sine wave of 250 kHz, what is the “Second/Division” needed to display 2.5...
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