Familiarize yourself with the instek Oscilloscope by reading

Familiarize yourself with the instek Oscilloscope by reading XYZ\'s of Oscilloscopes, then answer the following questions: What is the first thing you should do after the Oscilloscope has been turned ON? Identify the type of each waveform below: Briefly, how does a digital oscilloscope captures and displays the input waveform? What does the vertical control of a scope do? What are the horizontal display controls used for? What does AC input coupling do? How does it affect an AC waveform with a DC offset? What does the oscilloscope trigger do for the display (think about how the waveform display would appear without the trigger)? The voltage of a sine wave plus a DC offset can be mathematically expressed as v(t) = A + 5sin(omega t) Determine the equation for the RMS value of this voltage in terms of A and B. For a 4 V_pp. 1 kHz sine wave with a 1 V DC offset, calculate the RMS value. What is the voltage ratio that produces half power? For a 0 dB reference, how many dB is half power?

Solution

1. Oscilloscope Turn it on first thing to do,there is a push button at the lower right edge of the screen, It says \"line\" and indicates a\"0\" and a \"1\" setting and apply a signal to the input terminal and oscilloscope more than one signal input choose channel 1.

2. A. Sine wave B.Triangular wave C. Square wave D.Sawtooth wave

3.when we capture input wave form, the digital oscilloscope converts into a digital form. We can capture data using three different capturing modes.The time base setting affects how rapidly data acquired.

Capturing modes: There are three capturing input modes:Sample,Peak Detect, and averge

4. The scope of the vertical control, change the vertical position of waveform by moving them up or down on the display. And to compare data we can align waveform above another , And we can also change the vertical scale of a waveform. The waveform display wil contract or expand about the ground level

5.We can adjust horizental position control to view waveform data vefor the trigger after the trigger.If change horizental position of waveform, we are actually changing the time between the trigger and the center of the display.

6. Ac coupling sends the signal through a high pass filter first to remove any DC compoent, If we have a small AC signa riding on top of a large DC offset. On DC coupoing, it wont easy to display since turning the V/DIV knob will sen the signal off the screen. AC coupling remove the DC offset and center the AC waveforms around 0 then it easier to see.and Dc coupling would have to be used for slow changing signal.

7. When looking at signal with an oscilloscope, we looking at a repeating signal. Triggering allows you to horizontally align repetitions of this signal. The trigger section is devoted to stabilizing and focusing the oscilloscope,For example if the signal to trigger on and start measuring , if our waveform like Periodic , the trigger can be manipulated to keep the display static and unflinching.

The main purpose select trigger source and mode, There are variety of Trigger types which manipulate trigger is activated.

The wave form appear to display without trigger it is an automatic trigger mode, The automatic Trigger mode scope to draw our waveform even if it doesnt trigger.

8. The RMS value for a 1 volt DC signal is 1 volts.The RMS value for a square wave with peak to pek voltage of 4 volts is alos 2 volts. The RMS voltage of the sum of signals is equal to the squre root of the sum of the two rms voltages is square root of(1*1+2*2)=2.23volts

RMS voltage of sine wave is

V=Vdc+0.35*vpp

RMS value of sine ware 0.35*vpp or 0.707*vpeak

V=1+0.35*4

V=2.4volts