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University of Portland 

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Oscilloscope - TDS3012B.docx 

Oscilloscope Tutorial 

Tektronix TDS3012B and TDS3012 

 

Figure 1: Oscilloscope with a 10X probe connected to the Probe Comp Terminals 

 

Introduction 

The oscilloscope, which displays voltage versus time, is an indispensable tool for testing and 
troubleshooting circuits and taking electrical measurements.  This tutorial will explain how to set 
up the oscilloscope and take basic measurements. 

 

Getting Started 

Do the following steps to set up the oscilloscope.  

1.

 

Turn on the oscilloscope by pressing the power button located in the lower left-hand 
corner.  Wait for scope to boot-up.  When a message shows up on the screen, press the 
MENU OFF button. 

2.

 

When the oscilloscope powers up, it uses the settings that were in place when it was last 
powered down.  To return the oscilloscope to the factory settings, press the Save/Recall 
button.  Then press the button under the screen labeled Recall Factory Setup.  Next press 
the button on the right of the screen labeled OK Confirm Factory Init.   

Summary of Contents for TDS3012

Page 1: ...and take basic measurements Getting Started Do the following steps to set up the oscilloscope 1 Turn on the oscilloscope by pressing the power button located in the lower left hand corner Wait for sc...

Page 2: ...above in Figure 1 5 If you gently push on the probe tip a hook is exposed that can be connected to a wire Connect the probe tip to the upper Probe Comp terminal see Figure 1 The Probe Comp port gener...

Page 3: ...t of the screen To measure a voltage we can count the number of divisions above or below the ground level and multiply by the volts division value For example in Figure 3 the maximum voltage of the sq...

Page 4: ...s division is updated in the lower left of the screen In order to get an accurate voltage measurement we need to set the vertical scale so that the signal is as big as possible without going off the t...

Page 5: ...nal with both DC and AC parts This is the default mode and is used in most cases AC The AC mode is used for signals that have a small AC signal added to a large DC component and you are only intereste...

Page 6: ...pe to pause the sweep at the left side of the screen until the input voltage crosses a user selected voltage called the trigger level This causes each sweep to start in the same point in the period fo...

Page 7: ...r voltage levels on the oscilloscope Measuring Time Difference As mentioned above one way to measure the time difference is to multiply the number of horizontal divisions by the seconds division value...

Page 8: ...rsors which are sometimes more accurate Activate the horizontal cursors by pressing the cursor button see Figure 15 and then pressing the H Bars button Figure 16 Figure 15 Cursor Button Figure 16 H Ba...

Page 9: ...channel 2 trace on the oscilloscope display Pressing the CH 2 button also causes the Vertical Scale and Position knobs to control the channel 2 trace on the screen instead of the channel 1 trace If y...

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