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Displaying the waveformMeasuring Voltages, Time Period and FrequencyUsing cursorsUsing the 'Measure' FunctionTriggeringLAB DATA PAGESection I. MFJ Logic BreadboardSection II. Digital OscilloscopeSection III. Digital MultimeterSection IV. Logic ProbeThere are two prototyping components that will be used to build and test circuits in this lab:Appendix C: Digital Scope Reference Manual (Refer to #numbers on Picture)Edge/Video: Toggle between using and edge trigger and video trigger1 Equipment Familiarization This experiment introduces some of the equipment to be used in the implementation and testing of your ECE 3714 digital circuit designs. This equipment includes: MFJ 5002 Analog/Digital Test Box - To facilitate the interconnection of logic circuits with on-board power, circuit inputs and display outputs. Tektronix TDS 210 Oscilloscope - To allow accurate voltage and current measurements versus time. Digital Multimeter – used for measuring voltage values. Logic Probe – Used for quick sensing logic levels and the presence of pulses. This lab assumes that you have purchased a prototyping breadboard for use with the MFJ 5002 Analog/Digital Test box.You will need to fill out the lab DATA SHEET located at the end of this lab assignment during the performance of the lab. There is NO PRELAB for this assignment.I. MFJ Logic Breadboard………………………………………………………………………………………………………A description of the MFJ 5002 Analog/Digital test box is provided in at the end of this document.Please read over this material before proceeding.A. Read the material describing the test box (at end of this lab).1EE 3714 Equipment Familiarization B. Plug the testbox in and turn the power on.C. Verify that all LEDs work properly by connecting each to the +5V supply and noting that each LED comes on (use the wires from your prototyping kit).D. Connect each LED to the GND pin to verify that all LEDs stay off when connected to ground.E. Check the operation of all data switches by connecting each to a data indicator and noting which switch position is required to turn the LED on or off.F. Verify the 5-pin commonality provided on the breadboard by connecting the +5Vsupply to one pin of the set and connecting one of the common pins to a data indicator. Repeat the connection to the LED from all of the other common pins inthe set.G. Verify the long row commonality provided on the breadboard in the same way as in part F for several pins along the row.II. Digital OscilloscopeThe Tektronix Digital Oscilloscope (TDS 210) is very useful for displaying waveforms, and measuring voltages and time characteristics of waveforms. This walkthrough is aimed to get you through displaying a waveform with the oscilloscope and measuring basic quantities of the waveform like voltage and frequency.Refer to the picture below when performing the following exercises.Displaying the waveform2EE 3714 Equipment Familiarization 1. Hook both the Channel 1 and Channel 2 probes to the clock output of the MFJ-5002 breadboard (you can get scope probes from the back of the room). Use the DIGITAL clock output (in lower left hand portion of the test block – slider switch with three positions). Read the material in Appendix B if you do not know what aclock signal represents.2. Set the clock output of the breadboard to 1Mhz.3. Connect the ground clips of the two oscilloscope probes to the COM output of thebreadboard. The ground clips of the oscilloscope probe are the alligator clips connected to the probes.4. Power up the oscilloscope and breadboard if they are not powered up yet.5. Depending on the current oscilloscope settings, you may or may not see two clear waveforms on the oscilloscope screen.6. Press the AUTOSET button (button #27) on the oscilloscope. The AUTOSET button will automatically adjust the display settings of the oscilloscope to give you a readable waveform. After a few seconds, you should be able to see two square waveforms on the oscilloscope screen. If you see only one waveform, or none at all, press the CH1 Menu or CH2 Menu buttons (buttons #16 and #17) a couple of times until both waveforms show up, then press the AUTOSET button again.Pressing the Channel1 Menu and Channel2 Menu buttons will show or hide the corresponding waveforms.7. Turn the Channel 1 VOLTS/DIV knob a few times. This knob changes the scale factor for viewing the channel 1 waveform. As you turn the knob, notice how the waveform is scaled taller or shorter accordingly. Knob #15 does the same for the channel 2 waveform.8. Turn the SEC/DIV knob (knob #21). This changes the time-base for the waveforms. As the time-base is reduced, the waveforms will be 'compressed', and vice versa. The next few steps will show this in more detail.9. On the breadboard, switch from the 1MHz clock to the 1kHz clock. You will see that the oscilloscope display has changed. 10. Turn the sec/div knob counterclockwise until you can see the waveform repeat itself a few times.11. Press AUTOSET. As you can see, the AUTOSET button again sets the time-base and volts/division settings to display a readable waveform.3EE 3714 Equipment Familiarization Measuring Voltages, Time Period and FrequencyUsing cursors12. Press the CURSOR button (button #5). The cursor menu will display on the oscilloscope screen.13. Set the measurement type to 'voltage'. Do this by pressing button #7 until 'voltage'shows in the first menu slot.14. Change the cursor source to Channel 1 by pressing button #8 until CH1 appears inthe second menu slot. This ensures that any measurement displays are based on the channel 1 waveform.15. Use knob #12 and knob #13 to set the position of the two cursor lines. Set cursor 1 and cursor 2 at the low and high voltage levels of the channel 1 waveform respectively.16. Now, observe that the Cursor1 menu slot displays '-2.5V' while the Cursor2 menu slot displays '2.5V'. (your numbers may differ a bit). Also note that the Delta slot displays '5V'. The Cursor1 and Cursor2 slots display the position of the cursors, while the Delta slot displays the voltage difference between cursor 1 and cursor 2.17. Now we will measure the frequency of the waveform. Set the cursor type to 'time' by pressing button #7 until 'time' shows up in slot 1. Note that the cursors have changed to vertical lines.18. Place cursor 1 at the first rising edge of waveform 1, and place cursor 2 at the second rising edge of waveform 1.19.


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