1. Oscilloscopes: 2 TYPES, ANALOG,DIGITIAL SEE APPENDIX i ANALOG: DIRECTLY APPLIES THE VOLTAGE BEING MEASURED TO AN ELECTRON BEAM WHICH MOVES UP, DOWN AND ACROSS THE CRT SCREEN. DIGITIAL: SAMPLES INPUT WAVEFORM AND USES A TO D CONVERTER TO CHANGE VOTLAGE INTO DIGITAL INFORMATION. DIGITAL OSCOPES HAVE MOSTLY REPLACED ANALOG SCOPES. SMALLER,LIGHT WEIGHT 4 CHANNEL MULTIPLE MENU.

2. LIGHTWEIGT DIGTIAL LCD OSCOPE, GREAT FOR TROUBLESHOOTING IN CRAMPED SPACES

3. Illustration showing the interior of a cathode-ray tube for use in an oscilloscope. Numbers in The picture indicate: 1.Deflection voltage electrodes 2.Electron gun 3.Electron beam 4.Focusing coil 5.Phosphor-coated inner side of the screen MAKE presents: The Oscilloscopehttp://www.youtube.com/watch?v=SxZWcku_Sw0 Old school analog

4. CYCLE P.203: ONE WAVEFORM THAT DOES NOT REPEAT ITSELF ½ CYCLE PERIOD (T) : TIME TO COMPLETE ONE CYCLE.( IN THIS CASE.25 SECONDS).25 S

5. SAME THING

7. FREQUENCY( f ) : # OF CYCLES/SECOND Time (sec) FOR THIS WAVEFORM f = 1 CYCLES/SEC HERTZ: UNIT OF FREQUENCY. FOR THE ABOVE WAVEFORM f = 1 Hz f =1/T OR f =1/λ AMPLITUDE: (a) HEIGTH OF THE WAVEFORM.

8. =1/T = 1/20ms = 1/.002 = 500Hz EXAMPLE: FIND THE FREQUENCY FOR THE WAVE FORM BELOW.

9. ANALOG SCOPES MAKE 2 BASIC MEASUREMENTS, AMPLITUDE AND TIME.

10. TYPICAL WAVEFORMS THAT CAN BE SEEN ON AN OSCOPE

11. TRIGGERING: USES THE SAME TRIGGER POINT ON A CONTINUOUS WAVE FORM TO CREATE A STABLE DISPLAY. You tube: Oscilloscope Tutorial Part 1 - Choosing an oscilloscope http://www.youtube.com/watch?v=qIfo_-d82Co

12. TYPES OF PROBES TIMES ONE PROBE( X1) (SHIELDED WIRE) TIMES TEN PROBE (X10) (LOW CAPACITANCE PROBE)

14. YOU TUBE: Oscilloscope Tutorial Part 2 - Basic usagehttp://www.youtube.com/watch?v=hUIgAu3QQWQ

17. FUNCTION GENERATOR

18. BASIC MEASUREMENTS WITH OSCOPES V PP =# OF VERTICAL DIVISIONS x VOLT/DIVISION T (PW) = # OF HORIZONAL DIVISIONS x SECOND/DIVISION f = 1/T V RMS =V PP/2 X.707 PW: PULSE WITDH NONSINUSOIDAL WAVE FORMS (PULSES) PULSE WIDTH prt PULSE REPETITION TIME (prt) PULSE REPETITION FREQUENCY (prf) prf = 1/prt

19. SCOPE SETTINGS X: SEC/DIV = 0.2 MS/DIV Y:VOLT/DIV = 0.5 V/DIV SET SIG. GEN. TO SAWTOOTH F =1KHz AT 1.7 V p AMPLITUDE FROM SCOPE SCREEN COUNT V p K SHOULD BE 3.4 VERTICAL DIV X 0.5V/DIV Vp K =1.7V V PP =2xV PK =2 X 1.7V=3.4V T = 5 HORZ. DIV X 0.2MS/DIV = 1ms f = 1/T =1/1ms =1KHz.5 1.0 1.5 2.0 FIND Vpp, T,f OF THE DISPLAYED WAVEFORM.2.4.6.8 X Y YOU TUBE: Oscilloscope Tutorial Part 3 - Advanced functionshttp://www.youtube.com/watch?v=g_KuGEh0PyA 3.4

20. FROM SCOPE FIND PW, prt, V pk SET SIG. GEN. TO SQUARE WAVE AMPLITUDE = 20V F = 125 KHz SCOPE SETTING X: SEC/DIV = 1us/DIV Y: V/DIV = 5V/DIV PW = 4 HORZ. DIV X 1us/DIV = 4us prt = 9.6 HORZ. DIV X 1us/DIV = 8us us 1234 5 10 15 20 YOU CAN CONFIRM THIS RESULT

21. LISSAJOUS PATTERNS ARE MADE BY APPLYING TWO AC SIGNALS TO THE HORZ. AND VERT. INPUTS OF AN OSCOPE AT THE SAME TIME. SET THE TIME DIVISION SWITCH TO X/Y POSITION ON THE OSCOPE WITH THE TWO FUNCTION GENERATORS SET TO THE SAME FREQUENCY, A CIRCLE SHOULD APPEAR ON YOUR OSCOPE. 1:1 YOU TUBE: Function Generator Tutorial http://www.youtube.com/watch?v=mLKPwWGBtIw WITH 1FUNCTION GENERATOR WITH 2 FUNCTION GENERATORS

22. Basics of Lissajous Patterns on an Oscilloscopehttp://www.youtube.com/watch?v=t6nGiBzGLD8 http://www.youtube.com/watch?v=U8bXpzppdR0 Oscilloscope for iPad, iPhone and iPod touch

23. FREQUENCY RATIO