Oscilloscopes 2012 ppt

[...]... left ready to start a n o t h e r traverse, usually called a 'trace', 'sweep' or 'scan' As noted above, some oscilloscopes use an LCD display This is a trend w h i c h will continue; in future m o r e and more models, especially portable and h a n d h e l d oscilloscopes and digital storage oscilloscopes, will opt for this display technology Figure 1.3 shows the picture that might appear on the screen... w h o have assisted by providing information on, and pictures of, their products F r o m these, a selection of photographs has been included illustrating real-time oscilloscopes, both storage and non-storage, sampling and digital storage oscilloscopes and their accessories In each case, the caption at least gives brief details of the performance of the instrument, whilst in several cases it has been... make observations For some reason the subject of the design and use of oscilloscopes is generally not called oscilloscopy but oscillography, from oscilloand graphein, to write There are other types of oscilloscope besides those using cathode ray tubes For example, pen recorders, ultra-violet chart recorders and XY plotters are all oscilloscopes or oscillographs of a sort, as indeed is 'Fletcher's Trolley'... use, a n d some guidance on their advantages, limitations and quirks m a y not come amiss And while oscilloscopes using a storage cathode ray tube no longer seem to be available (except on the second user market), one of the major oscilloscope m a n u f a c t u r e r s still produces analogue storage oscilloscopes, using a 'scan converter tube' The principle of operation of these is also t o u c h e... Likewise, in the vertical or Y direction, t h e sensitivity or ' d e f l e c t i o n factor' is 100 V p e r division On oscilloscopes w i t h a 1 3 c m ( S i n c h ) n o m i n a l s c r e e n d i a m e t e r , t h e divisions are c e n t i m e t r e squares H o w e v e r , s o m e oscilloscopes h a v e a s m a l l e r s c r e e n size t h a n this In s u c h cases, graticules with f e w e r c e n t... Calibration Workstation, the model 9500 can calibrate analogue and digital oscilloscopes with bandwidths up to 1.1 GHz Active Head Technology T M delivers calibration waveforms directly to the oscilloscope's input connectors, without the need for connecting leads, for the ultimate in accuracy (reproduced by courtesy of Wavetek Ltd) 16 Oscilloscopes Figure 2.8 The VDS2152 Virtual Digital Scope from CELL,... h a n The basic oscilloscope 17 internal graticule, ensuring freedom from parallax w h e n viewing the trace from any angle The OX71 is only one of the Metrix range of oscilloscopes but it is fairly typical of a wide range of basic oscilloscopes available from a number of manufacturers Some may have one or two facilities not found on the OX71 and vice versa, and like the OX71 most are (within the limits... 1.3 shows the picture that might appear on the screen of an oscilloscope if it were used to display the w a v e f o r m of the 240 V a.c (alternating current) domestic mains electricity supply This 4 Oscilloscopes Figure 1.3 240V a.c mains waveform, displayed at 100 volts per division vertically and 5 milliseconds per division horizontally actually varies b e t w e e n plus a n d m i n u s 340 V, w... ultra-violet chart recorders and XY plotters are all oscilloscopes or oscillographs of a sort, as indeed is 'Fletcher's Trolley' of school physics fame However, this book is concerned mainly with cathode ray oscilloscopes, together with the increasing n u m b e r of similar instruments using LCD (liquid crystal display) technology R e p r e s e n t i n g a v a r y i n g voltage The basic principle of oscillography... pictured above, features 60MHz bandwidth in either mode, a 5.8 ~s risetime and a 200Ms/s single shot sample rate, 10Gs/s effective for repetitive signals (reproduced by courtesy of Fluke Europe BV) 6 Oscilloscopes (Hz is s h o r t for h e r t z a n d m e a n s 'cycles p e r second'); t h u s it takes 20ms to c o m p l e t e e a c h cycle As t h e full t e n squares of t h e graticule r e p r e s e . real-time oscilloscopes 18 4. Accessories 33 5. Using oscilloscopes 52 6. Sampling oscilloscopes 88 7. Digital storage oscilloscopes 115 8. Oscilloscopes. special purposes 149 9. How oscilloscopes work (1): the c.r.t. 176 10. How oscilloscopes work (2): circuitry 188 11. How oscilloscopes work (3): storage