Oscilloscope

Setup for Diode Testing in Oscilloscope: Diode Testing in Oscilloscope -The voltage-current characteristics curve of a crystal diode may be observed using the circuit given in Fig. 7.37 (a). In this case the internal sweep is not used. Horizontal deflection is obtained by connecting the 6.3 V source directly to the horizontal input and switching […]

Gear Wheel Method for Frequency Measurement: When a Lissajous figure contains a large number of loops, accurate counting becomes difficult. Figure 7.35 shows a test method that uses a modulated ring pattern in place of the looped figure and permits a higher count. This pattern is also called a Gear wheel or toothed wheel, because

Spot Wheel Method for Frequency Measurement: As the ratio of the two frequencies being compared increases, the Lissajous pattern becomes more complicated and hence more difficult to interpret. In such cases, it is advantageous to use the Spot Wheel Method for Frequency Measurement of display as shown in Fig. 7.34 (a) whereby an intensity modulated

Frequency Measurement by Lissajous Method: The oscilloscope is a sensitive indicator for frequency and phase measurements. This Frequency Measurement by Lissajous Method techniques used are simple and dependable, and measurement may be made at any frequency in the response range of the oscilloscope. One of the quickest methods of determining frequency is by using Lissajous

Digital Readout Oscilloscope: The Digital Readout Oscilloscope instrument has a CRT display and a counter display. The diagram shown is of an instrument where the counter measures the time (Fig. 7.29). The input waveform is sampled and the sampling circuit advances the sam­pling position in fixed increments, a process called strobing. The equivalent time between

Storage Oscilloscope (For VLF Signal): Storage Oscilloscope – Storage targets can be distinguished from standard phosphor targets by their ability to retain a waveform pattern for a long time, independent of phosphor peristence. Two storage techniques are used in oscilloscope CRTs, mesh stor­age and phosphor storage. A mesh-Storage Oscilloscope uses a dielectric material deposited on

What is Sampling Oscilloscope?: An ordinary Sampling Oscilloscope has a B.W. of 10 MHz. The HF performance can be improved by means of sampling the input waveform and reconstructing its shape from the sample, i.e. the signal to be observed is sampled and after a few cycles the sampling point is advanced and another sample

What is Electronic Switch in Oscilloscope?: The electronic switch is a device that enables two signals to be displayed simul­taneously on the screen by a single gun CRT. The basic block diagram of an Electronic Switch Circuit is shown in Fig. 7.22. Each signal is applied to a separate gain control and gate stage. The

Dual Trace Oscilloscope: Figure 7.19 (a) shows a block diagram of Dual Trace Oscilloscope. This CRO has a single electron gun whose electron beam is split into two by an electronic switch. There is one control for focus and another for intensity. Two signals are displayed simultaneously. The signals pass through identical vertical channels or

Dual Beam CRO Block Diagram and Working Principle: Figure 7.18 illustrates a block diagram of a Dual Beam CRO. The dual trace oscilloscope has one cathode ray gun, and an electronic switch which switches two signals to a single vertical amplifier. The dual beam oscilloscope uses two completely separate electron beams, two sets of VDPs