Thus we can say for the input signal frequency of 1 GHz only 10 MHz amplifier bandwidth is needed. The frequency of samples in the Sampling Oscilloscope can be as low as one-hundredth of the input signal frequency. The figure below shows the waveforms at the various blocks of the sampling oscilloscope: Thus, the image resolution will be higher. When the size of the steps is smaller, the number of samples will be larger. The size of the steps generated by the staircase generator determines the resolution of the image at the output. This again opens the sampling gate and the cycle is repeated in a similar manner. During comparison when the amplitude of the two signals is equal, it advances the staircase by one step. Here, the ramp signal gets compared with the staircase signal, generated by the staircase generator. The signal generated from the ramp generator is then fed to the voltage comparator unit. Due to which, linear ramp output voltage is produced. When the sampling cycle begins, the oscillator gets activated by the trigger pulses. The vertical amplifier employed in the circuit delays the input signal and after amplification, the signal is given to the vertical plates. It is noteworthy that sampling is to be done in synchronization with the frequency of the applied input signal. When the sampling pulse is provided to the sampling gate, it gets open in order to sample the input waveform. Here, as we can see the input signal is fed into the sampling gate. The figure below shows the block diagram of the sampling oscilloscope: ![]() Block diagram and Working of Sampling Oscilloscope ![]() The thing that is needed to keep in mind that a transient waveform could not be displayed by the sampling technique. A high-frequency waveform is achieved at the output of the oscilloscope as compared to the slope sample rate. It is to be noted here that, before getting displayed, the resultant waveform is amplified with the help of a low bandwidth amplifier. These instruments are used to observe high-frequency signal that lies beyond 50 GHz range. In order to create a waveform around 1000 points are to be needed. ![]() In sampling oscilloscope from various portions of the waveforms, different samples are taken, over consecutive cycles and the overall image is shown on screen as a continuous wave.
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