This setting is very similar to the timebase setting described above, but instead of stretching the wave along the x-axis, it involves stretching it along the y-axis. The period (and hence the frequency) remain constant because 8 times 500µs still equals 0.004s. If you change the timebase to 500µs (half of what it started at), you should see the waveform now takes 8 squares to complete one full oscillation. This means that the period of the wave is 4ms, or 0.004s, giving a frequency of (1/0.004) = 250Hz. When the oscilloscope is first loaded, this setting is set at 1ms, and shows one complete waveform over 4 squares. This control allows you to adjust the length of time that each square of the grid represents. A gain of 1 will have no effect, a gain of less than 1 will make the signal smaller and a gain of more than 1 will make it larger. This is a number that the incoming signal is multiplied by. Adjust the timebase to a convenient scale allows you to calculate the frequency of your whistle by counting the period of one complete waveform. This is especially usefulīecause you can still adjust the time base and volts per division setting. This tickbox freezes the input allowing you to effectively take a snapshot of what is displayed on the oscilloscope at a given instant in time. Since waveforms come in a wide variety of shapes, amplitudes and frequencies, oscilloscopes need to have a number of controls to adjust the display of the waveform so it can comfortably fit inside the viewport. (Different microphones send different voltages to the computer, so for consistency we have normalised the input so the raw input signal will always be limited to somewhere between -5 and +5 volts.) This will take data from any microphone connected to your computer and display the live audio data. If you are browsing using the latest version of Google Chrome, the input dropdown box allows you to select "live input". (You can also choose to display a square wave.) The frequency of this wave can be adjusted by using the "Input Wave Frequency" slider. The initial signal above is a 200Hz sine wave, which has an amplitude of 5 volts. This allows you to measure properties of the wave, such as amplitude or frequency. Once the necessary performance and functionality of the circuit have been verified, the analysis is available for further investigation as needed. By using the standard SPICE analysis technology, detailed benchmarks and characteristics, such as the passband of a filter or the study of harmonics, can be created. Analyzes such as AC analysis, Fourier analysis, noise analysis, worst-case analysis, Monte Carlo analysis are available. All these options allow a variety of “what-if” scenarios to be played comfortably on the PC.An oscilloscope is a useful tool for anyone working with electrical signals because it provides a visual representation of the signal's shape, or waveform. When the required components have been placed in Multisim and wired, the task is to examine the circuit. The tool offers the possibility, in particular through “virtual instruments,” to investigate circuits based on really quickly and intuitively. For this, measuring instruments such as function generator, 2-channel and 4-channel oscilloscope, multimeter, Bode plotter, spectrum analyzer, current clamps, and much more are available. The virtual measuring instruments offer the possibility to investigate circuits without many configurations – as is usual in reality. With the frequency generator, for example, the input signal of an amplifier circuit could be generated and visualized with the oscilloscope, the output signal. Industrial customers come, for example, from device development, test equipment construction, automotive, research, medical technology, or the military. NI Multisim includes a database of components from leading semiconductor manufacturers such as Analog Devices, National Semiconductor, Linear Tech, and Texas Instruments, and offers mixed-mode simulation. With this feature, both analog and digital components can be simulated in combination. In the first step of the circuit development, it may be useful to evaluate the component behavior, to decide as to which component with its specific characteristics for the respective task is most likely in question. The next logical step in the development of the SPICE simulation was the graphical abstraction for the user. This is where the Multisim development environment comes in. Formerly known as Electronics Workbench, Multisim was acquired by National Instruments in 2005 and has been developed and maintained ever since. Multisim is used in education and teaching, such as universities, colleges, or vocational and technical schools, as well as in research and industrial development for the simulation of circuits of analog and digital technology.
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