Tektronix oscilloscope is a multi-functional electronic measuring instrument, which is widely used in electronic engineering, communication engineering, automation control and other fields. When using a Tektronix oscilloscope, adjusting the trigger frequency is an important operation. This article will introduce you to the method of adjusting the trigger frequency of a Tektronix oscilloscope and what it does.
First, we need to understand the triggering capabilities of Tektronix oscilloscopes. Triggering refers to the selection of a specific level or edge in the input signal that enables the oscilloscope to stably display the waveform of a periodic signal. By adjusting the trigger frequency, we can ensure that the waveform is stable on the oscilloscope screen, allowing us to make accurate measurements and analysis.
There are several steps to adjust the trigger frequency of a Tektronix oscilloscope:
1.First, set the oscilloscope's trigger source to an external trigger or signal source. External triggering refers to the use of an external signal as the trigger source, which is the signal generated by the oscilloscope internally.
2.Then, select the appropriate trigger mode. Tektronix oscilloscopes typically offer both edge trigger and pulse width trigger modes. Edge triggering refers to selecting the rising or falling edge of the signal as the trigger condition, while pulse width triggering refers to selecting the pulse width of the signal as the trigger condition. Select the appropriate trigger mode according to your needs.
3.Next, adjust the trigger level. The trigger level refers to the level threshold of the trigger signal. By adjusting the trigger level, we can determine the starting position of the trigger signal, so that the waveform is displayed steadily on the screen. In general, the trigger level should be selected in the appropriate position before the rising or falling edge of the signal.
4.Finally, adjust the trigger frequency. The trigger frequency is the repetition rate of the trigger signal of the oscilloscope. By adjusting the trigger frequency, we can change the horizontal position of the waveform on the oscilloscope screen. If the trigger frequency is too high, the waveform may move rapidly across the screen, making it difficult to observe and measureIf the trigger frequency is too low, the waveform may freeze on the screen and cannot be displayed.
When adjusting the trigger frequency, we can choose the appropriate trigger frequency according to the frequency of the signal. In general, the trigger frequency should be greater than twice the signal frequency to ensure that the waveform can be displayed stably on the screen.
In addition to the above basic steps, some Tektronix oscilloscopes also offer automatic triggering. The auto-trigger function can automatically adjust the trigger frequency and level according to the characteristics of the input signal, allowing the oscilloscope to quickly capture the waveform and stabilize the display.
In summary, adjusting the trigger frequency of your Tektronix oscilloscope is an important step in ensuring that the waveform is stable on the screen. By selecting the appropriate trigger source, trigger mode, trigger level, and trigger frequency, we can obtain clear and accurate waveforms for signal analysis and troubleshooting.