A general source oscilloscope is a common electronic measuring instrument used to measure and display the waveform of the amplitude of an electrical signal as a function of time. In practical applications, adjusting the frequency of the oscilloscope is a very important step that can help us observe and analyze the signal more accurately.
First, in order to adjust the frequency of a universal source oscilloscope, we need to understand some basic concepts. Frequency refers to the number of periods per unit of time in a signal waveform, and it is usually expressed in hertz (Hz). In an oscilloscope, we can change the frequency by adjusting the trigger level and the trigger source.
The first step in adjusting the frequency is to select the appropriate trigger level. The trigger level is the voltage level at which the oscilloscope begins to plot the waveform. On the panel of an oscilloscope, there will usually be a trigger level adjustment knob. By turning this knob, we can change the value of the trigger level. For different signals, we need to select the appropriate trigger level to ensure that the waveform can be stably displayed on the oscilloscope's screen.
Next, we need to choose the right trigger source. A trigger source is a signal source that an oscilloscope uses to trigger waveform plotting. In general, we can choose a variety of trigger sources such as external signal trigger, channel 1 trigger, channel 2 trigger, etc. Choosing the right trigger source can help us better capture a specific part of the signal.
Once we have selected the appropriate trigger level and trigger source, we can start adjusting the frequency of the source oscilloscope. On the oscilloscope's panel, there will usually be a frequency adjustment knob. By turning this knob, we can change the display frequency of the oscilloscope. When adjusting the frequency, we need to adjust it according to the specific signal characteristics. If the frequency of the signal is high, we can increase the display frequency of the oscilloscope appropriately so that the details of the signal can be better observed. Conversely, if the frequency of the signal is low, we can reduce the display frequency of the oscilloscope appropriately in order to show the periodicity of the signal more clearly.
In addition, adjusting the oscilloscope's time reference is also one way to adjust the frequency. The time datum is the scale that the oscilloscope uses to determine horizontal and vertical scaling. By adjusting the time reference, we can change the temporal resolution of the oscilloscope to better observe changes in the signal. If we want to observe subtle changes in the signal in more detail, we can opt for a smaller time reference; If we only focus on the overall trend of the signal, we can choose a larger timeframe.
To sum up, adjusting the frequency of a universal source oscilloscope is a critical step that can help us observe and analyze the signal more accurately. By selecting the appropriate trigger level and trigger source, as well as adjusting the frequency and time reference, we can adjust the oscilloscope's display frequency and temporal resolution, resulting in a clearer and more accurate waveform display. In practical applications, we need to flexibly adjust the frequency of the oscilloscope according to the specific signal characteristics and observation needs, so as to obtain more valuable signal information.