Steps for measuring pulse signals with a multimeter
If it is a simple detection of the presence or absence of pulse signals, or only an empirical value and an imprecise value, it can be achieved using the frequency range of a multimeter.
Pulse signals are basically similar to alternating current pulses, which are positive and negative fixed exchange signals, fixed positive pulse signals, and negative pulse signals. One uses AC gear measurement and the other uses DC gear measurement. The measured values are not accurate. A better meter may have multiple Hz gears, but it is still impossible to measure the signal voltage for small pulse signals.
The digital multimeter cannot measure the voltage of pulse signals, so an oscilloscope or specialized instrument is needed.
Digital meters rely on sampling, and the sampling time is likely to be different from the maximum effective value of the pulse being measured. Unless you can adjust the sampling frequency of the digital meter to be the same as the pulse frequency you are testing, at which point your meter head will display a fixed value, which is the pulse voltage. Next, follow the editor to learn in detail how oscilloscopes measure pulse signals.
How to Measure Pulse Signal (Step Tutorial)
Taking the method of measuring the pulse width (positive) of a 1pps pulse signal with an oscilloscope as an example, the general steps are as follows: select measurement channel 1, connect the 1pps pulse signal, set parameters such as impedance, trigger level, Analog amplitude (vertical axis), and Horizontal time resolution (horizontal axis), and then measure the positive pulse width of the 1pps pulse signal through QuickMeans.
1. Open the oscilloscope, connect the 1pps pulse signal cable to measurement channel 1, light up the oval button of measurement channel 1, click AutoScale, and then set parameters such as impedance, trigger level, Analog vertical axis amplitude, and Horizontal horizontal axis time resolution.
2. Click the second button at the bottom of the screen to set the impedance to 50 Ω.
3. Set the trigger level to 700mV using the Level knob in the Trigger area.
4. Set the vertical axis amplitude to 1v through the first knob in the Analog area.
5. Set the horizontal axis time resolution to 10us using the first knob in the horizontal area, and observe the screen display as a square wave.
6. Click on QuickMeas, select 'Positive Pulse Width', and read the measurement value (average value) as shown in the following figure. The positive pulse width measurement value (average value) of a 1pps pulse signal is 20.140us.
