Tue 06/02/20 10:26:54 pm
Categories:
Electronics
Some tests of my oscilloscope.
I got a little oscilloscope for use in my edrums and electronics projects. This oscilloscope is really intended as a kit in either of two configurations: full assembly required, or SMD components installed on the board and remaining assembly required. I got the third configuration: fully assembled. This little oscilloscope is partly a toy but it should be good enough for my purposes.
The oscilloscope provides a 1 KHz square wave for testing. So, 1000 waves per second means one wave cycle takes 1 ms to complete. Since this is a square wave, half the cycle is at peak voltage, and the other half of the cycle is at 0 voltage. Therefore we expect a square to occupy half of a 1 ms resolution bin…and it does:
Note the oscilloscope properly measured the frequency as 1.0 KHz as well.
The next test comes from my multimeter which provides a 50 Hz square wave test signal. In this case, 50 waves per second means one wave cycle takes 0.02 seconds, or 20 ms, to complete. Again, half the cycle is at peak voltage and the other half is at 0 voltage so we expect a square to occupy half a bin at 20 ms resolution. It does, though in this case the measured frequency is a bit off from the expected 50 Hz:
Is this a problem with the signal, or a problem with the scope? I’ll follow up with another post if I ever do any more tests.
subscribe via RSS