TWT #27: DSO138 How to Use Basics

Hello everyone, on one of my previous videos somebody asked if I could do a basic how to use video for the DSO 138. So that's what I'm going to do today. To start off here, you're going to need a battery or a power supply that is between 8 and 12 volts. JYE tech sells a little converter board a step-up power supply that you can plug a source that's less than 9 volts and will get 9 volts on the output. It is actually designed for attaching to their oscilloscope, I think there are a couple other kits that it is also compatible with. Next up here we have the switches on the left side. This is the coupling switch so this is where you set whether or not you're measuring DC, AC, or if you want to isolate the input completely, you switch it to ground. Then we have 2 sensitivity settings, You have Sense 1 which sets whether it is 1 volt, 0.1 volt or 10 millivolt. Then you have Sense 2 which is the multiplier. These two switches adjust the sensitivity. They change how many volts per division are displayed. Of course, 1 volt times 1 is going to be 1 volt. 1 volt times 2 is going to be 2 volts. 1 volt times 5 will be 5 volts and so on. Then on this side you have the regular buttons. You have the select button. This will select the parameter to be adjusted. You have the okay button which is for confirmation. We have the plus and minus buttons, That adjust the parameter selected by the Select switch. Down here we have the reset button, the reset button cycles the power for the whole DSO. For calibrating this oscilloscope there is a little loop here. It is a 1 kilohertz 3.3 volt signal it is good for adjusting these trimmer capacitors. Adjusting these capacitors helps remove the over and the under spikes. You want a stable waveform like the calibration signal. Then you can adjust these capacitors to make sure that the overshoot and undershoot are as close to non-existent as possible Now that we've taken a look at the hardware we will power it on this will be what it will look like when you first turn it on I reset it to the factory defaults If you do ever need to reset it to the factory defaults you just hold down the plus and the minus buttons at the same time for about two seconds and it resets. Now to make sure that this line here is where it's supposed to be we switch the coupling to ground and we press the select button until we get to the vertical selector and then we hold down the ok button. you can see that just move the trace up to the selector so that lined up the trace and the actual vertical selection. A feature this does have is if you select the trigger. You hold the OK button for 2 seconds it will actually place the trigger into the middle of the waveform that's the auto center for the trigger level. There's not a whole ton of overshoot and there's not a whole ton of undershoot. If you do have big spikes this is where these adjustable capacitors come in. You set the DSO to DC 0.1 volts 5 times multiplier a time base of 0.1 or 0.2 milliseconds and then you adjust those capacitors until you have a fairly smooth level waveform. now with the time base selected what we can also do is we can turn on the readout which you do by just holding down the ok' button for about 2 seconds and then the readout comes up and that's going to show you the v-max the V min the average voltage voltage peak to peak and voltage RMS so on the left here you can see that it tells you the frequency the duty cycle and all of that information when you have the readout on. Now this information basically will only work if you can manage to get a stable triggering waveform If your waveform is jumping all over the place then this side of the information will be useless or will be blank this can still be helpful because it tells you the voltage maximums and all of those good things. The next feature of this oscilloscope is that it has memory. You can save a waveform and in to do that Press the select and the plus button simultaneously. It comes up and says saving and now what we can do is press the Select and minus buttons and you'll see it loaded in the saved waveform. now if you select the horizontal position and you moved it around a bunch and you need to get it back to the center. You can just make sure that the horizontal position indicator is selected and hold down the ok button for two seconds this will reset it back to the center you can see here that the vertical position indicator and the waveform have kind of jumped out of sync they're not lined up so I find it's good practice to in between each reading basically come back to this ground state make sure that the vertical position is selected and then just reset it because it can get a little bit confusing trying to match up the line when it's not directly in line with the indicator. you have three trigger modes. In auto mode the oscilloscope will perform display refreshes whether the trigger happens or not. When a trigger is detected the display will reference the trigger points otherwise it'll just display the waveform at random points. In normal mode the oscilloscope will only perform a display refresh when there are triggers. if no trigger happens the waveform display will just stay frozen. Finally you have single mode which is the same as normal mode, except that the oscilloscope enters a hold state when it detects a trigger. you can set it to trigger either on a falling edge or a rising edge of a waveform. that's pretty much all there is to the oscilloscope. Hopefully this video was helpful or interesting. don't forget to like this video and share it with your friends If you haven't already, please consider subscribing to my channel! every subscriber helps! I make these videos for you all because you're awesome! If you have questions or comments please leave them in the section below or you can email them to me or tweet them to me! Thank you for watching! I hope you have a wonderful day.

Channel: Tinkering With Terrius

Views: 78,246

Keywords: Tinkering With Terrius, TinkerWTerrius, TWT, DSO138, quick guide, quick start, electronics, learning, basics, newbie, walkthrough, how to use the DSO138, how to, overview, JYE Tech, digital oscilloscope, getting started guide, tutorial, How to use, basic guide, using the dso138

Id: rGYiJdSWL7w

Length: 6min 21sec (381 seconds)

Published: Thu Aug 24 2017