| Electronics > Beginners |
| Learning oscilloscopes on no budget with a 6022BL - did I buy the wrong scope? |
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| rstofer:
I have used lesser scopes quite successfully. While yours could be defective, it is worth noting that it simply doesn't have much in the way of triggering options. Basically just rising and falling edge and whatever 'alternative' is. I am just guessing that the trigger level is adjustable. Clearly, the trigger point needs to be within the range of the waveform. That you can trigger on the compensation output is worth noting. http://www.hantek.com/en/productdetail_2_153.html |
| rawrs:
Hi guys, Sorry I didn't reply sooner. I've been very sick lately. I think I am asking too much of this thing. I knew it would be simple, just not this simple. I guess the only feature I am absolutely crying out for, is better triggering. Because it seems like all I can get is single shot triggering, and depending on the program I use, I may or may not be able to get rising or falling edge functionality. I'm not sure what the trigger I'd like is, but I'd really like to be able to hold a waveform steady, for example the 1KHz 2vpp square wave signal output. I'd like to be able to have that waveform steady, so I can better adjust it, because it seems like all I can do is just capture the waveform at some point in time, either on the rising or falling edge. Which I'm sure is great for diagnostics, but for things like probe calibration, it's not quite there. As for playing with mobile phone signal generators, I have done this a little bit, but not too much. I will play with it some more today, though, as that might teach me more about scopes. As I'm sure I've demonstrated, I know absolutely nothing about them. And regarding the logic analyzer part, I'm sure I'm just not doing it properly. But I'm honestly not sure what there is to learn, really. Thanks all. Will keep playing and report back as to what I learn. We can all learn together! |
| Brumby:
I have one of those and I set it up with the recommended software from the manufacturer. Triggering options are Auto, Normal and Single shot; positive/negative edge and source from channel 1 or 2. Trigger level is set by sliding the tab to the right of the display window. That's it. I only have it because it came from a member here at a reasonable cost - and it gave me an easy option for a big display (on my 27" monitors) and screen capture. To be honest, it hasn't impressed me all that much, with its little idiosyncrasies. Perhaps I will chase up something better on the software side of things, which may prove to make this box more appealing. However, for what it cost me, it can sit where it is - filling in a gap I made by squiggling some other gear around. I would very sincerely not recommend it for someone wanting to do anything serious with particular triggering requirements. For those jobs, I'll make some space on the bench and pull out a proper scope. |
| rawrs:
Ok, this is weird. So, I can get the thing to behave with a reasonable signal being output from the phone, and it will trigger properly on sine, triangle, and square waves. The square wave I'm particularly impressed with as it's pure garbage, tons of overshoot, ringing, everything. But it is coming from an audio signal, so whatever. Can't seem to get it to like sawtooth, but no big deal. At least I'm further down the road now than I was before. But, it seems that for neither love nor money, can I get it to trigger off the built-in signal output, the basic 1KHz square wave with 2vpp. But it will quite happily do a 2.5KHz to 10KHz (the amplitude decreases from there and it becomes harder for it to trigger properly, but again, reasonable signals ok) wave of the above varieties. I'm going to try other software, but when I set the timebase and the voltage up right, I can get a wave to stay put on the screen, and it's useful. And it's not in single shot mode, it is actually triggering properly. So, I've made progress in my learnding! It seems that the problem is mainly between the oscilloscope and the chair. I still haven't played with the logic analyzer side of things, yet, but I'm happy that, for the first time, I've been able to obtain a useful signal from this thing. Even right there, it's worth the $70 investment. Cheers. |
| MosherIV:
The overshoot and ringing on the square wave may not actually be there. It may be the scope probe is not adjusted correctly, there shoult but a screw head thing somewhere on the probe. The built in signal is there to allow you to adjust the probe, once it is set to give a good clean square wave it should be good for othere signals. I do not know why it does not trigger below 2.5KHz. Or on saw tooth. Glad you are learning. Keep it up. :-+ |
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