| Electronics > Projects, Designs, and Technical Stuff |
| Trasistor Cruve tracer + Hameg 1004-3 XY weirdness |
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| AngraMelo:
Hello everyone, I have a Hameg HM1004-3 and just bought and soldered this transistor curve tracer kit:https://www.ebay.com/itm/Transistor-Curve-Tracer-adapter-Oscilloscopes-Plus-Power-supply-UnAssembled-Kit/291531434190?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 On the Hameg manual, it says that Channel 2 is the X and Channel 1 is Y. When i connected the curve tracer that way all I get is a fuzzy picture (like there is no ground connection or something). If I connect it the other way around, making the necessary adjustments of the Volts/Division and triggering I get a clear picture of the curves but the curves are now going vertically. The thing is, the scope seems to be triggering fine on both channels. Trying both channels out with signal sources produced the same image. Ive read the manual over and over and I cant understand what is going on. Any tips? During the 2+ hours I spent trying to figure out what was going on, there was a moment (around 2 seconds) where it briefly worked, the curves where horizontal and I could see them clearly, but then it changed back to the fuzzy mess. Pictures for reference |
| TERRA Operative:
Over in this thread we talk about the fuzzy issue. https://www.eevblog.com/forum/testgear/transistor-curve-tracer-kit-on-ebay/ Basically, don't try using shielded test cables, keep them as short as possible and apart from each other, and put a ferrite bead on all the wires. |
| AngraMelo:
--- Quote from: TERRA Operative on October 14, 2019, 09:50:19 am ---Over in this thread we talk about the fuzzy issue. https://www.eevblog.com/forum/testgear/transistor-curve-tracer-kit-on-ebay/ Basically, don't try using shielded test cables, keep them as short as possible and apart from each other, and put a ferrite bead on all the wires. --- End quote --- Thank you so much!! |
| AngraMelo:
--- Quote from: TERRA Operative on October 14, 2019, 09:50:19 am ---Over in this thread we talk about the fuzzy issue. https://www.eevblog.com/forum/testgear/transistor-curve-tracer-kit-on-ebay/ Basically, don't try using shielded test cables, keep them as short as possible and apart from each other, and put a ferrite bead on all the wires. --- End quote --- Ive tried using EMI beeds, changing the cables to bnc/banana then a alligator clip to the board, but nothing seems to be even a tiny bit better. The crazy thing is, inverting the channels works just fine, but the lines are vertical. So how on earth can I complete distort the signal just by swapping the leads?? |
| AngraMelo:
This situation is truly ridiculous. Here is another picture of the scope measuring channels 1&2 and then "2&1". They look exactly the same, but when you plot the XY one gets distorted the other doesnt. |
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