Products > Test Equipment
New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
battlecoder:
--- Quote from: ru_tash on September 23, 2023, 07:54:04 am ---
--- Quote from: battlecoder on September 23, 2023, 01:01:14 am ---I was going to do a review of this scope in my blog but I will wait until I get the proper cap to repair the issue. The only 0.1uF 0805 caps I have right now are 50V.
--- End quote ---
it is interesting, how to recognize maximum voltage for smd capacitor?
--- End quote ---
Honestly? In my case that's the rating they had when I bought them. :-DD They all said 50V on the label.
Now, I did try connecting them to 50V and they didn't blow up (just to make sure that they weren't... uh... "accidentally mislabeled" ::) by the store I bought them from )
Rooster Cogburn:
How To Test And Measure The Working Rated Voltage Of A Capacitor. Find Fake Capacitors
I think 100V 0805 MLCC caps are a bit rare, certainly nothing I'd just have lying around.
csuhi17:
Hi.
I finally took the plunge and ordered one. it arrived a few days ago.
I'm not a professional.
I haven't played it much yet, but I'm starting to regret it.
I have an HDS272S to compare it with.
I looked with an FY6800 fig generator.
The measured signal is Adj-Pulse with 10Mhz and 10ns pulse width.
I haven't had much time to test it with other settings.
What stood out to me.
There are times when the trigger fails.
With the same setting, the owon triggers exactly. (bigger horizontal division and narrow pulses were not triggered on the owon, but the fnirsi finds something)
With the 2us setting, there was a 0-2us delay on the trigger.
I haven't managed to prove 120Kpts yet. so far approx.: 5K has been collected as a maximum.
It drains faster than the owon. I had to charge it twice.
Not all parameters can be saved, for example, the trigger type is reset to AUTO.
The trigger level changes if you adjust the voltage resolution.
you can't see the trigger voltage, it doesn't show it.
He often writes nonsense, sometimes he also calculates the frequency.
I think the color temperature is also wrong, the trigger is set to single and the waveform is still multi-colored.
If you set the trigger HF rejection, the field of view decreases vertically. At value 3, you lose 2 squares.
I couldn't find any description or reference to what the levels are.
what frequency range do they cover?
Cursors also work interestingly.
I haven't figured out what exactly the vertical cursor measures.
And with the horizontal cursor in ZOOM mode, you can measure the original signal wave above, not the enlarged wave.
I haven't tried the signal generator part yet, nor the ability to copy the signal.
I managed to order the above-mentioned capacitors from a place here in my country, when they arrive and I replace them, I will write how they are for me, or if the replacement makes any sense.
I don't even trust the 400V protection written on it after this...
in my opinion, I would have done better if I still collected and bought an HDS2202 edition.
Fewer errors, better accuracy and reliable...
I have several Fnirsi products, I am satisfied with them, their oscilloscopes are worthless in my opinion.
Too expensive and faulty.
I also use the 1013D only to measure with it in unknown circuits first, so it's not a bad thing if it burns.
battlecoder:
--- Quote from: csuhi17 on September 23, 2023, 01:00:34 pm ---
I think the color temperature is also wrong, the trigger is set to single and the waveform is still multi-colored.
--- End quote ---
You have a great list of findings there, but this one I find it tragically hilarious. I've seen several reviewers pointing out how cool is that it has temperature-colored waveform, but none of them actually bothered testing if the coloring made any sense. I can verify in fact, that even in single capture you get a multi-colored waveform. If I give it the benefit of the doubt maybe it's always equivalent-time-sampling (i.e: Capturing two or more samples with some delay in between), even when in single capture, which could explain the multi-colors. Another alternative explanation is that the colors are actually BS. :palm:
Rooster Cogburn:
Fake it till you make it, the sale that is!
One date point towards the coloring being real is that I don't recall seeing color grading on truly singular events, like voltage rails coming up during power on.
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