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Cheap Chinese 'scope?

Discussion in 'Electronic Design' started by Father Haskell, May 4, 2013.

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  1. Fred Abse

    Fred Abse Guest

  2. "Max voltage: 0---5V"

    Looks like utter and complete garbage, even worse than a cheap sound card
    with a resistor divider (or maybe that's what it really is, plus a total
    bandwidth screw-up). The cheapest sound chip plus an LM139 for the trigger
    could have done better. Definitely not worth buying unless you'd like to
    throw money down the drain.
     
  3. rickman

    rickman Guest

    Anyone have a recommendation for something useful up to 100 MHz at 1 MHz
    prices? lol

    I don't really want a full sized unit on my desk. I want a device that
    uses the PC for display and control. But they aren't so cheap either if
    you find one that seems worthwhile. I see some Hantek units, but as the
    bandwidth goes up the price goes up just as fast! I also can't find
    anyone who has used one of these.

    Is it really that expensive to make a fast front end or are they just
    setting the price according to the functionality? If so, that means
    there isn't enough competition.
     
  4. 0- 3 kHz covers all but the two highest octaves,
    actually. You do lose the higher freq harmonics
    and other nuances that make a sound interesting,
    though. Or the transients that screw it up.
    For Morse code with a log and two rocks, maybe.

    What's the cheapest similar design worth buying?
     
  5. Jasen Betts

    Jasen Betts Guest

  6. rickman

    rickman Guest

    Yeah, but Pico units are really pricey. I forget the details, but I
    think they want $2K for a 300 MHz unit although that may be a 500 MHz BW
    unit and it may include some digital inputs. I just remember I didn't
    go any further than their price page.

    I did a little searching over the last half hour and found a hand held
    unit with the Hantek name on it. I don't see it at the Hantek site, but
    that doesn't surprise me. The DSO1202B claims 200 MHz BW and 1 GHz
    sample rate. The main difference with the DSO1200 seems to be the
    DSO1200 has a 500 MHz sample rate and 32 KSample buffer while the 1202B
    has a 1 MSample buffer.

    I found a couple of reviews on the 1200 where folks seem to recommend a
    Rigol desktop unit over this, but not because they have used it. I
    think a handheld might be a great combination of small size on the desk
    along with full functionality for stand alone operation. It even runs 6
    hours on batteries, well, the 1200 does, I haven't found this spec for
    the 1202B yet.

    I would like digital inputs too, but just haven't found anything decent
    at a "reasonable" price. Obviously if everyone is charging more than I
    want to pay that makes their price UNreasonable... lol
     
  7. hamilton

    hamilton Guest

    100Mhz / 3Khz = 33,333.3333

    So if you buy 33K of these you will have 100Mhz.

    ;-)
     
  8. miso

    miso Guest

    This unit might possibly go down to DC, which most soundcards don't do.
    Still, it is kind of laughable.

    I'm not a fan of blackbox devices in general. You are a slave to the
    drivers and software. I like having a real display, and then the ability
    to feed it to a PC. Based on those cheap Rigols, all they use in China
    is XP. Worse yet, activex.

    There is a hack for the rtlsdr to do direct sampling to around 30MHz. I wouldn't mind setting one up to sample 10.7MHz directly. The rtlsdr
    isn't really a good radio, but if you feed it the 10.7MHz out on some of
    the icoms with wideband 10.7MHz output, you could have a nice panadapter.
     
  9. Sjouke Burry

    Sjouke Burry Guest

    Just download a free Oscilloscope program from the internet.
     
  10. rickman

    rickman Guest

    That isn't a very good oscilloscope for other than audio. No DC and an
    upper frequency of 20 kHz. That doesn't do for most of my work.
     
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