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EEVblog #1336 – DT71 LCR Tweezer Destructive Teardown + Lab Update

Destructive teardown o nthe Miniware DT71 LCR meter Tweezers Plus a lab move update. Forum: ...


  1. I like the end of the video most.

  2. Well, I’m waiting for the Agilent 900000X with 28 inch “retina” monitor


  3. Agilent also released today a SW upgrade for the 3000X (v2.20) that provides internally generated modulation for wavegen.

    Looks like it’s the same as the 4000X.

  4. I have to say, I don’t understand why O-Scope manufactures don’t spring for nicer screens.

    I hate the idea of paying several thousand dollars for a piece of equipment that feels like it’s UI was contracted out to a Chinese group that makes 50$ ultra-budget tablets.
    I know they don’t get the same economy of scale as consumer electronics, but come on! If I’m going to pay 3 or 4 grand for an O-scope, an extra five hundred bucks for dramatically enhanced usability is totally worth it.

    A 10″ multi-touch capacitive display with a relatively high DPI would be amazing for an O-scope. Heck, they could just glue an Android tablet in there for all I care.
    I have to say the current offerings just seem lazy to me.

    • It’s all because of support. When you have to support the thing for years (decade?) you need to ensure that the parts will be available that long, or a suitable replacement.

      You pay thousands for a scope, and you’d want to use it for say, 10 years. You need to make sure parts for it are available that long, or you’d be replacing it constantly when they need service.

      Consumer electronics? Not so much. If you get the part for 6 months, you buy enough and that’s it. Replacements can be had by cannibalization or spare stock. Because after that, if there’s an extended warranty, you just replace the damn thing and 3 years later, you sell the inventory for those few keeping it going.

      I’m sure you’d be annoyed if your scope only lasted a couple of years before Agilent etc. made you buy new ones because they stopped supporting the old ones and you have to eBay the replacement parts yourself.

      • As an aside, it’s also why car storage is behind – because in the US, all car parts used must be available for 10 years after the car stopped being sold. So all the fancy in-dash nav and entertainment systems need to have parts with long term availability.

    • You know, the more I think about it, the less the 4000X series makes sense because they just seem overpriced compared to the other options.


      DSOX3034A (350MHz 4 channels): ~AU$8500 + GST
      DSOX4034A (350MHz 4 channels): ~AU$11800 + GST
      DSO7034B (350MHz 4 channels): ~AU$10580 + GST

      So the 4000X-series costs MORE than the 7000-series scope? OK, so it has the MegaZoom IV which means faster updates and a bunch of other nice features. But compare the screens; 1024×768 for the 7000-series and 800×600 for the 4000X-series.

      We have an MSOX7034A here at the office and it’s great, especially the screen. In fact it’s the screen which makes it worth the extra money compared to the 3000X-series.

      I guess it’s only a matter of time before the 7000X-series is released with the MegaZoom IV (or MegaZoom V…) and that solves the dilemma but really, 800×600 on a $10k+ scope, I just don’t understand that decision.

      • The screen size (or the wavreform area actually) is possibly a limitation of the Megazoom IV ASIC direct waveform screen mapping. Have a bigger screen and the fixed size small waveform window would look silly?

        • Yes, that definitely is the case, the MegaZoom IV has a limited size window it can write into. BUT there are some things they could have done about it. Perhaps they could have used the ASICs in pairs, each rendering half of a window with twice as much pixels. I think they could have then more easily justified the higher cost of the scope.

          I know why they did what they did but I am just having a hard time seeing where this model fits into the Agilent lineup. It seems like it should fit between the 3000X-series and 7000-series but when you compare the prices, clearly that isn’t the case. It’s more like an alternative to the 7000-series with a faster update rate but lower screen res. It’s a bit weird when a company has products that compete directly with their other product lines though.

  5. Mate, you gave me a bit of a scare there.

    I just bought a 3000X series. Still don’t have it yet.

    Thanks for the heart attack! 😉

  6. I had the chance to try one these babies at the Electronica Munich yesterday. Really nice scope, looks even better than the 6000-series from Rigol.
    I asked why the JTAG decoding was missing and was told that too few people asked for it, yet. But you can get it in the 9000-series (if you happen to have that kind of money lying around). They also said you can upgrade every model to the full 1.5GHz bandwidth by entering a license key.

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