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MSO5000 Bode Plot Capability: Is it Good Enough? [Many tips about a 1st scope]

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balnazzar:

--- Quote from: tautech on October 08, 2022, 04:04:58 am ---
--- Quote from: balnazzar on October 08, 2022, 02:02:14 am ---
--- Quote from: JeremyC on October 08, 2022, 01:37:09 am ---I never owned the SDS1104X-E, but I got chance to play with it - from my point of view it's the best what you can get in $500 range,
without mentoring easy upgrade to 1204X-E.
I'm guessing you did receive an defective, or returned unit (missing screen protection?) ...
You should contact the vendor (Amazon?) and request replacement.

--- End quote ---

Yep, one reason I bought on Amazon are the super easy returns.. Although I still have to clarify if Siglent ships its scopes with a protective film or if such an acoustic noise is kind of normal... Mine could actually be a defective unit that someone else actually returned for the same reasons..

--- End quote ---
More important than quality local support ?
Yeah right.  ::)

--- End quote ---

The thing is that I cannot know the quality of the local support. It could be the worst support one can imagine. That's one reason.
The other is that buying from the distributor I would have had to ship the product back under my responsibility (if the courier breaks it, you have to initiate a lawsuit against it, or a long bureaucratic procedure even if it's insured). With Amazon, once you give the product back to the courier, you have no resposibility. That's the second reason.
Third, you have to pay the expenses for shipping it back. Possibly insured for >500eur, it's expensive. With Amazon, no expenses at all.
Fourth, if that 'quality local distributor' is nasty, it can appeal to a thousand reasons for delaying the refund. Or not refunding at all on grounds that you did not package the product well. You are back to a lawsuit against them. Amazon refunds you even if you put a brick into the box (ok, hyperbole, but you get it).

So, yes. It's more important that an allegedly 'quality' local support.

baldurn:
I do not remember the noise to be that bad. But that may also be because I have used the instrument in an environment where there will be other sounds at all times.

I do think many instruments are louder than they need to be. It is apparently not something manufactures want to spent the last cent on improving. So I suggest you would be best served by expecting that a fan change would be needed in many cases.

As to the warranty, I think EU laws specify they would need to honor that unless they can show that your modification is the reason for the failure. For example they could claim your new fan provided insufficient cooling. But only if the failure was something that could be caused by insufficient cooling. I would not worry too much in this case because it is a relatively inexpensive device.

balnazzar:

--- Quote from: baldurn on October 08, 2022, 06:09:51 pm ---I do think many instruments are louder than they need to be. It is apparently not something manufactures want to spent the last cent on improving. So I suggest you would be best served by expecting that a fan change would be needed in many cases.

--- End quote ---

It depends upon the manufacturer: https://youtu.be/b-TuDm92cn4?t=203

And about the MSO5000: https://youtu.be/P5faiEUXbGg?t=1412

Bottom line: chinese scopes tend to be noisy (and in the case of the MSO5K, not only acoustically...). That's what I don't like about chinese products in general. They tend to deliver stuff that works, but they are always kind of half-finished. How much more would cost to be a bit more attentive to the acoustical noise? Almost nothing. A better fan, PWM control, maybe make the scope 1 cm thicker and put a 120mm fan on the back, exhausting from the side vents..



--- Quote from: baldurn on October 08, 2022, 06:09:51 pm ---As to the warranty, I think EU laws specify they would need to honor that unless they can show that your modification is the reason for the failure. For example they could claim your new fan provided insufficient cooling. But only if the failure was something that could be caused by insufficient cooling. I would not worry too much in this case because it is a relatively inexpensive device.

--- End quote ---

Mh, as a matter of fact, it's such a fuzzy point that they could claim one has damaged it by just opening the case, and then say "sue us, pal". Anyway, it's true that even considering my shallow pockets, losing 500e won't change my life. It's that one buys a scope and has to start doing modifications in the inside from the first day that annoys me.

balnazzar:

--- Quote from: Fungus on October 08, 2022, 02:36:26 am ---
--- Quote from: nctnico on October 07, 2022, 10:07:12 pm ---Perhaps there is someone selling aftermarket casings to hold both boards together. Or make something out of wood or metal that does the same.

--- End quote ---

I have a laser cutter so I thought of mounting mine on a wooden base. The AD2 doesn't have any screw holes though so it would have to be zip tied down or something.

A 3D printed holder would probably be best but I never got around to it.

--- End quote ---

Mh, I was reflecting upon that.
It should be something that has very tight tolerances, length and width wise. Then, you have a top and a bottom part of the "case", and they screw upon each other. If the upper one can extert a slight amount of pressure upon both the AD2 and the BNC adapter, it will be OK. Again, it's a matter of tolerances.

A plastic case would be ideal. As you have mentioned, one should use a 3D printer.
There are numerous 3D printing services on the Internet, but the problem is that's difficult to draw a sufficiently accurate schematics for them to work with...

baldurn:

--- Quote from: balnazzar on October 08, 2022, 06:21:55 pm ---Mh, as a matter of fact, it's such a fuzzy point that they could claim one has damaged it by just opening the case, and then say "sue us, pal". Anyway, it's true that even considering my shallow pockets, losing 500e won't change my life. It's that one buys a scope and has to start doing modifications in the inside from the first day that annoys me.

--- End quote ---

The "sue us" is what makes them give in. Because these days there are small claims courts where you can bring the case with very little cost to you. They on the other hand would need to hire an attorney to go to your country and even if they win, you will not be paying that. So they lose no matter what. It is usually not worth it for cheap devices unless they want to make a point.

The real danger of bad customer support is when they take in the device and then keep it for months before returning it still broken.

Does anyone have experience with Siglent.eu in this regard? I have bought a few things from them but never had to return anything.

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