Products > Test Equipment
Choosing an oscilloscope
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0culus:

--- Quote from: tautech on October 03, 2020, 06:05:20 am ---
--- Quote from: 0culus on October 03, 2020, 04:43:59 am ---
--- Quote from: tautech on October 03, 2020, 04:24:04 am ---
--- Quote from: 0culus on October 03, 2020, 04:20:32 am ---My 1960s boat anchor 585A uses over 700 watts. Fight me.  >:D >:D >:D

 :-DD

--- End quote ---
AKA space heaters.  :P

--- End quote ---

Dude, it's gonna be awesome here in a couple months.  :P

--- End quote ---
Awesome, yeah right. A scope you can only use in the winter months.  ::)

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I have A/C...and apparently way cheaper electricity than some folks.  :-DD
David Hess:

--- Quote from: PurpleAmaranth on October 02, 2020, 11:13:39 pm ---I'm debating between three scopes of around the same price: Tektronix 2235 AN/USM 488, Fluke PM3370A, and an old Soviet C1-99.
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Of those, the Tektronix 2235 is the best documented and easiest to repair.  The Fluke PM3370A is a lot more complicated because of its digital storage capability and I would not recommend it unless you are prepared to repair and maintain a more complex instrument.  I would say the same thing about the Tektronix 2230 or 2232 which are 2235s with added digital storage capability, the extra complexity makes them more difficult to maintain.

I always wanted one of those Flukes but ended up with Tektronix 2230s and 2232s instead.


--- Quote from: george.b on October 03, 2020, 12:03:24 am ---The PM3370A has only 100MSa/s on the digital side, which makes it not terribly useful in that function beyond some 20MHz, but the ability to take single-shot captures is very nice to have nonetheless.
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The 50 MHz Fluke has a 100 MS/s real time sample rate, which is the same as its contemporaries like the Tektronix 2232 and completely sufficient since it also supports peak detection and equivalent time sampling for a much higher sample rate on repetitive signals. 


--- Quote ---Whether that's enough to tip the scales against the Tek depends on what you'll mostly be using it for.
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The storage capability is very useful but adds considerable complexity to an old oscilloscope.
Fungus:

--- Quote from: David Hess on October 03, 2020, 12:35:13 pm ---Of those, the Tektronix 2235 is the best documented and easiest to repair.  The Fluke PM3370A is a lot more complicated because of its digital storage capability and I would not recommend it unless you are prepared to repair and maintain a more complex instrument.

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Somebody who's buying their first oscilloscope and trying to save money shouldn't be thinking of repairing or maintaining at all, IMHO.

An entry level DSO isn't that expensive.
0culus:
If he can get it cheap it could be something to grow into even if it turns out to be a project.
tautech:

--- Quote from: 0culus on October 03, 2020, 07:20:10 pm ---If he can get it cheap it could be something to grow into even if it turns out to be a project.

--- End quote ---
But lessens the budget to get something better and just stifles getting on with your projects.

For once I'm with Fungus and his thanker Nico on this one.

If one gets a hankering to fix scopes later there's plenty of cheap ones available if you are patient and by then you've become a little proficient using a scope.
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