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Choosing an oscilloscope
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nctnico:
The spec sheet I found for the TDS684C didn't list peak detect but either way if you look at the TDS500 / TDS700 series you'll find these all have peak detect (and high res mode as well). But it doesn't matter much anyway because these series are very old. I have owned several scopes from these series but nowadays I wouldn't bother.
Martin72:

--- Quote from: nctnico on October 03, 2020, 12:06:19 am ---BTW I disagree about the RIgol DS1054Z. It is very outdated; people keep recommending it out of momentum but there are better options out there nowadays. Just search this section a little.

--- End quote ---

I would recommend it because it works stable and is long enough on the market, to have it nearly bug-free what the important funtions concerns.
The 50Mhz version cost about 349$/365€ and is easy to hack it up to 100Mhz bandwith and deeper memory.
Plus lots of math, a good variety of trigger functions, etc.
So for 349$/365€ you got  a scope with 100Mhz bandwith, 28Mpts memory, advanced math and trigger functions, decode functions.
Which scope costs less and got more ?

nctnico:

--- Quote from: Martin72 on October 11, 2020, 08:58:39 pm ---
--- Quote from: nctnico on October 03, 2020, 12:06:19 am ---BTW I disagree about the RIgol DS1054Z. It is very outdated; people keep recommending it out of momentum but there are better options out there nowadays. Just search this section a little.

--- End quote ---

I would recommend it because it works stable and is long enough on the market, to have it nearly bug-free what the important funtions concerns.
The 50Mhz version cost about 349$/365€ and is easy to hack it up to 100Mhz bandwith and deeper memory.
Plus lots of math, a good variety of trigger functions, etc.
So for 349$/365€ you got  a scope with 100Mhz bandwith, 28Mpts memory, advanced math and trigger functions, decode functions.
Which scope costs less and got more ?

--- End quote ---
Depending on where you live the GW Instek GDS1054B is on par price wise and has a more modern & faster hardware platform. This has been brought up before so you are kind of proving my momentum point.  8)
Martin72:
Hi,
GW intek I´ve known as a c-brand so far.(we got some frequency generators from this brand)
And searching this model you named, it seems to change nothing about this.
It costs 465€ in the cheapest way in germany, 100 bucks more than the rigol.
I´ve never worked with this, so I could only compare it´s features against the rigol.
And it losts against the old fashioned one..
On the paper, in practice I would like to see a comparison vid from both.


David Hess:

--- Quote from: nctnico on October 11, 2020, 06:30:08 pm ---The spec sheet I found for the TDS684C didn't list peak detect but either way if you look at the TDS500 / TDS700 series you'll find these all have peak detect (and high res mode as well).
--- End quote ---

You sometimes have to dig into the documentation of each model to find details which I did several years ago when evaluating DSOs for purchase.  The early TDS600 series lacked peak detection but later ones include it like the predecessors to the TDS600 series did.  How peak detection is implemented on a CCD is an exercise left to the reader.


--- Quote ---But it doesn't matter much anyway because these series are very old. I have owned several scopes from these series but nowadays I wouldn't bother.
--- End quote ---

I have a predecessor to the TDS600 series with peak detection and it works fine.  But I agree and do not recommend such old DSOs, although they do compare favorably, even the CCD based ones, with modern DSOs in many respects.

I would definitely recommend a TDS500 or TDS700 model which supports DPO operation and segmented memory over a TDS600 model.  They can all support phase and magnitude FFTs though which is what I would prefer in a modern DSO and am still looking for.


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