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8vs 12-bit scopes in economy class - couple of questions...

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noisyee:

--- Quote from: Hella_Wini22 on September 08, 2024, 06:35:10 am ---   1. Why do all of them have such shitty displays ?
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Bigger screen means more $, higher resolution means more processor power and more $, so how to be economy?


--- Quote from: Hella_Wini22 on September 08, 2024, 06:35:10 am ---  2.  If one is to do 12-bit properly , one needs much wider datapaths and much beefier ALUs, wider memory, tighter analog circuitry WRT noise etc. If one remains bottlenecked by those, what's the real effect of going to 12-bits?
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They do have wider data path, you can prove it through the measurement value step.
They do have more sensitive trigger (digital trigger), especially when triggering noisy signal.
They do have lower noise floor (compare to their 8-bit brother).
If they don't, just don't buy it.


--- Quote from: Hella_Wini22 on September 08, 2024, 06:35:10 am ---  3. EEVBlog has said that 8-bits doesn't really make sense any more. Why would that be ?
Given the significant (~2x) ratio in hardware needed, I wonder why he says that. 8-bit should always be significantly cheaper, all other things being equal.
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Actually not 2X, mainly 50% more (8-bit to 12 bit) on FPGA and memory. The retail price difference of the two may not be that significant.
If you can buy a 12-bit scope at (almost) 8-bit price, why bother to buy the old school one?


--- Quote from: Hella_Wini22 on September 08, 2024, 06:35:10 am ---  4. How much more useful is 12-bit over 8-bit for the most of hobbyistic to prosumer audience ? Scope is all about seeing/visualising of what is going on and much less about measuring.
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To be honest, not that much.
8-bit is enough, 12-bit is better. I won't say I can't live without 12-bit, but if I had choose, I won't use 8-bit.
Digital zoom capability on 12-bit is a killer feature, but it's not always needed.


--- Quote from: Hella_Wini22 on September 08, 2024, 06:35:10 am ---  5. I guess FFT could be one field where it makes a difference. But even that is limited. FFT on a such scope is more like a toy, compared to real spectrum analyser/VNA. How many are using it and really couldn't do with it on an 8-bit scope ?
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Not that much a difference, really.
But newer products has more powerful FFT function, that makes life easier.

Fungus:
Many products are like this, eg. cars.

They could make new cars cheaper by constantly reworking the old ones and updating their production processes but they don't. They prefer to add features and keep the same price levels instead.

KungFuJosh:

--- Quote from: Fungus on September 09, 2024, 09:19:21 pm ---Many products are like this, eg. cars.

They could make new cars cheaper by constantly reworking the old ones and updating their production processes but they don't. They prefer to add features and keep the same price levels instead.

--- End quote ---

Bad example. They often keep the features the same, put lipstick on the pig, and then charge more. 😉

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