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Using an oscilloscope for data acquisition
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Fungus:

--- Quote from: Someone on April 13, 2023, 10:33:58 pm ---the hardware of many scopes could do this task (at some lower sample rate) but the manufacturers don't see the point in adding that feature as its such a niche use and has high support costs.

--- End quote ---

Plus: The results would probably be so bad that most people would just go online and be angry about it.

"My 'scope is capable of 2GS/sec, why can it only stream at 100kS/sec.??"

What manufacturer needs that?

(A sound card will do better: You can get 384kHz, 32-bit sound cards quite cheap these days (under $150), they'll stream data all day long because they're designed for that)

Edited for clarity
2N3055:

--- Quote from: Fungus on April 13, 2023, 11:07:30 pm ---
--- Quote from: Someone on April 13, 2023, 10:33:58 pm ---the hardware of many scopes could do this task (at some lower sample rate) but the manufacturers don't see the point in adding that feature as its such a niche use and has high support costs.

--- End quote ---

Plus: The results would probably be so bad that most people would just go online and be angry about it.

"My 'scope is capable of 2GS/sec, why can it only stream at 100kS/sec.??"

What manufacturer needs that?

PS: You can get 384kHz, 32-bit sound cards quite cheap these days (under $150). They'll stream data all day long - they're designed for it.

--- End quote ---

Opening question was for 20MS/s..
Fungus:

--- Quote from: 2N3055 on April 13, 2023, 11:08:49 pm ---Opening question was for 20MS/s..

--- End quote ---

I know. I was trying to point out that a sound card would probably be better than any existing 'scope. Post edited for clarity.
jonpaul:
If the OP wants 8 bits at 20 M samples/sec, exp[ect to pay a lot.

Thyer PC or devices the OP uses  must have the memory to accommodate the data flow, or a real time DSP/Analyzer.

Depend on the application, many PC cards and DACs exist for A to D conversion, but none are intended as a scope.

See TI for an IC

https://www.ti.com/lit/ds/snas136m/snas136m.pdf?ts=1681435728055&ref_url=https%253A%252F%252Fwww.google.com%252F

National Instruments modules

https://www.ni.com/en-us/shop/hardware/products/multifunction-io-device.html

Jon
maxwell3e10:
An inexpensive solution that would mostly work is a USB logic analyzer with an analog channel. There are many versions but I played at some point with LHT00SU1 for $20. It can stream 16 MHz 8 bit data to PC using sigrok until stopped by user. The only issue I found is that it needs a high-quality USB cable to work reliably.
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