RTL SDR for electrical signal acquisition
Johannes wrote 06/16/2019 at 22:27 • 0 pointsHi,
For one of my projects I need a cheap way to aquire electrical signals with a sampling rate of 1MHz, just like with an oscilloscope.
Now I thought, RTL SDR dongles should be what I need, except I never used one and I don't know what they are capable of.
Can someone please tell me if I can acquire raw signal data with several RTL SDRs from multiple sources (almost) simultaniously?
Are there ways to synchronize the devices? Trigger events or something?
Thanks in advance!
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Thank you Martin and Krzysztof.
I guess, I'll look into the µC approach, as this seems to be the cheaper and more flexible solution for me.
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If you need CHEAP way and can program, you could use stm32 (stm32f103c8, aka bluepill), it has 2x12bit 1Msps ADC and usb. You could interleave those 2 channels to get 2msps. With some creativity you could use multiple processors to get multiple channels. Synchronizing between devices would be a matter of connecting them with one trigger. It's about $5 per one micro, but you could probably find it much cheaper, I bought complete bluepill for $4.
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Thank you, this one looks interesting!
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There are lots of ways to accomplish this - here's one: https://coherent-receiver.com/
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