Oscilloscope/Function Generator with GnuRadio (using very cheap hardware)

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SUMMARY

The discussion centers on utilizing GnuRadio for creating a simple oscilloscope and function generator setup using low-cost hardware. The user expresses interest in generating and reading arbitrary waveforms in real-time with Python, while acknowledging the high cost of USRP devices. Instead, they propose using a $2 USB audio driver in conjunction with Mathematica to achieve their goals. The conversation emphasizes the need for affordable alternatives and practical solutions for beginners in RF signal processing.

PREREQUISITES
  • Basic understanding of RF signal processing
  • Familiarity with Python programming
  • Knowledge of GnuRadio software
  • Experience with numpy for waveform manipulation
NEXT STEPS
  • Research how to implement GnuRadio with a USB audio driver for waveform generation
  • Explore the capabilities of Mathematica for signal processing tasks
  • Learn about interfacing audio hardware with Python for real-time data acquisition
  • Investigate alternative low-cost hardware options for RF signal processing
USEFUL FOR

This discussion is beneficial for hobbyists, students, and beginners in RF signal processing, particularly those interested in low-cost solutions for building oscilloscopes and function generators using GnuRadio and Python.

aeftimia
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I was just getting started with RF signal processing, and I was very interested in being able to make an oscilloscope and function generator work in real time with python. Essentially, I would like some means of: *Creating arbitrary waveforms defined by a numpy array (or sending out individual pulses in real time) *Reading arbitrary waveforms into a numpy array (or receiving instantaneous voltage readings in real time)

I am quite new to this field, and I want to make sure I understand exactly what gnu radio is capable of and how I might go about setting this up.

It seems that gnu-radio is meant to interface with USRP--which is definitely out of my price range at the moment. I want to have a much better idea of what I am doing before I spend more than $20 on this.

I know $20 is not a lot, but I know that I can build an oscilloscope from a $2 usb audio driver, and I can use Mathematica (which I already have) to play arbitrary waveforms through the audio jack in my computer. Radio Shack has all the electronics I need to work with that signal. I am not looking for good sampling rates or anything fancy--yet. I just want a better grasp of the field.

So is gnu radio the best way to go about making a simple oscilloscope + function generator setup? If so, what is the cheapest hardware I would need to get something that will send/receive arbitrary waveforms?
 
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