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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Look for a used but in good condition analog benchtop scope. Even something with a 20 MHz bandwidth should suit your needs. The problem with a USB / Laptop unit is that $100 doesn't get you much of anything. My opinion is your best bang for the buck would be a used benchtop model. Make sure you see it and it works before buying it.
For all practical purposes, there is no such thing as a PC scope with any kind of decent capabilities at all unless you limit yourself to audio work. You may see 100 MHz bandwidth, but with that you'll also see a maximum of maybe 100 MHz sample rate. The advice to get a good, used analog scope is good. There are a lot of good Tektronix, Hewlett-Packard, etc. high-end used scopes for under $200. Even ones under $100 will run circles around a PC scope. It's the difference between driving a Corvette and a virtual PC Corvette -- it may look and feel great and be cheap, but it won't get you anywhere.
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