Rpschultz13
Well-known member
A few years ago I bought a good scope for troubleshooting, a Siglent SDS 804X HD, which is a pretty nice beginner scope for $350-450 (2 vs 4 channels). Probably way more features than I'll ever figure out, but I'm learning. One of the reasons I needed a scope, I'm designing an acoustic preamp & EQ pedal... you can only do so much with a DMM.
At some point I realized I needed to prove it's design, frequency wise... I needed to do Bode plots. I had a crappy signal generator. But the guys over on AllAboutCircuits.com showed me a real easy way, by getting a Siglent SDG1022X Plus AWG (Arbitrary Waveform Generator). You can connect the AWG and the scope (since they are both Siglent), and it does all the work for you.
You tell the scope the frequencies you want (starting freq, ending freq, points/decade, etc) and the scope tells the AWG what to do, then measures and plots the results. Plot below is the Preamp with a HPF and a mid cut at 265 Hz (look at cursors). This is a tutorial on how to set it up, it's a bit tricky the first time but after that it's super easy.
Two questions:
At some point I realized I needed to prove it's design, frequency wise... I needed to do Bode plots. I had a crappy signal generator. But the guys over on AllAboutCircuits.com showed me a real easy way, by getting a Siglent SDG1022X Plus AWG (Arbitrary Waveform Generator). You can connect the AWG and the scope (since they are both Siglent), and it does all the work for you.
You tell the scope the frequencies you want (starting freq, ending freq, points/decade, etc) and the scope tells the AWG what to do, then measures and plots the results. Plot below is the Preamp with a HPF and a mid cut at 265 Hz (look at cursors). This is a tutorial on how to set it up, it's a bit tricky the first time but after that it's super easy.
Two questions:
- Does anyone here use or have the need for Bode plots?
- If so, how do you create them?
