| Products > Test Equipment |
| Most affordable oscilloscope capable of color graded eye diagram? |
| << < (5/5) |
| nctnico:
A VNA is the wrong tool. And for RS485 / CAN you don't really need color grading. Just infinite persistence will do. But even then you'll be much better off with a DSO which can trigger on a bus fault occuring. |
| joeqsmith:
--- Quote from: MarcosL on May 10, 2022, 10:18:41 pm ---If you are probing a CAN bus you can use the PHY TX line to trigger off. According to this post: --- Quote from: Leo Bodnar on October 25, 2021, 05:38:56 pm ---If you have access to one of the devices, trigger on the signal going into CANbus phy (TX line) Leo --- End quote --- I would also like to find an affordable way to produce eye diagrams to test physical networks. I was hoping there was a device similar to NanoVNA (@joeqsmith) that could just be designed for doing eye diagrams. This would be great to probe CAN bus and RS485 if you have a wiring setup that is acting up. Does anyone know if that would be even possible with a VNA? Also is there a PC software that could do it for a cheap USB oscilloscope? --- End quote --- Sorry it took so long to get around to it. Post showing a comparison with my old LeCroy DSO and the LiteVNA. Previous post has a link to a recent video showing how it works. I have not yet released it to the public. Because of the limited frequency range of the V2Plus4 (along with other limitations) I have only been testing with the LiteVNA. Demonstrations are using the 9.3GHz harmonic mode. If there is something beyond that demo that you would like to see, feel free to ask. https://www.eevblog.com/forum/rf-microwave/nanovna-custom-software/msg4489321/#msg4489321 |
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