EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Alessss on September 20, 2024, 09:42:48 pm
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Hello everybody,I'm an automotive technician and I'm looking for my first oscilloscope to measure can and ethernet lines.
The transmission speed varies between 100 MBit/s ethernet and 100 - 500 kBit/s for can.
I have seen the Fnirsi 2C23T but I do not know if it can do its job properly, alternatively a Rigol DS105AZ but please recommend other manufacturers and models.
I am an apprentice and I do not know how to use an oscilloscope well but I am still looking for a reliable product with which I can experiment at home.
I have no preference whether in the form of a multimeter, "desktop" or usb, I would like it to cost a maximum of $ 400
Thanks in advance
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To do a decent job of monitoring and looking for problems on 100Mbit Ethernet you would need at least a 200MHz scope, The FNIRSI won't be effective for Ethernet.
What is it you will be looking for? There are better tools for looking at Ethernet than an oscilloscope. Some scopes have the ability to decode CAN signals, as well as looking at the waveforms. In both Ethernet and CAN you can have "healthy looking" signals in the cable but at the same time not have any kind of viable communication.
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As BillyO says 100MBit ethernet / BroadRReach is going to push you to a faster / more expensive scope and not many scopes can decode it (other than the higher end PicoScope oscilloscopes it is a paid for option which will cost more than your budget for a scope). Given this protocol is only used on a few vehicles for a few systems (ADAS and in somecases video infotainment) you might want to consider compromising here and focus for your first automotive scope on choosing a scope that can capture and decode the majority of automotive signals (CAN, LIN, FlexRay, CAN FD etc) as well of course all the other sensors / actuators (ABS, injectors etc).
Dont forget that as well as the scope you will probably need current clamps, ignition pickups (unless EV only) and HV diff probes etc.
As I work for Pico I am of course going to recommend https://www.picoauto.com/products/automotive-oscilloscope-kit/overview (https://www.picoauto.com/products/automotive-oscilloscope-kit/overview) as the right tool for the job but this will take you over budget