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Scope to look at 125 MHz RGMII interface
Northy:
Hi all,
I'm soon going to have to verify an RGMII interface, what sort of scope should I be looking at for that? Or is there something more cost effective?
Thanks,
G
Northy:
Hi,
Would anyone be able to offer some advice? This will be a large cost that I'd rather not get wrong.
Thanks,
G
Berni:
What in particular you want to see on the interface?
In general for checking signal integrity on such lines you need a scope with many times more bandwidth than the signal, so in this case something like a 500MHz scope. You will also need a active probe to avoid loading down the signal at these high frequencies.
Northy:
Hi,
Yes, just looking at signal integrity and making sure the interface is working with the most margin.
Thanks,
G
Berni:
You probably don't even need to verify it, just run a stress test on it in software while giving it some torture (like running really cold or really hot, try to jam it with RF interference etc) and if it keeps on working it is fine.
These are not that terribly fast signals so as long as the usual high speed PCB routing rules are followed it should be fine.
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