> how you used an oscilloscope to diagnose the ~1ghz bandwidth DOCSIS signals on broadband cable
I should clarify that I didn't really do any _true_ diagnostic with the scope. Simply as an attempt to gather as much data as possible, I connected the oscilloscope to see what the signals looked like. And, because, why not. I had driven 2+ hours to get there, might as well try everything! I didn't expect it to actually be able to decode the signals. I was surprised to find a correlation between the modem losing sync and a visually-distinct pattern appearing on the scope though.
I should clarify that I didn't really do any _true_ diagnostic with the scope. Simply as an attempt to gather as much data as possible, I connected the oscilloscope to see what the signals looked like. And, because, why not. I had driven 2+ hours to get there, might as well try everything! I didn't expect it to actually be able to decode the signals. I was surprised to find a correlation between the modem losing sync and a visually-distinct pattern appearing on the scope though.