--- Quote Start ---
Ok, so you should see something that looks like a square wave then.
--- Quote End ---
Yes, I see square wave for any any signal except the external input clock.
--- Quote Start ---
You won't see that with SignalTap. You need a scope for that sort of visualization.
--- Quote End ---
I have tried this with Oscilloscope today, and I found that there was no signal coming out from SMA connectors (only noise). I checked again the board schematic and reference manual. I am not so sure but it looks like I can only drive the reference clocks (dedicated for XCVR channels) out of the board, but not the clock from core.
One point I am still confused. I am trying to have a synchronous global system clock that is used for managing and reconfigurating local MAC, PHY, traffic controller components basically. Is this necessary to have this synced when building the dual-board communication? Otherwise, the transceiver reference clock, 156.25 MHz, is used for both Ethernet TX and RX to work. My wonder is should I just make this reference clock synced or I need also to have the system clock synced? Can you help to give an advice?
Thanks again.
Honored Contributor
