“So going from any of the 4 jacks or SFP cage to the 5th jack blocks the clock noise. Going from the 5th jack to any of the 4 jacks or the SFP cage blocks the clock noise. Going from a 4 jack to another 4 jack does NOT block the clock noise and going from a 4 jack to the SFP cage does NOT block the clock noise. So as long as the 5th jack is involved in the path then clock noise is blocked.”
My understanding of this is that you need the 5th port in order to fully take advantage of the clock block noise feature.
An interesting observation here is that you actually can use the 5th port as input and as an example the optical as output and achieve the same as going opposite. This is very important to understand I think, and @Superdad may confirm so I’m not produces more confusion 😀
If you add a PC or something with a NAA in addition to port 1 to 4, would that ethernet interface possible in any way pollute any of the other 1 to 4 interfaces?
Leakages of any type or noise of any type ? (Except clock noise, which is not blocked between those 4 ports). I’m not sure here if clock noise is generated from the EtherRegen internal clock or an external source or both. Probably doesn’t matter much.
If so, some people may have a setup that they like to add a second EtherRegen, otherwise as I see it most people would only need one.
May understanding Is you “need” two , if you for some reason want to separate clock noise on more than one port. But if there exist a case where you actually may benefit from such a setup, I have no idea.
Maybe if you have dual setup of renders (Rendu’s).
I now also see Alex wrote:
“They are all very clean—with great clocking—and they all block leakage currents (due to other design choices), it is just that as John explained—and you understood—one copper port is entirely in its own domain, sobest use of the EtherREGEN will be as you describe, using both sides.“
Which answer on of my question above, so basically then my understanding is port 1 to 4 can’t polute each other,, (excep clock noise, where ever it’s coming from?), and hence you probably could have two Rendu’s as an example connected to J1 to J4 or the SFP, and another EtherRegen won’t make any difference in theory.