Are my CAT5 and router my weak link?

Eniac26,
So what is the brand of the opto isolator and where can I buy one?
Thanks in advance!

Steve

Interesting Bryon, I am trying to work this out in my head.....

I need the wireless router on because my iPad controls the computer wirelessly. The computer, via PS Audio's eLyric, then sends the data to the Perfectwave DAC.

So.....

Computer to the switch via CAT7.

From the switch: one cat5 to the router, one cat7 to the DAC

Then modem will still be connected to the router....then to the switch....then to the computer.

I am basically just adding a switch between the router and computer, while bypassing the router from the computer to the DAC....via the switch. I need to draw this out before my brain explodes! Hahaha

Jeff

Jeff, you've got it right, except that it would probably be a good idea to upgrade the router-to-switch cable, in addition to the others. Although that cable will no longer be in the signal path between the computer and DAC, it could still conceivably radiate or couple digital noise into pathways that ultimately lead to the DAC, or even to other parts of the system.

Considering the low cost that is involved, Bryon's suggestion of the switch seems worth trying, although whether or not it will make a difference for the better is anyone's guess. Among many other things, it would depend on how the characteristics of digital noise generated by the switch may differ from the characteristics of noise generated by the router; on the degree to which router-generated noise can propagate through the switch; how the risetimes and falltimes of the output signals of the router and of the switch compare; and on the sensitivity of the DAC to all of these things, if indeed it has any sensitivity to them at all.

Regards,
-- Al

08-14-12: Jeffatus
The modem will still be connected to the router....then to the switch....then to the computer.

I am basically just adding a switch between the router and computer, while bypassing the router from the computer to the DAC....via the switch.

That's right, Jeff. But Al is correct when he says...

...Bryon's suggestion of the switch seems worth trying, although whether or not it will make a difference for the better is anyone's guess. Among many other things, it would depend on how the characteristics of digital noise generated by the switch may differ from the characteristics of noise generated by the router; on the degree to which router-generated noise can propagate through the switch; how the risetimes and falltimes of the output signals of the router and of the switch compare; and on the sensitivity of the DAC to all of these things, if indeed it has any sensitivity to them at all.

That is why I would add a SECOND ethernet switch. Yes, I know, I'm sounding crazy. But bear with me...

If you add a second ethernet switch, you can kill the power to the second switch and SEVER the ethernet connection between the router and the computer/system. I drew you a picture, which you can see here.

That is the configuration I'm currently using. When I listen to music, I kill the power to ethernet switch #2, cutting off the ethernet connection between the router and the system. That way...

1. The router remains on all the time.
2. The router is disconnected from the system when listening to music, and reconnected to the system with the flip of a switch (pun intended).

How does your brain feel now? :-)

Bryon

Hi Bryon,

Note, however, the statement in Jeff's most recent post that:

I need the wireless router on because my iPad controls the computer wirelessly. The computer, via PS Audio's eLyric, then sends the data to the Perfectwave DAC.

So if I understand correctly, in his particular situation the connection between the router and the computer needs to be maintained during music playback.

Best,
-- Al