how do I build a fibre optic isolation network? [Can't I simply run an optic cable from the PC to the DAC?]

[Jud]

Not sure if this is the specific thread, but:

 

While everyone is concentrating on isolating the PC from the DAC, I am interested in what noise may be introduced by the optical to Ethernet conversion in front of the DAC. @jabbr, any specs and/or other information (e.g., power supplies) available on that?