--------------------
Don't do it...
unless the oscillator sits right next to the DAC without any optical insulation.
-------------------
capslock
Yes, the clock is on the DAC board. This is why I said there were 2 signals comming in (L/R) & data bits, and 1 going out (clock feeding back to digital side).
-------------------
If you want to isolate the two sections from each other's electrical noise, you may want to try differential transmitters and receivers (maybe some ECL logic parts?)... you can send the data streams down twisted pairs.
-------------------
Chad.
The ECL idea is good, except I'm trying to isolate everything, including RF & electrostatic. These guys will make it through the ECL, & any optocoupler & through data isolation transformers. If you want to know what kind of stuff this does to analog circuits, it's a different & new topic.
------------------
Personally, I don't think it's really worth all the effort if the digital and analogue circuits are both resident in the same enclosure.
------------------
Both sections are on different PCBs. They will both be coated with tuner stablant, the digital side will have a secondary coating of RF shielding epoxy resin, & to top it all off, both sections will be in their own double sided shielded compartment. (Like the ones on tuners.)
-------------------
You are fixing to go to a lot of effort for very little improvement. In fact, do it wrong, and it will be worse. All of the suggestions above are good, but I'm not fond of the ISO-150.
-------------------
Jocko
True. I'm making the extra effort to completely isolate everything. The idea here is that this USB2.0 6 channel sound card with built in analog pre-amp attenuator would not be affected by the fact that the PC equiptment is on 1 set of outlets from the fuse box, &, the analod side is conected directly to 3 PassLabs X350 amps, which are on a different line from the fuse box. Even though my USB sound card feeds will be balanced, the CMR of the Pass Labs amps is only -80db.
The idea here is to even better isolate the 2 sides than what would be possible with any AC 120v isolation transformers. Just that lousy ground pin alone from 1 outlet in my house to another reads between 2-8 vac, with ridiculous RF in it. This is due to my proximity to those mega huge power transmition lines & 2 AM radio station broadcaster antennas.