Hey Hari, just thought I’d provide my 2cents on this:
The engineering behind’s Steve Nugent’s PFO article is real, though a little skewed I feel.
In a typical home S/PDIF interconnection, the reflection coefficient would be rather inconsequential (S/PDIF is also spec’ed to 75Ohm, and with a wide margin). Probably explains why one can use even the cheapest RCA cables and things still work well enough, subjective qualitative debates aside
Ironically the article isn’t accompanied by any empirical demonstration of the issue, would be simple enough to show with any basic digital Oscilloscope. It’s not just him though, I don’t seen any cable manufacturer proving their case for this “minimum digital cable length” argument in in a real-world setup.
The dCS’ clock ports are engineered for 75 Ohms matching. If you’re worried about 0.5m, just try one, won’t cost you much more than a cup of Starbucks coffee for a properly spec’ed 0.5m 75 Ohms BNC cable that can easily handle even Gigabit-rate digital transmissions, let alone a 44.1/48kHz clock signal