Choosing Blu ray player

[Feanor]

I read his article and he does make sense. I agree with him that RCA connectors and its wiring may cause reflection due to not being 75 ohm. That is something we don't have control over unless doind some serious DYI wiring

But there might be a flaw in his assumption of timing reflection. He assume that that space timing of digital signal is constant as for rising and falling time. But if one look at the coaxial signal itself, we can see that timing between rising and falling signal is not constant:



The signal is encoded in Manchester coding and and as you can see the timing vary between when signal fall and rises. So when we do have a reflection as Steve Nugent mentioned, one will never know whether the reflected signal will arrive at rise/fall time of source signal, or when the souce signal is at steady state.

Also he mentioned that we may have reflection at these point along transmission-line components:

The traces on the Transport circuit board that connect to the driver chip
The wiring to the output connector
The output connector jack and plug (BNC or RCA)
The digital cable
The input connector jack and plug at the DAC input (BNC or RCA)
The wiring to the circuit board
The traces on the DAC circuit board that connect to the receiver chip

So how do we accont for the timing of all these reflected signal?

Well I don't understand Manchester encoding and I suppose we do have to account for all those reflection points.

Do you suppose the Nugent might say that any reflections would be significant only if they affect the trailing edges of their related square waves, Manchester encoding notwithstanding? All the earliest & strongest reflections would, I presume, arrive within a few nanoseconds.