I would like to "reinforce" again my earlier statements. I look at this "feature" of the Hiface unit, the non-standard high output level, as a gift, rather than a problem. Because with normal levels the usage of an attenuator gives more problems than benefits. The standard receivers widely applied in the industry do not like even the standard levels, forget about less!
Would like to repeat, the attenuator is NOT a remedy for the level problem, it's a clean-up device for the SPDIF signal transmission problem! What I feel missing here is the common sensation, about how hard it is to put together a good working SPDIF line. Because it's not ONLY a good cable; a good transmitter, a good receiver. It's all of these AND the right interfacing between them.
Because we are injecting high speed RF energy into a transmission line, and would like to recover a clean signal at the output.
But the injected energy must go somewhere, if it remains in the system bouncing up and down, it will just muddy up the output. For this we should aim for resistive termination impedances everywhere, so as to burn away into heat the injected energy at these termination points. BUT it usually does not work! The line impedance mismatches, the connectors, the transformers applied, all the stray capacitances which sneak into the picture are causing deviations from the ideal termination condition, spoiling the result.
So, a good quality, factory guaranteed resistive element inserted into the line helps greatly to damp, burn away the extra energy and restore the clean conditions.
I would not "repair" the Hiface!
Edited by joseph k - 6/18/10 at 10:56am