Options
Question about Coaxial digital
dazb
Posts: 3,247
Forum Member
✭✭✭
On my sky HD box got a coaxial digital input also have one on my receiver which is a Yamaha RX v363. The one on my receiver says DVD so can this only been used only for a DVD player,
0
Comments
They aren't really 'different' - they are both the exact same coaxial signal, just with an LED stuck on the output (to convert it to a light signal) and a photo-transistor stuck on the input to convert it back to coaxial.
Mostly it's just an advertising con, people think as a CD/DVD is optical it's a direct clean signal straight from the disc, whereas it's just a crude conversion from the coaxial signal inside with an LED.
You could clearly trace the PCB tracks back from the sockets to a pair of resistors. The other side of the resistors were joined together and a single track led back to the driver IC.
Exactly, it's just an LED or a photo-transistor connected to the coaxial output/input.
I work on telecoms Transmission Systems and I agree. The only difference between co-axial digital and optical digital is one is electrical pulses and the other is light pulses. They both start from the same source and from a transmission point of view there is no difference as long as what is received is identical to what is sent.
The only thing I would say, based on the systems I work on, is that optical interfaces are more likely to fail than electrical ones. But that doesn't mean that is also true of domestic equipment!