I’m putting a preassembled DAC board into a chassis that I’m making.
The board is DIR9001 and CS4398.
It’s only input is S/PDIF Coax (there’s no optical, hdmi or usb)
The PCB Mount RCA connecter was not included, so I sacrificed an old video cable that came free with another piece of equipment. I cut the yellow end off, and soldered it right to the board. (Picture attached) I also note there’s a 75ohm resistor already there right on the board.
When this gets assembled into its chassis, I’ll want to use a better cable, and connectors to provide flexibility if I ever need a different cable length.
My plan was to put a panel mount female BNC on the chassis, then use a short (1 or 3 inch) piece of coax inside the chassis between the board and the BNC. Then I came across something saying that short spdif coax cables were bad, because of reflections throwing off the clock or something?? I can’t find that article now.
Should I use a twisted pair of wires instead??
The board is DIR9001 and CS4398.
It’s only input is S/PDIF Coax (there’s no optical, hdmi or usb)
The PCB Mount RCA connecter was not included, so I sacrificed an old video cable that came free with another piece of equipment. I cut the yellow end off, and soldered it right to the board. (Picture attached) I also note there’s a 75ohm resistor already there right on the board.
When this gets assembled into its chassis, I’ll want to use a better cable, and connectors to provide flexibility if I ever need a different cable length.
My plan was to put a panel mount female BNC on the chassis, then use a short (1 or 3 inch) piece of coax inside the chassis between the board and the BNC. Then I came across something saying that short spdif coax cables were bad, because of reflections throwing off the clock or something?? I can’t find that article now.
Should I use a twisted pair of wires instead??
Attachments
The shorter the connection the less harm it can do. For a very short connection the coax 'pigtails' can be longer than the cable, so no point in using coax. Just use a twisted pair - but make sure you know which is ground and which is signal! For longer internal connections use coax - quite thin flexible 75ohm coax is available.
There is no need to use 'better' cable. Decent video cable is fine. SPDIF is a relatively undemanding use of cable.
There is no need to use 'better' cable. Decent video cable is fine. SPDIF is a relatively undemanding use of cable.
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