Personally I'd always recommend using Belden 1694A cable with suitable 75R BNC connectors for digital duties. The cable performs well to over 3GHz which is the limitation for BNC connectors anyway.
Something like this from Canford Audio would do the job and so cheap you could buy a dozen
https://www.canford.co.uk/Products/...U11-BNC-3G-Male-cable-rear-twist-Belden-1694A
Personally I use Belden 1694A with Canare 75R BNC connectors that I bought off a well known UK seller on e-bay for about £20 and it easily outperformed a Chord Co. Shawline digital cable.
For what its' worth I've personally measured some generic 50R and 75R RS coax cables and found them to have very poor impedance above a couple of hundred MHz and certainly not as good as the Belden cable. What is really important when making up cable like this is the integrity of attaching the connectors to the cable itself so it's important the supplier has the correct crimp tools and knows how to use them if the full performance is to be achieved.
Something like this from Canford Audio would do the job and so cheap you could buy a dozen
https://www.canford.co.uk/Products/...U11-BNC-3G-Male-cable-rear-twist-Belden-1694A
Personally I use Belden 1694A with Canare 75R BNC connectors that I bought off a well known UK seller on e-bay for about £20 and it easily outperformed a Chord Co. Shawline digital cable.
For what its' worth I've personally measured some generic 50R and 75R RS coax cables and found them to have very poor impedance above a couple of hundred MHz and certainly not as good as the Belden cable. What is really important when making up cable like this is the integrity of attaching the connectors to the cable itself so it's important the supplier has the correct crimp tools and knows how to use them if the full performance is to be achieved.
