kelly200269
500+ Head-Fier
I use the Atlas Mavros BNC-BNC between HMS & TT2.Just be sure your connectors (and cable) are 75 Ohm, Amphenol makes both 50 Ohm and 75 Ohm: https://www.amphenolrf.com/connectors/bnc.html
A truly excellent cable. Excellent build quality, a true 75 Ohm cable, and a reasonable price to boot - about £300 for a 0.5m length.
https://www.atlascables.com/ic-digital-mavros-bnc.html