12 GHz Bandwidth and 500-Cycle Mating Life
The 031-70530: Rated to 12 GHz maximum frequency, this jack supports the full bandwidth of 3G-SDI and 12G-SDI video signals with margin. The 75-Ohm impedance is held through the PTFE dielectric and the precision centre-contact geometry — a 50-Ohm BNC would introduce a reflection at the transition. The 500-cycle mating life is typical for a bayonet-lock BNC with gold-plated centre contact; the bayonet coupling provides quick connect/disconnect without the thread wear of an SMA, and the gold plating keeps the contact resistance stable across those cycles.
