Description

Impedance transformation: What are the input (BNC) and output (RJ-45/twisted pair) impedances? For example: 75 Ω → 100 Ω, or 50 Ω → 110 Ω, etc. Frequency or data-rate bandwidth: What is the usable frequency range (MHz/GHz)? Or what data-rate does it support (for telecom/data applications)? Insertion loss (dB) across the band you will use. Return loss or VSWR on the coax side (and possibly on the pair side) over the relevant band. Connector details and pin-out: BNC male: cable or panel mount, how it’s wired RJ-45 side: wiring scheme (which pins go to what) and whether shielding is carried through Maximum signal / power / voltage / current: If used for video, data or RF, what are the handling limits? Mechanical & environmental specs: dimensions, mounting (inline or panel), temperature range, humidity tolerance, shielding/grounding. Intended application/environment: Is this designed for video (CCTV), for digital telecom lines, for testing/lab use? The spec expectations may change accordingly.