Lab assessment of impedance mismatch of a UHF/SMA adapter-block

Since I’ve purchased Mini VNA Tiny, my first ever VNA analyzer, I have completely reconsidered all my beliefs around how cables, connectors and how impedance mismatches in general behave around the circuits. The situation, I noticed, is not as ‘innocent’ as it seems. Most recently, amongst many other cables, I have been measuring the loss of a very high quality Hyperflex-10 cable by Messi-Paolini. This is currently the lowest loss…