>Hey looks familiar. I had one but lost it. There are several makes available. The one I had was made by Texscan and had AC blocking and -20 db attenuation. I used it for sweep work and troubleshooting and i feel it works wonders. I call it A "portable test point" as pin to f's just dont cut it.
This is CABL.com posting #90348. Tiny Link: cabl.co/mxFo