Nortek 2509-10 BNC video splitter

9DB TAP, 10-Pack The model 2509-10 9dB Tap (10-pack) provides a bandwidth of 1 GHz and minimal insertion loss through the tap, while allowing a signal to be tapped from the original source. The tap works asymmetrically by splitting the signal unevenly. The output has minimal loss, (1dB) while the other output has high loss (9dB). The tap can be used in reverse to combine very high signals with low to normal signals.