I don't know what the entire frequency range of modern cable TV/cable internet is, but not all splitters work the way you described. They fall into two general categories: resistive (lossy) and low-loss. The resistive ones cause at least 6 dB per two-way split or in the general case, 20*log_10 (N) where N is the order of the split (i.e., an "N-way" split). Their advantage is that they are cheap and very broadband. The low-loss ones usually consist of an array of matching elements plus load resistors - which only come into play when outputs are not properly terminated. Even these do not reach 10*log_10 (N) "loss" (power division) but can come close, but they are limited to two or three octaves of frequency at most (e.g., really good ones achieve a 5:1 max:min frequency ratio), whereas resistive ones will work all the way down to DC. On Mon, Feb 2, 2015 at 9:41 PM, Neil Cherry wrote: > With each split there is a 3db (halved) power drop > > /-----------------[ n - 3.5db - 3.5db ]- > -[ n ]-+ /-[ n - 3.5db ]--------- > \-[ n - 3.5db ]-+ > \-[ n - 3.5db - 3.5db ]- > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .