This may not be suitable from a user perspective, but how about=20 having a remotely-controlled relay do the switching for each TV set? Aromat DS2E-M or DS4E-M relays would work well - I've used them for=20 RF switching previously. The "-M" variant is a telcom-grade relay:=20 bifurcated gold contacts. Each relay would select between the outputs of your splitters. You=20 may have to use 4-pole relays to get enough isolation - one pole each=20 selects between the desired signal and ground and a third pole=20 selects one of the first two poles. The relays would have a local power supply and you would=20 capacitively-couple the output of the final relay pole to the output=20 coax. One side of the relay coil connects to the + side of your=20 local power supply, the other side of the relay coil connects via an=20 inductor to the output side of the switched coax (after the blocking=20 capacitor). Each TV would have a small box with a toggle switch. Incoming coax=20 feeds the switch via an inductor with the other side of the switch=20 going to ground. The coax also feeds the TV via another DC blocking capaci= tor. For extra points, add an infrared detector and PIC to allow=20 remote-control of the relay from the same remote that drives the TV. This may be too much work, but it seems pretty simple to me. dwayne At 03:11 PM 3/17/2011, Bob Ammerman wrote: >One of my customers asked me if I knew of a product like the following >(which he plans on installing in his house): > >Given: > (1) a coax cable carrying the local Time Warner signal, and > (2) a second coax connected to an OTA antenna > >Is there a device that would let him combine the two signals on one coax >(presumably by frequency shifting one cable's signal)? > >I am assuming there would then be another device to split the two signals >out again. > >Google has not been my friend on this, either because it doesn't exist, or= I >just don't know the right incantation to find it. > >His motivation is to be able to use the existing single coax routed >throughout his house to carry both cable and OTA channels. > >-- Bob Ammerman >RAm Systems > >-- >http://www.piclist.com PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist > >__________ Information from ESET NOD32 Antivirus, version of virus=20 >signature database 5964 (20110317) __________ > >The message was checked by ESET NOD32 Antivirus. > >http://www.eset.com --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .