On Thu, 2011-03-17 at 17:11 -0400, Bob Ammerman wrote: > One of my customers asked me if I knew of a product like the following=20 > (which he plans on installing in his house): >=20 > Given: > (1) a coax cable carrying the local Time Warner signal, and > (2) a second coax connected to an OTA antenna >=20 > Is there a device that would let him combine the two signals on one coax= =20 > (presumably by frequency shifting one cable's signal)? >=20 > I am assuming there would then be another device to split the two signals= =20 > out again. >=20 > Google has not been my friend on this, either because it doesn't exist, o= r I=20 > just don't know the right incantation to find it. >=20 > His motivation is to be able to use the existing single coax routed=20 > throughout his house to carry both cable and OTA channels. You are correct, they both use the same bandwidth so you'd need something to shift the frequency up on one end and down on the other, very messy, not something you'd find at Best Buy. An alternative he may not have considered: switch to satellite (either Direct TV or Dishnet). Satellite uses 900MHz-2000MHz, and splitters called "diplexers" are common, they combine the ~40-900Mhz band on one input with the 900-2000MHz band on the other input onto one coax. The same device is used to split them back on the other end. Dirt cheap (I bought 2 for $10). TTYL --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .