Dan Grimes wrote: > I live in about as perfect of an environment as one can hope for > ATSC: line of sight to the transmitting antennas, open valley, > few reflections. It doesn't work on the lower floor at my house. > I had to install an outdoor antenna. I remembered those articles by Charles Rhodes, on IM3. Could that be the problem? If you have close by transmitters and are trying to receive a somewhat weaker signal from a more distant or lower power transmitter, the intermodulation products may be less than 15.2 dB down compared with the signal you want? If that's a problem, it's really a receiver design problem, exacerbated by the US habit of distributing transmitter towers hither, thither, and yon. I think receivers need to have tracking front ends and dual IF stages. Most probably don't. The outdoor antenna might get a strong enough desired signal to overcome this? Bert ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.