John Shutt wrote: > What if this gizmo is working fine, but the user turned it on > at 1 AM, after I turned off my transmitter for the night? > (Not all stations broadcast 24/7.) (I think all TV stations transmit through the night in this market. Even WHUT, although those guys only transmit their logo in the wee hours. And their logo recently went HD and wide screen. But I digress.) What you describe would at best reduce the likelihood of interference, seems to me. There are several TV receivers out there that offer no more than around 22 dB of isolation between certain most vulnerable frequency combinations, and then 33 dB or more between the less vulnerable frequencies. So if a given channel went dark, and the gizmo took its place, at much higher power density where your receiver is, interference could still result on *other* TV channels. One way OTA users accommodate these receiver anomalies is by adjusting their receive antenna(s) to achieve good reception. That only works if the transmitters are stationary. These mobile devices coming on randomly, at random frequencies and azimuths, cannot help but create problems when they are close enough. Take the antennas in my fireplace as an example. If the neighbor kids start playing with such devices in their back yard, or even in a room facing my fireplace, they should have very little trouble overwhelming TV signals. We live in a valley, not within LOS of any transmitter, so the TV signals are attenuated more than free space path loss. But those nearby mobile signals are only attenuated as the square of the distance (free space loss). In essence, the FCC would be playing in the hands of the MVPDs by allowing these auto-detection devices. OTA folk would get disgusted and cave in. Just like the FCC did when they mandated unbundling of the telco xDSL lines. It discouraged telcos from installing these lines, and cable had a broadband monopoly for several years. 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.