Craig Birkmaier wrote: > First, as I understand the rules these devices would not be > allowed to operate on frequencies being used by broadcasters > in the market. First, how is this deteremined? Is it manually configured (unlikely) or is it dynamically determined by the device, as IEEE 802.11 access points do? In the latter case, I think my scenario could easily unfold. Secondly, who determines what should be considered white space in a market? Is someone going to decide, for example, that WMPT (PBS in Annapolis) is not in the DC market? OTA users make use of all the channels they can get. It's one of the advantages of OTA over umbillical media, from the user's point of view. > Second, I think that the adjacent channel problem has been > overstated. At very low power levels there is very little > reason to believe that signals on adjacent channels will > interfere with DIGITAL broadcasts. Perhaps you have a point for adjacent channels, especially if the receiver is more selective than some 3rd generation ones. It all depends on relative power levels *at the receive antenna location*. I'll remind you that in my case, and in the case of the 4th gen Linx tests, just about all failures occurred with strong adjacent analog channels. But if the Charles Rhodes criteria are taken into consideration, and A/74 selectivity suggestions, maybe you're right on adjacent channel problems. > If the broadcasters were seriously interested in fielding a > competitive service, then those challenging the white spaces > R&O might have a good argument. They could demonstrate how the > spectrum in each market could be used EFFICIENTLY to offer a > viable multichannel service. I'm generally with you here. The broadcasters need to show some enthusiasm for their product, rather than appear like mere obstructionists. Definitely true. 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.