specific geographic exclusions -- using the 'all populated places" reference point for the location of the public service channels, with specifically mentioned short-spaced interference exceptions, using the then existing coordinates of the licensed/authorized facilities. The zones are right at the head of the FCC TV technical rules. Every engineer who has read the rules has seen them. Most hope that they never have to work in the zones. it might be helpful to look into the channel 69 WVUE New Orleans case; they had to make many changes in their plant before going on the air to prevent interference and I don't ever think they were ever permitted to use full power. John Willkie ----- Original Message ----- From: John Limpert To: opendtv@xxxxxxxxxxxxx Sent: Saturday, April 07, 2007 3:39 PM Subject: [opendtv] Re: FCC/OET Report re DTV Tuner EMI Tolerance How did the FCC address possible interference when they licensed use of the UHF T-band (470-512 MHz) to local governments in major metro areas? On 4/7/07, Richard Hollandsworth <holl_ands@xxxxxxxxx> wrote: FCC/OET-07-TR-1003, "Interference Rejection Thresholds of Consumer DTV Receivers", 30Mar2007, has been released for comment....all 221 pages worth... Although it is intended to address the impact of unlicensed use of the "White Space" in the TV spectrum, a considerable portion of the report addresses the overall ability of various "5th generation" DTV tuners to tolerate intermods and other interference: http://www.tvtechnology.com/pages/s.0015/t.4623.html http://www.fcc.gov/oet/info/documents/reports/DTV_Interference_Rejection_Thresholds-03-30-07.pdf ---------------------------------------------------------------------------- Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta.