Richard; I've d/l the report, but I won't be able to get to it for some time. I think WSDs are impractical, at leas unless accompanied by an integrated spectrum analyzer and field strength meter. WSD will probably kill people before this all over (patients in ICUs on life support, the monitoring equipment for which uses otherwise "unusued" spectrum. I don't there should be a balancing test between playing online games and interference to tv or the potential loss of life. It ain't just sat and cable boxes that will barf when this comes about. Once people get wsds, they will want "more power." RG-59; cable owns all the interference received by transmitting over that. The FCC should have mandated a phased-in approach, instead of telling cable firms they can upgrade to RG-6 in due course, as customers request fixes. (I think my mom's house was upgraded from RG-58, circa 1968 vintage, a few years back.) John Willkie _____ De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En nombre de Richard Hollandsworth Enviado el: Monday, October 01, 2007 1:13 PM Para: opendtv@xxxxxxxxxxxxx Asunto: [opendtv] Re: News: Microsoft, Philips Offer New White Space Test Results You really should read the report----the three LCDs tested were susceptible to interference from WSD signals (not the cable connection), esp. from the rear---- Which would be typical for a condo/apt. neighbor's WSD device: http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-275668A1.pdf Also note that they used all new cable connections and didn't assess leakage into 30-year old RG-59 with connectors in various states of disrepair.... WSD proposal for fixed devices is 36 dBm EIRP (1 watt with 6 dBi antennas). At 2 meters, interference was noticable with WSD EIRP as low as 15.3 dBm (11 mW). But your HDTV may be less than a foot away from your neighbor's WSD.... And LCD's probably have more "metal" in them than most TVs, RPTVs and "sticks".... which weren't tested.....yet.... Surely you're not suggesting all TV, DTV, Cable and SAT systems must somehow backfit better shielding in order to accommodate WSD.... PS: Here are the channel occupancy test failures--the WSD guys want a "DO OVER": http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-07-3457A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-275666A2.pdf But as I said, this all seems to be a waste of effort at this point.... holl_ands johnwillkie <johnwillkie@xxxxxxxxxxxxx> wrote: Yes, but cable in particular owns all the interference in their cables, and can't create much interference outside of their cables. Kinda sad for the vendors of the boxes, since they will have to start replacing them. I hope they enjoyed the temporary price savings by not having proper shielding for emerging networks in homes. My Nextel mobile phone interferes with my computers and computers in other people's homes; we get period 'chugging' sounds in computer speakers. The phone has all required certifications, and the computers are class b certified computer devices. Then, there's the deliberate interference caused by HdRadio. I'm afraid the commission has been ignoring the interference constraints in the Comm Act for some time, or has redefined interference. John Willkie _____ De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En nombre de Richard Hollandsworth Enviado el: Monday, October 01, 2007 12:10 PM Para: opendtv@xxxxxxxxxxxxx Asunto: [opendtv] Re: News: Microsoft, Philips Offer New White Space Test Results WSD only needs a GO/NO-GO detector--which can be narrowband, looking for NTSC Visual and DTV Pilot Carriers. Sensitivity is limited by the amount of noise power in the detection bandwidth. DTV's 6 MHz bandwidth results in a thermal noise of about -106 dBm....so for WSD detectors to lower thermal noise by about 10 dB, they would need a detector with about 600 kHz bandwidth. PS: Bear in mind that the "Listen and Detect" threshhold issue detracts from the REAL issue: OET tests found WSD devices cause interference to nearby Digital Cable Ready HDTV's (and probably also Cable STB/DVR's and many SAT Receivers for same reason) AND THERE ARE NO WHITE SPACES ON CABLE.... holl_ands _____ Looking for a deal? Find <http://us.rd.yahoo.com/evt=47094/*http:/farechase.yahoo.com/;_ylc=X3oDMTFic DJoNDllBF9TAzk3NDA3NTg5BHBvcwMxMwRzZWMDZ3JvdXBzBHNsawNlbWFpbC1uY20-> great prices on flights and hotels with Yahoo! FareChase.