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 ============================== "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx> wrote: I have my doubts. However, I would ask again. if this is true: "The devices detected DTV signals above -114 dBm-the sensitivity threshold suggested by the technology companies of the White Space Coalition-100 percent of the time, according to the companies." then why don't the tuner manufacturers improve all DTT tuners to be that sensitive? That would improve long range detection and/or allow for use of lower power transmitters. Assuming, that is, the spectrum wasn't full of noise makers such as these devices they want to allow. I trust the FCC will do an objective retest. Bert --------------------------------- Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.