At 9:09 PM -0500 1/30/06, Albert Manfredi wrote: >Richard Hollandsworth wrote: > >>In the dozens of spec sheets and app notes that I've read, >>I've never seen a separate RF/IF Tuner Module just for NTSC. >>They all show a common RF/IF Tuner. > >Even so, it seems that if nothing else, two demods operating at the same IF >can create leakage. But also, as long as NTSC is still on the air, and as >long as we see evidence of co-channel interference between NTSC and ATSC >stations that are not adequately separated, it seems that a combined >ATSC/NTSC receiver would be more vulnerable to self noise than an ATSC-only >receiver. > Why include an NTSC receiver, especially in the boxes that the government is going to subsidize? The set to which the box is attached most likely has one anyway, and there will be no need for the NTSC tuner when the transmitters are turned off. Regards Craig ---------------------------------------------------------------------- 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.