John Shutt wrote: > Yes, and just exactly when do you think we'll stop > broadcasting analog FM? I'm just saying that you can't compare the bit rate of a scheme that sends both digital and analog simultaneously over the FM band (including guard bands) with one that only sends digital. > The system is designed so that if the digital signal > fades below reception threshold, the receiver > switches to analog. No cliff edge effect. Yes, but that is in part to counter the way lower power ibiquity can use for the digital sidebands, compared with what's on the primary analog channel. The cliff effect would occur much later if the digital were not so hampered by having to play second fiddle to the analog stuff in the main 200 MHz FM band. All in all, you gain little with this IBOC approach compared with what DTT is doing. It's messy. 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.