It's not just how stringent the requirements of a standard are, but how economically they can be achieved in a real world receiver. John ----- Original Message ----- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx> > Interestingly, the terrestrial receiver requirements are not all > that stringent, at least comparing the performance minima set > for 3.3 b/s/Hz (equivalent to 8-VSB). This includes sensitivity, > dynamic range, adjacent channel rejection, co-channel rejection, > and C/N margins required in gaussian noise or with a single 0 dB > echo. In all the above, A/74 is similar or more stringent, where > it gives goals, or the newer ATSC receivers themselves measure > within these specs, even when A/74 does not explicitly state a > goal. ---------------------------------------------------------------------- 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.