One would hope the Chinese were smart enough to put in a repetitive PN sequence of some length (PN1023?) so that channel impulse response could be generated by a simple match filter in the DTV receiver. Al Limberg ---------------------------------------------------------------------- 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.