Hi John, For the user guide/manual I would like to add a simple table showing all the modes with their respective characteristics and a few hints about how to use them best. I know we discussed the inclusion of an interleaver and fec for the robust modes but I'm not sure where you landed with regards to the size etc. Would you mind filling in the blanks if I send you a table showing the modes available? While on the subject of new modes I wonder if you have looked any at MIL-STD-188-110 and the autobaud feature? In short its a better RSID as its in PSK and is sent at the start of each frame. It details speed and interleaver size etc. In general I think the idea of a mode id is the right one but perhaps it is already done (and better). RS ID is nice and all but its not always received and understood. Making it possible to adapt the interleaver size could help avoid fade trouble (short interleaver is then better as not all frames get scrambled). 73 de Per, sm0rwo