Thank's for the info Tony
Ah, clash of times, the new version has some re-working of the lower speed's , a lot of test data has only been made available, since the modem entered service , we could only test over the 1000 mile path UK<>EA . The latest HF version is now frozen , good reports of maritime mobile EU<>VE exchanges on 7 MHz , are posted in the google 'vara' group.
The power consumption ofdm / mmfsk is relevant, in the sense , that it affects the system s/n moving from 25 watts average power , vara mode designed tx level , to single carrier , 100% duty , raises the level by 6 dB , but at a disproportionately lower data rate .
Work and testing continues for the high speed 'FM' variants , both standard 2 meter FM and 9600 baud replacement modem , topping out at 15K bps
Take up on these versions has not been too high , possibly as there point to point only , suited for trunking links , where as the existing systems , 1200/9600 baud are capable of supporting packet ax25l as well, due to frequency tolerance , there only suited to FM transmission, where the tone frequencies are protected by the modulation type.
Pactor 4 , yes , that remains to be tested , if any one can undertake such a test , the results would be quite interesting ..