Marcus,
any PAM signal with symbol rate R can be transmitted using bandwidth R/2
(essentially a sinc pulse; this is the case when you put 0 as the roll-off factor of an RRC).
I thought your comment was not specifically for CPFSK,
but general transmission schemes thus my clarification.
If it is specific for CPFSK then kindly disregard the above.
Achilleas
> So, I will need you to *explain* how you can transport 1.somethingMb/s
> through a 625kHz wide channel if every time you use that channel to
> transmit a symbol, only one bit can get sent. How do these numbers add
> up for you? You've got a serious problem with your pulse shaping, there.