On Jun 5, 2011, at 4:50 PM, Kok Chen wrote: > > 300 baud with a 170 Hz shift is a higher baud/shift ratio even than what is used in MSK (Minimal Shift Keying). Whoops, sorry. 300 baud at 170 Hz shift is *lower* than the MSK limit. An MSK signal that looks like 170 Hz shift would have a baud rate of 340. 73 Chen, W7AY