Yes I'll add some "sights" to the graticule some time.  An additional 
complication is that the 700B carrier spacing is non-uniform, a little 
trick to reduce PAPR.

- David

On 15/09/15 10:47, Peter Reichelt wrote:
> David and list
> As tuning is more critical on the 700 mode as compared to the 1600 mode and 
> there is an absence of a distinct central carrier then a couple of extra tick 
> marks on the FreedDV GUI showing the edges of the signal, when correctly 
> tuned, as well as the centre would provide easier tuning of signals using 
> coherent psk modes. Note this is compounded by having an even numbers of 
> carriers where correct tuning is with the centre tick mark between the 7th 
> and 8th carriers,not aligned with a carrier. It is easy to select the mid 
> point between the wrong carrier pair.
> regards
> Peter VK5APR
>
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