In article ,
"Doug Dotson" dougdotson@NOSPAMcablespeedNOSPAMcom wrote:

I seem to remember that the rationale was
that digital synthesized rigs are plenty stable enough to be relied upon
to openate on frequency.

That's not the point at all. It is, that commercial Type Accepted radios
are all channelized frequencies as specified by the ITU, and therefore
the frequency control system must be channelized with just ITU
Frequencies avalable for selection, in order to meet Type Acceptance.
That is just one of the technical differences between the two radio
types. Stability hasn't been the issue for about 10 years. IMD
on the otherhand IS a very big issue for Type Acceptance, and most
Ham type radios can't meet the IMD spec, or even get in the same
ballpark.

Me