The modern definition of FSK is direct modulation of the transmitter
by the baseband digital bit stream while AFSK is modulation of an SSB
transmitter with an external audio subcarrier which is in turn
modulated by the baseband digital bit stream *externally* to the
transceiver.
73,
... Joe, W4TV
On 8/23/2011 8:45 PM, Ed wrote:
> On 08/23/2011 07:43 PM, Joe Subich, W4TV wrote:
>>
>> > So then none are using a true FSK generator ???
>>
>> No, *ALL* are true FSK - they shift *one* oscillator in the transmit
>> chain just not necessarily the VFO. However, shifting the VFO is not
>> the definition of FSK any more than keying the VFO is the definition
>> of CW.
>>
>> 73,
>>
>> ... Joe, W4TV
>
> Then exactly what is the true definition of FSK ?
>
> Ed W3NR
>
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