[RTTY] (no subject)

[Joe Subich, W4TV]

The analog to FSK is "direct keyed" CW and the analog to AFSK is keyed
tone CW (MCW).

73,

    ... Joe, W4TV



On 8/23/2011 9:36 PM, Joe Subich, W4TV wrote:
>
>
> 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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