John Bradley wrote: > > > AFSK sends diddles , as in MIXW. Nice sounding? well.................. > > JOhn > VE5MU
Any serious "routine" (see it as a program or a combination of lever movements) generates "didles" whenever there is no message to be transmitted. "Cheapo" computer programs omitted diddles for simplicity. But diddles is what identifies it aurally (or on a tuning oscilloscope) as RTTY signal and not N0N. You can tune quickly on diddles or RYRY, but not on a raw carrier (or at least it is not as simple and accurate). A waterfall helps, but before it became the usual thing, you had to relay on a scope or some other tuning aid. I added two LEDS as tuning aid to my KPC2 around 1992 and did 200 Hz AFSK using it as a dumb modem, but I was lost tuning someone without didles with only one lit LED. It was a great time waster to have to wait for someene to press the keys while losing the text. Jose, CO2JA __________________________________________ V Conferencia Internacional de Energía Renovable, Ahorro de Energía y Educación Energética. 22 al 25 de mayo de 2007 Palacio de las Convenciones, Ciudad de la Habana, Cuba http://www.cujae.edu.cu/eventos/cier
