> >Proportional control was achieved by using variable
>>mark-space ratio fixed frequency tone bursts
>>(or transmitter on bursts).

> The Galloping Ghost control was sent by a continuous mark space 
> signal, not
> a burst signal.

We are probably both describing the same thing. To have a mark space 
you need 2 different states. This could be eg a tone modulated on a 
carrier or a carrier being switched on and off, which is what I was 
referring to. In such a situation the actual mark space modulation and 
"frequency" of reoccurrence of mark-space frames would be at a far 
lower rate than the tone frequency and a far far far ... lower 
frequency than the carrier frequency.


        RM



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