At 11:49 AM 11/17/2006, Jerry Flanders wrote: >I was thinking of RTTY, and the effect on the transmitted signal if >the signal supplied to the (non-linear final) amp has any distortion >at all, which is then made even worse in the amp. > >Or, asked another way, what would be the distortion limit of the >exciter in order to transmit a "clean" RTTY signal from a non-linear >(think C or E class) power amp using the SDR-1000 as the exciter?
It would depend on the type of distortion, but, in general, Class C and/or Class E/F amplfiers are using the input signal more as a phase/frequency reference. In a class C, the driver has to have enough power to drive the active device into saturation or cutoff as needed, but that's more a voltage swing thing for tubes and fets. For FETs the big problem is enough drive current to charge and discharge the gate capacitance. Jim, W6RMK _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
