Re: Topband: Digital mode spurious issues

["Tom W8JI" <w8ji@w8ji.com>]

> How is this different than RTTY using the AFSK method?
> In my FT-1000D, if you try to use FSK mode for RTTY it
> turns out that the rig is still running AFSK, using
> an internal audio source.
I've never looked at the FT1000, but I doubt that is a clean system. It 
would still be like a SSB transmitter with audio signals if that is how they 
do it. It would be much better to actually shift a carrier, and not do the 
baseband audio signal run though a balanced modulator and then through a 
sideband filter. 

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