You're right about the transients and the sidebands they create. Keyed
CW creates sidebands too. I don't think those sideband components could
be accurately called intermodulation products though.
> But there is a discontinuity that results from switching between the two
> frequencies, which produces transients that will excite intermod. Think about
> it -- even if you manage to switch at a zero crossing, the resulting
> waveforms have two different slopes by virtue of their different frequencies.
>
> If you doubt that, look at the spectrum of your "real FSK" in an analyzer set
> for high frequency resolution.
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|