I chose the 250 and 500 filters for my narrow ones. I set the 250(370) at
400 and the 500(565) at 600. Works great for me. Just played in the RTTY
contest last night and with the bandwidth down to 400 or 350(bringing on the
select for the 250) if needed after tuning to the signal (SP) I was
Made me wonder though if one could decode two signals intertwined but
individual mark and spaces traces in the clear form each other?. I would
think it might be possible. Anybody done this?
RTTY tones have sidebands, and since the Tx logic is not usually shaped
to move optimally between
On Jul 18, 2010, at 6:11 PM, Jim Miller KG0KP wrote:
Made me wonder though if one could decode two signals intertwined but
individual mark and spaces traces in the clear form each other?.
Yes, you can, and the method is regularly used by some RTTY folks.
It is called Mark-only or
RTTY tones have sidebands, and since the Tx logic is not usually shaped
to move optimally between the tones, but instead tends to switch
abruptly, each tone has sidebands beyond the minimum necessary.
I should add that most systems, including the K3, use phase-continuous
tone switching to
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