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Ah 2FSK , Could call it
Redundant Tone Transmitting sYstem or
RTTY for short ; -)
But , yes, Opera decoder is backwards compatible
to FSK beacons , either shifting inside the
decoder pass band or outside , as long as the
shift is past the gaud band of a few 100
mHz ,
G,
Sent: Monday, December 30, 2013 8:10 PM
Subject: Re: LF: 19:43 136 DF6NM Op32
only a test with DFCW-Opera ;-). Just another
idea to generate an Opera signal with an uninterrupted carrier, as a
workaround for transmitters with flipflops. The upper frequency
carries the desired modulation, the lower one just dumps the carrier during the
gaps. Choosing the FSK shift as a multiple of the symbol rate preserves the
phase.
Due to poor energy efficiency, this is NOT the
recommended technique to generate a coherent carrier;-)
Best 73,
MArkus
Sent: Monday, December 30, 2013 8:49 PM
Subject: LF: 19:43 136 DF6NM Op32
GE Markus,
What was
it?:)
73
Andrey
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