There is only 'one' Opera !
there is no other single carrier
on/off data system
Yes , Markus has designed
a secondary detector that acts as a
pattern recognition system , for best results ,
the qrg needs to be as stable as
possible , wspr uses 4 carriers , so
not suitable and conventional qrss has a
limited number of transitions
Opera sends 256 bits
in each tx cycle , which can be detected
earlier than the main decoder , that is
extracting the call from the received
data as opposed to pattern matching ,
'a software bombe'
Using the long Op coded tx
signal , now , gives a 3 way split ,
the 65 min tx time produces quite a
sizeable block of data to post-process
1... Normal decode with Op
software ------round -43 dB
2...qrss grabber trace as
line on qrg...... ??
3... correlation detection ....... -50 dB ??
With the advantage of 50% duty cycle
..
73-G,
