OK Wolf, thanks for the explanation.
I also read that is is possible to rectify the audio signal and LPF it.
Then it is a H and L signal that can be applied to the toggle XOR gate.
But how can i force the gui program to do that? In the DOS program it
is done with this K paramater that must be enabled or so. But is there
a chance to do it in the gui program? The program should then send a
tone for H and no-tone for L.
And is there a chance to implement this mode in SpecLab? :-) Then, the
samplerate drift and offset problems would be history and we could even
choose a very narrow frequency offset limit :-)
73, Stefan/DK7FC
PS: PA works again...
Am 31.01.2012 17:45, schrieb wolf_dl4yhf:
Hi Stefan,
So the question is
if i can use the WOLF gui program to get what i want? Some things can
be changed in the config file but don't know how i can get the RS232 to
generate the toggle signal for the phase shift :-/
Simple: You cannot drive the RS-232 with the WOLF user interface.
Producing a precisely timed digital signal which isn't (by coincidence)
a multiple of the serial port's baudrate is almost impossible with
windoze. Reason: Windows uses buffering between the application and the
ports hardware. Sending a byte to the serial port API doesn't mean it
is placed in the UART's transmit shift register. It may get there in a
microsecond, or in a millisecond, or even dozens of milliseconds later.
Thus the RS-232 port can only be used for RX/TX switching, but not for
the digital modulation itself (at least not without an extra hardware;
PIC etc etc).
Cheers,
Wolf .
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