I have managed to nail a signal with my new DIY loran-C reciver:
http://phk.freebsd.dk/misc/Loran2/proof.png
Trace 4 (cyan) is the raw antenna signal
Trace 3 (red) is the integrated (averaged) signal, as output by the
receiver using the D/A converter.
The receiver consists of only four hardware parts:
A Olimex ADuc-P7026 prototyping board.
A TAPR clockblock
My funky old $20 loop antenna: http://phk.freebsd.dk/loran-c/Antenna/
A small E1/T1 telco trafo for balancing the signal.
Everything else is software.
Obligatory picture of messy workbench:
http://phk.freebsd.dk/misc/Loran2/dsc_3327.jpg
Right now the software just integrates the first 900µs of the GRI,
one has to place the GRI manually over the signal, but getting
the my prototype software moved over so it can do that automatically
is next.
Poul-Henning
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED] | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
