Hi Olivier,
On 9/29/2020 1:31 PM, Olivier SCHMITT F4HTB wrote:
Hello dear all,
I have been using jt9 for a while to decode frames on my server.
I do like this.
Every 15s I use arecord to record 16bit wav frames with a sample rate of
12000hz.
Then I use jt9 -e ./ -a ./ -t ./ --fst4 200929_171645.wav
It works FT8, by adapting I also use it in wspr and FT4 but here in FST4
I cannot.
Attached is an example recording.
I'm not sure what would differ from FT8 other than the --fst4 flag from FT8?
Thanks in advance.
73 F4HTB Olivier
You need to tell the decoder the correct sequence length ("-p 15" for
your FST4-15 file) and lower and upper bounds for the frequency range to
be searched ("-L 600 -H 1400"). Most likely you also want to set the
maximum decoding depth ("-d 3").
Thus:
$ jt9 --fst4 -p 15 -L 600 -H 1400 -d 3 200929_171645.wav
EOF on input file 200929_171645.wav
171645 5 0.0 1386 ` CQ F5NWY JN38 0.559
<DecodeFinished> 0 1
The message "EOF on input file 200929_171645.wav" is produced because
your file has only 14.25 s of data, rather than the expected 15.0 s.
-- 73, Joe, K1JT
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