Hello All,
I read in last months some problems about time and minimum frequency
decoding.
Now my considerations.
I am not a unix guru, I work a lot the previous century on several
"proprietary" sys V.
So try some experiments.
I backup the file ALL.TXT, and when it change location I append to old.
Now my operations.
Working on W7/64 run C:\JTSDK-QT\jtsdk-qtenv.bat
In the windows paste the follow command:
set ALL_TXT=%USERPROFILE%\AppData\Local\WSJT-X\ALL.TXT
Now the experiments:
grep -c " # " %ALL_TXT%
My response is 377083, the number of lines where JT65 was decoded
Now time problem. The NTP protocol can maintain synchronized the clock
with a reference, but normally on a good quality laptop have a very poor
quality clock. Looking at the results of NTP I can see drift of 100mS in
12 hours from shutdown and startup.
Yes, after few minutes it is synchronized, but see the results of:
grep " CQ " %ALL_TXT% | grep -v "Transmitting" | awk "{print $3}" | sort
-n | uniq -c
In my test "near" all transmission are from dT 0 to 1, but the results
are from -3.9 to 9.3
Now the frequency experiment. I use a transformer coupled audio, so is
impossible to decode from 0 Hz.
The transformer normally used are for phone/modem use, so if the program
have decoded under 100 Hz the signals whose very strong.
grep -e " # " -e " @ " %ALL_TXT% | awk "{if ($4<150 )print $4}" | sort
-n | uniq -c
The following give you the audio response of your system in 100 hz
segments. The second number is the final frequency, that start 100 Hz
before.
grep -e " # " -e " @ " %ALL_TXT% | awk "{print int($4/100)*100+100}" |
sort -n | uniq -c
Now, for those who fell asleep also a signal test.
For JT65
grep " # " %ALL_TXT% | awk "{print $2}" | sort -n -r | uniq -c
For JT9
grep " @ " %ALL_TXT% | awk "{print $2}" | sort -n -r | uniq -c
I report only JT65:
58605 -1
15435 -2
15926 -3
15945 -4
16060 -5
15765 -6
15683 -7
15195 -8
15574 -9
15317 -10
15415 -11
15375 -12
15535 -13
15710 -14
16152 -15
16439 -16
16629 -17
16416 -18
15587 -19
13437 -20
9959 -21
5952 -22
3032 -23
1242 -24
454 -25
133 -26
53 -27
45 -28
25 -29
25 -30
With this signals of -1 (QRO != QRP) sometimes is hard to work.
Other fun searches:
grep " K1JT " %ALL_TXT%
(too big pileup for my balcony antenna)
grep -c "string" %ALL_TXT%
give some results
" DX " 4652
"HYBRID" 130
" TU " 3765
"PHOTO" 24
"SKYPE" 1
"OOO" 1
" CQ VK[0-9]" 188
grep " CQ " %ALL_TXT% | awk "{print $7 \" \" $8}" | sort | uniq -c
|sort -n -r
give count of cq listen from callsign an the location (DANGER the list
can be long)
With this tools you can search, convert (eg. CSV), analyze your
receptions and transmissions.
Now, if you are not sleeping remember to backup this file
73, Sandro IW3RAB
"Unix is user-friendly. It's just very selective about who its friends are."
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