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Post by 7l4iou on Jan 7, 2024 20:39:44 GMT
Hi All,
Thank you for releasing the new samples.
I have tried the 32bit audio sample files uploaded on Jan 6.
down load from Home/samples/32bit_audio/FT8
"230322_144345.wav"
The version of JTDX used v2.2160-32A-rc4.
PC is Windows 11 Pro (64) i5-8400
The result,
when AGCc off, there were 102 decodes.
with AGCc on 103 decodes.
Could you please tell me how many signals are recorded in this file?
tnx & 73, Hisami 7L4IOU
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Post by Arvo ES1JA on Jan 7, 2024 21:21:59 GMT
Files are real live recordings from March 22 2023 , recorded with AGC off with SunSDR using TCI audio. How many signals there, nobody knows.I get from those files usually 104-105 decodes.
73! Arvo ES1JA
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Post by 7l4iou on Jan 7, 2024 22:37:08 GMT
Arvo-san,
Many thanks.
I understand.
I will look for two more.
tnx & 73, Hisami 7L4IOU
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Post by 7l4iou on Jan 8, 2024 4:21:00 GMT
Arvo-san,
I changed the FT8 Decoder parameter.
FT8thread = Auto
FT8 decoding cycles = 3
QSO RX freq scensitivity = high
decoder sensitivity = use subpass
AGCc = ON
The result of these combinations is
Lag=+8.37/106
I remembered my previous test.
It seems backwards, but when I reduced the FT8threads, the number of decodes increased.
So, I set FT8thread to 1.
The result found
Lag=+14.20/107
This too long decoding time makes it impractical.
However, when specializing in the number of decodes,
setting the thread to 1 seems promising.
tnx & 73, Hisami 7L4IOU
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Post by Arvo ES1JA on Jan 8, 2024 6:50:41 GMT
I use threads=5 cycles=2 rx freq sensitivity=medium ( high can be used in very quiet environment) decoder sensitivity=use low thresholds ( it is much faster than subpass but usually same count of decodes)
cpu Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz os linux
This gives for me 99% periods negative Lag value, this is most important thing, have Lag negative for everyday working, losing maybe couple of decodes is nothing.
73! Arvo ES1JA
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Post by 7l4iou on Jan 8, 2024 19:23:11 GMT
Arvo-san, Thanks for the advice. With the recommended settings, the Lag is now within 3 second with 104 decode. It seems this PC is not enough. btw, this is a screenshot of the 107 decode. tnx agn & 73, Hisami  |
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Post by Arvo ES1JA on Jan 8, 2024 19:32:25 GMT
Reduce bandwidth , make waterfall narrower currently 4100 Hz 3300 should be enough and set Start to 100 Hz, you shold see some 15 % less decoding time.
Arvo
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Post by 7l4iou on Jan 10, 2024 6:37:12 GMT
Arvo-san,
Thanks for the attention.
I usually set up about 100 to 3000 Hz.
This time, I wanted to find a lot.
so spread it as wide as I could.
73, Hisami 7L4IOU
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Post by K7GQ on Feb 17, 2024 20:15:34 GMT
Arvo
Are the WAV files compatible between JTDX and WSJT-X? I've tried compare the decoding capability between the two and each seems to only work with the WAV samples provided with each program.
TNX
Harry
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Post by Arvo ES1JA on Feb 17, 2024 21:39:42 GMT
16bit audio files are compatible, wsjt-x does not have 32bit audio.
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