On 25/11/2018 00:44, Dana Myers wrote:
On 11/24/2018 4:14 PM, Bill Somerville wrote:
The only way to check the sensitivity of the 75-bit and 77-bit
decoders on air is to do a controlled test.
Exactly. A *controlled* test, that is reproducible. Let me introduce
an invaluable
tool for this:
http://www.moetronix.com/ae4jy/pathsim.htm
Perhaps I'll tinker with some FT8 simulations a bit later this
evening, if someone
doesn't beat me to it.
73,
Dana K6JQ
Hi Dana,
it looks like that application can only process 8kHz sample rate .WAV
files so it cannot be used to directly process WSJT-X saved .WAV files.
That is a shame as it is easy to hook up a pair of WSJT-X instances
back to back with a digital sound card loopback (stereo mix device for
example) to record suitable .WAV files sans interference. You can
resample the 12kHz WSJT-X .WAV files down to 8kHz (there are several
tools that can do that) degrade them then resample back to 12kHz as a
work around.
73
Bill
G4WJS.
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