Hi Stefan
02r2702 seems to have cured the nasty rattle at COM Port release
here.
Non de-code checks done here today on JT9-2, it looks to me that
your TX / RX need to be stable over the 2min period to less than +-
0.78Hz, pretty critical for rigs.
Eddie G3ZJO
On 30/10/2012 13:30, Stefan Schäfer wrote:
Hi Eddie, LF,
Am 30.10.2012 11:25, schrieb g3zjo:
Hi Stefan
I found the lack / loss of decodes annoying, one cause was
slight
frequency drift in my transverter, WSPR is not effected but
JT9-2 is.
I feel there were other periods of unexplained non de-codes too.
Was it you who mentioned the burst at the end of the signal. I
was
hearing a tuneful diddle at the end of G3XIZ transmission, I
hear a
burst of distorted rattle on my own signal.
Eddie
No, it was DF6NM who mentioned the burst at the end but i saw it
as
well. It was part of the end of my signal.
With the new version things became a bit better. The initial
crashes
didn't happen any more for me. As i assume, this is probably due
to the
decoder that has to much work to do in a 1 minute period when the
range
is set to center+-50 Hz and if the CPU power is relatively low or
other
task have to be performed to the same time. When reducing the
range to
e.g. +-10 Hz there was no problem on my XP PC (512 MB RAM) (no
decodes
though). On my Win7 PC (32 bit, 4GB RAM) there were no problems
and i
got successful decodes.
Probably there have to be some improvements on the decoder. We all
confirmed that these problems are not present in WSPR, so Joe may
already know what the culprit is.
It's one of the first releases of the software so we obviously
have to
be patient for some more time.
On request of DU1GM i will transmit JT9-30, beginning arround
15 UTC
on 137.44 kHz (+- a few Hz), full power!
73, Stefan/DK7FC
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