That clears up something that has bothered me on JT65. Many times
someone will complain about someone overdriving, but the signal appeared
to be OK to me. It happens frequently. Now I think the "complainer" is
probably receiving the station much more strongly than I am and it is
overdriving his JT65 software. The signal is weaker for me and my
software is not being overdriven. The transmitted signal is indeed clean.
Thanks for the insight.
Eric
KE6US
On 9/25/2013 9:13 AM, Sverre Holm (LA3ZA) wrote:
As your post indicates, the splattering of JT65 signals has most likely
nothing to do with your transmitter and setup. It is more likely to be due
to the specifics of the JT65 display/decoding algorithm than anything else.
I have done spectral estimation for some 30+ years and it reminds me very
much of the phenomenon called sidelobe leakage. I have commented on that in
my blog:
Overmodulated JT65 on HF?
<http://la3za.blogspot.no/2013/04/overmodulated-jt65-on-hf.html>
WB4SON wrote
Yesterday I received an email from a ham a few thousand miles away asking
me to clean up my signal -- I was running JT65 at the time, and he saw my
signal decode on his rig in a half-dozen spots across the waterfall.
....
Later that night a nearby ham was nice
enough to run a spectral analysis on my signal and found it looked clean
as
well.
-----
Sverre, LA3ZA
K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications:
http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html
--
View this message in context:
http://elecraft.365791.n2.nabble.com/P3-Feature-Request-Transmit-sampling-tp7579177p7579228.html
Sent from the Elecraft mailing list archive at Nabble.com.
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