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Unknown Digital Mode
Ken Davis
Member ✭✭
Can anyone ID the digital mode in the passband on the video?
Thank you
Ken
W0KRD
https://www.youtube.com/watch?v=Z3utfvlJEoQ
Thank you
Ken
W0KRD
https://www.youtube.com/watch?v=Z3utfvlJEoQ
0
Answers
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jt65
0 -
Thanks Larry - Thats about the only mode DM780 does not have.
73 :-)0 -
JT-65, you normally would use WSJT-X to decode that .. And your station computer clock has to be within 1 second, alternated one minute receive, one minute transmit. Evens or odds..
A good link http://hflink.com/jt65/
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That's actually multiple stations transmitting simultaneously. One of the requirements of JT-modes is time accuracy. So several stations come up together over the span of the bandpass.0
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If my system sets time automatically to the internet time, would that get me within the 1 second window?0
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Yep !
Tune to WWV and listen to confirm it . .
Cheers!
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Yes, as long as you are using a program that sets time periodically instead of once-in-a-blue-moon like the built-in Windows mechanism.
I just checked and this laptop, last synchronized approximately 9 hours ago, was over 2.7 seconds off.
I use NixieClock from ClockVault.com:
http://www.clockvault.com/clocks/nixiehowto.htm
...mainly because I wrote it many years ago.
73,
Bob, K8RC1 -
No. You should use a utility such as meinberg which continuously pulls the clock back to the correct time.0
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oh well - guess I have a really good motherboard clock . . my time has always been within the second.
Cheers again !
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And will never have. Yes, there's a backstory here.0
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Actually, it depends more on how many interrupts your CPU is servicing.
Updating the clock is still a low priority.
Almost anything works better than Windows (especially Win10) in this area.
BTW, I'm not selling anything.
It's freeware.0 -
I prefer a true NTP client which doesn't cause big steps in the clock. Instead it speeds up and slows down the clock as needed. It's like driving. The SNTP clients are like veering off course and jerking your steering wheel back to the middle of the road whereas a real ntp client continuously monitors the road and continuously keeps you in a straight line.1
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I use NetTime, and it works really well.0
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Thanks everyone for the help
Ken
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I think you also have what I have in places. It looks like you have a power supply that is noisy and causing that swirly back and forth S curve you see right before the JT signals start.
I have these in many places and they drive me nutz. I'm trying to find and **** them. Check out this nasty video of 20m before I killed the primary offender:
https://dl.dropboxusercontent.com/u/7578983/20mNoise10192015.mp4
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