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Author Topic: JT65 Advice  (Read 5726 times)
WX2S
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Posts: 690




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« Reply #15 on: August 15, 2012, 04:58:41 AM »

Make sure your PC clock is spot-on.  Several 3rd-party applications for Windows (no idea what's available for Macs) as the stock Windows NTP service is inadequate.  [Linux NTP clients "just works"]
Hmmmm... the Setup Guide mentions http://www.thinkman.com/dimension4/ .
Quote from: Dimension 4 page
Dimension 4 uses a low level internet protocol, called SNTP, to connect with special purpose Internet Time Servers that have been keeping the rest of the web on-time for the last 20+ years.
Now, I've got my PC syncing time from one of the NIST time servers every 15 minutes. Why isn't that adequate? Is the Windows SNTP client broken?

Regards, -WX2S.
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73, - Steve WX2S.
I subscribe to the DX Code of Conduct. http://dx-code.org/
KG6MZS
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Posts: 476




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« Reply #16 on: August 15, 2012, 09:46:42 AM »

Quote
Like some of these folks think they are RF engineers once they get a license.
Fred

We are.  Just not very good ones Smiley
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NK7Z
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Posts: 737


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« Reply #17 on: August 15, 2012, 10:10:03 AM »

Beyond the 49 second thingy, for start and stops of transmissions in JT65, why is JT65 so time dependent?  I know it is, as I can see shifts in the waterfall when my time is reset in the middle of a receive cycle.
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Thanks,
Dave
For reviews and setups see: http://www.nk7z.net
W5DQ
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Posts: 1209


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« Reply #18 on: August 15, 2012, 02:24:03 PM »

Beyond the 49 second thingy, for start and stops of transmissions in JT65, why is JT65 so time dependent?  I know it is, as I can see shifts in the waterfall when my time is reset in the middle of a receive cycle.

Unless you're time sync is way off, I would think you'd not be able to see a shift? How often does your time get synced and can you tell what the average shift might be? Just curious.

I use 'TIMESYNC' application in Windows XP and have a 5 minute time sync cycle. I haven't noticed any shifting in the waterfall with this setup?

Gene W5DQ
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Gene W5DQ
Ridgecrest, CA - DM15dp
www.radioroom.org
WA3YAY
Member

Posts: 26




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« Reply #19 on: September 01, 2012, 01:48:36 PM »

Quote
Like some of these folks think they are RF engineers once they get a license.
Fred

I'm a better RF engineer than my wife  Grin
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