| Timing |
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| Accurate timing is a
necessity when any WSJT mode although timing with JT6M is not as critical but it is wise to be
accurate to within 1 second. This can be achieved by using 3rd party programs such as Dimension
4 or Tardis which synchronize your PC's clock for Windows-based operating systems. Typically
these will monitor your Internet connection and automatically adjust your PC's clock when you're
online at an interval you specify. This is by using time servers which usually have their very
own atomic clocks, or are directly connected to other machines that do. |
| The Dimension 4 screenshot (below right) shows
time synchronisation set to every 60 minutes from time server ntp2.uu.net. This update time interval
will probably suit most users unless you have a very poor PC clock. |
The authors time sync is set to 60 min's and produces the
following sync information :
 The
PC's clock had drifted 5mS in 1 hour so setting any less sync period would be pointless. |
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| Windows XP settings. |
| If you are using Windows XP then you may need to disable XP's own internet time service.
Deselect "Automatically synchronize with an Internet time server" |
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The following explains the preferred method :
- Go to Control Panel - Date and Time - Internet Time tab.
- Make sure automatically synchronize with an internet time server is NOT checked.
- Go to Control Panel - Admin Tools - Services
- In Services select WINDOWS TIME.
- Right click for Properties. Change STARTUP TYPE to DISABLE
- Then click SERVICE STATUS = STOP and then click OK
- Finally reboot your PC to ensure changes take place. Dimension 4 should now sync to time server.
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Vista and Windows 7 settings.
- Disable Windows Internet Time.
- Right click on Dimension 4 Icon
and click on Properties.
- Check "Run in XP compatability mode SP3".
- Check "Run as Administrator" box.
- Reboot your PC.
- Now run Dimension 4 again and it should now sync to time server.
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