locked DT explanation request


Alessandro Gorobey
 

I have installed JTAlert 2.50.0 on windows 10 pro italian 20H2 build 19042.928 without problems.

The UI with the new design is much better than in the previous version.
Compliments for new design !!!!

In Callsigns Window I have enabled "DT Median" and it is fix DT+1.0

I understand that is different from:
Settings-->Applications-->WSJT-X / JTDX
Highlight Band Activity DT values ......

My time is syncronized by NTP so I cannot understand this DT is referred to or calculated.
In the some period the DT of FT8 decodes of WSJTX is less than 1 S.

Thanks in advance

73 Sandro IW3RAB


Robert Lorenzini
 

NTP cannot account for the delays in your computer, you will need to "fudge"
the time. Mike has written such a program and BKTimesync (written by your
fellow countryman and others will adjust for this.

Bob - wd6dod

On 4/20/2021 9:08 AM, Alessandro Gorobey via groups.io wrote:
I have installed JTAlert 2.50.0 on windows 10 pro italian 20H2 build 19042.928 without problems.

The UI with the new design is much better than in the previous version.
Compliments for new design !!!!

In Callsigns Window I have enabled "DT Median" and it is fix DT+1.0

I understand that is different from:
Settings-->Applications-->WSJT-X / JTDX
Highlight Band Activity DT values ......

My time is syncronized by NTP so I cannot understand this DT is referred to or calculated.
In the some period the DT of FT8 decodes of WSJTX is less than 1 S.

Thanks in advance

73 Sandro IW3RAB


John VA3BOF
 

I use Dimension 4 (http://www.thinkman.com/dimension4/) on my PC to keep the time sync'ed.  Once I installed this software my timing issues have been resolved.

I did not know about BKTimesync.  I will give it a look.

You can check the current PC time with any web browser at https://time.is/

73,
John VA3BOF


On Tue, Apr 20, 2021 at 12:31 PM Robert Lorenzini <bob@...> wrote:
NTP cannot account for the delays in your computer, you will need to "fudge"
the time. Mike has written such a program and BKTimesync (written by your
fellow countryman and others will adjust for this.

Bob - wd6dod

On 4/20/2021 9:08 AM, Alessandro Gorobey via groups.io wrote:
I have installed JTAlert 2.50.0 on windows 10 pro italian 20H2 build 19042.928 without problems.

The UI with the new design is much better than in the previous version.
Compliments for new design !!!!

In Callsigns Window I have enabled "DT Median" and it is fix DT+1.0

I understand that is different from:
Settings-->Applications-->WSJT-X / JTDX
Highlight Band Activity DT values ......

My time is syncronized by NTP so I cannot understand this DT is referred to or calculated.
In the some period the DT of FT8 decodes of WSJTX is less than 1 S.

Thanks in advance

73 Sandro IW3RAB


HamApps Support (VK3AMA)
 

On 21/04/2021 2:08 am, Alessandro Gorobey via groups.io wrote:
My time is syncronized by NTP so I cannot understand this DT is referred to or calculated.
In the some period the DT of FT8 decodes of WSJTX is less than 1 S.

Thanks in advance

73 Sandro IW3RAB

The DT shown in the Callsigns window status bar is a median calculation of the DT values of the incoming decodes. It is calculated over time using a reasonable number of samples to give a meaningful result. The number of samples and the time period are automatically adjusted taking into consideration how busy the band is. Hover the mouse over the DT value, the resulting tooltip will show how many samples were used and the time duration in calculating the DT.

de Laurie VK3AMA


Alessandro Gorobey
 

Hi Laurie,
thanks for the quick response, but the value is always +1,0 (one comma zero) and never change.

now my clock is off 0.294ms and there is over 20 decodes per cycle

last 100 DT are
 -2.2  -1.0  -0.6  -0.6  -0.6  -0.4  -0.2  -0.2  -0.2  -0.2  -0.1  -0.1  -0.1  -0.1  -0.1  -0.1  -0.0   0.0   0.0  -0.0  -0.0   0.0   0.0   0.0   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.2   0.2   0.2   0.2   0.2   0.2   0.2   0.2   0.2   0.3   0.3   0.3   0.3   0.3   0.3   0.4   0.4   0.5   0.6   0.6   0.6   0.6   0.7   0.7   0.8   0.8   0.8   0.9   0.9   1.0   1.2

the media give me a value of about 0.1 as expected

Compliments again


73 Sandro IW3RAB




HamApps Support (VK3AMA)
 

On 21/04/2021 8:57 am, Alessandro Gorobey via groups.io wrote:
thanks for the quick response, but the value is always +1,0 (one comma zero) and never change.

now my clock is off 0.294ms and there is over 20 decodes per cycle

last 100 DT are
 -2.2  -1.0  -0.6  -0.6  -0.6  -0.4  -0.2  -0.2  -0.2  -0.2  -0.1  -0.1  -0.1  -0.1  -0.1  -0.1  -0.0   0.0   0.0  -0.0  -0.0   0.0   0.0   0.0   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.1   0.2   0.2   0.2   0.2   0.2   0.2   0.2   0.2   0.2   0.3   0.3   0.3   0.3   0.3   0.3   0.4   0.4   0.5   0.6   0.6   0.6   0.6   0.7   0.7   0.8   0.8   0.8   0.9   0.9   1.0   1.2

the media give me a value of about 0.1 as expected

Compliments again


73 Sandro IW3RAB

RRR, I'll take a closer look at the code.
Please use the "Help" -> "Contact Support" menu, on the main JTAlert window, to send me your JTAlert files for analysis.

de Laurie VK3AMA


Alessandro Gorobey
 

Hi Laurie,
thanks for the quick solution

I can confirm that version 2.50.1 work well also in italian locale

Compliments again

73 Sandro IW3RAB