Lady Heather - Learning Holdover

[BUR]

I'm running Lady Heather 6.14 B on Windows 10 64bit without any problem.
The GPSDO is a BG7TBL with Oscillioquarz inside (Star4)
I don’t know what the indication "Learning Holdover" in Yellow means.
Will this message turn in sometime (weeks) to green od it's just an information what the GPSDO is doing?
Any help would be appreciated.
Rolf

[Gandalf_Sr]

I'm no time nut but this article does explain what holdover is and why it's necessary.

I am guessing that Lady Heather 'remembers' when the time was most accurate and can learn and use that information to influence the OCXO when there are fewer satellites or the angle of view is restricted.

[BUR]

Thank you. I'm aware of what holdover is for, but i don’t know what the message on the display of Lady Heather means.
Finally, I let it go for several days how knows. perhaps in some days we will see a green message... 
Rolf

[jpb]

I have two Oscilloquartz Star 4+ GPSDOs, they start off with yellow "Learning holdover" when first powered on and then transition to "holdover perf good" in green when they have learned sufficient information.
It takes a while and it is different from the position hold mode transition (where it has learned the co-ordinates and can go into timing mode proper). It seems to take several days for my setup and one transitioned quicker than the other even though both were turned on at the same time.

They are basically learning the value of parameters to model changes with temperature and drift so that they can continue to make adjustments if the GPS signal is lost. For the average amateur user it doesn't matter much as the GPS signal is almost never lost and if it was the frequency reference is probably not critical. It matters much more for telecoms providers who have to meet particular standards for holdover.

[BUR]

Perfect
Thank you, I will be patient enough
Rolf

[Gandalf_Sr]

So does my GPSDO run differently when I don't have Lady Heather connected or is the stuff I see in the LH display just a presenattion of what the GPSDO is doing?  I ask because I leave the GPSDO plugged in by the PC gets powered down most of the time.

[texaspyro]

So does my GPSDO run differently when I don't have Lady Heather connected or is the stuff I see in the LH display just a presenattion of what the GPSDO is doing?

Heather just reports what the GPSDO is sending.  The only time it affects the GPSDO is when you change a device setting.

Also I think the holdover learning time is 24 hours...

[Electro Fan]

I'm running Lady Heather 6.14 B on Windows 10 64bit without any problem.
The GPSDO is a BG7TBL with Oscillioquarz inside (Star4)
I don’t know what the indication "Learning Holdover" in Yellow means.
Will this message turn in sometime (weeks) to green od it's just an information what the GPSDO is doing?
Any help would be appreciated.
Rolf

What model (date?) BG7TBL do you have?  Are you sure it has an Oscilloquartz and is a Star4?  Thx

[BUR]

I'm 100% certain that I have a STAR4 inside. Outside no date but just engraved what should be inside. Opening the Box, we can see the star4 Board and the 8663-XS
Rolf

[jpb]

I'm 100% certain that I have a STAR4 inside. Outside no date but just engraved what should be inside. Opening the Box, we can see the star4 Board and the 8663-XS
Rolf

I think if it is Star4+ then this is a GPSDO in its own right so is not a BG7TBL which is a different controller that sometimes has Oscilloquartz 8664 OCXOs in.

Mine are Star4 GPSDOs and not BG7TBL.

Does yours say BG7TBL on the outside?

[BUR]

ok Mine is a BG7TBL with a OEM Board inside

[BUR]

After  some days it turned to a ok green message