[GPS_Standard] Unlock latch....

[Bert, VE2ZAZ]

Hi Hermann,

Indeed, Arie answered it right. To make the outputs and the LED turn off
when the FLL is unlocked or disabled, change the O parameter to "If Locked".

Thanks for your alarm latch clear suggestion. It should not be too hard to
implement such a feature. It will go in my list of possible features for
version 2 of the firmware. I also have another nice-to-have feature on this
list: the ability to initialize the PIC at startup to support either a 10MHz
or a 5 MHz OCXO. I got this request from someone who wanted to be able to
change his OCXO without having to purchase 2 PICs ...

The reason I did not implement a clear button is because the system should
not normally transition to the Unlocked state if the parameters are properly
set (unless, of course, something is going wrong). Other than during warm up
after a power down, the system should stay in Locked or Holdover state. If
the alarm latch is set, this requires investigation before clearing the
alarm latch. But I agree that after warm up, it would be nice just to
depress a button...

Cheers,

Bert, VE2ZAZ

----- Original Message -----
From: "f5vkq" <f5vkq at wanadoo.fr>
To: <GPS_Standard at mailman.qth.net>
Sent: Thursday, January 25, 2007 5:16 AM
Subject: [GPS_Standard] Unlock latch....


Hello the group de Hermann the German in France, F5VKQ.



Several people over her have been building this excellent GPS-OCXO
controller, also myself.

Thanks to the author for the very good programming job he did!!!



Like Gil, F5CAU reported, the OUTPUT Led is always on....and I have
one more suggestion.



When the unit is ready for prolonged use and sitting in the corner of
the laboratory,  I want my PC or Laptop back for other things.

This means (so far I know now) that if the unit is going into UNLOCK
for one time the UNLOCK Led stays on for ever and the only possibility
to extinguish the LED is to connect again a PC to the unit and clear
the state by the alarm-latch clear button. Right ?



A momentary switch, read in by the program, on one of the left over
input pins of the PIC could solve the problem.

This needs some minor program change, I guess.

What do you think Bertrand ???

Would this be possible, or I am wrong ??



73 de Hermann  F5VKQ







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