[time-nuts] FTS125 GPS Module

ExpertEngineer expertengineer at live.co.uk
Thu Jun 28 14:44:36 UTC 2012


Hello,

Has anyone had a play with the FTS125 GPS reference from Connor Winfield.

I have one question on it.

I notice if the unit is locked to GPS and the antenna is removed, the unit goes to holdover which is correct.

If the antenna is replaced quickly (within minutes) then the module changes back from holdover to GPS lock, which is what I would expect.

However, if the antenna is left out for hours, then re-connected, the unit never goes back to GPS locked and remains in holdover, this despite 8 or more satellites being received.

I have tested multiple boards and they all do this.  This is on the CTV TXCO version.  I haven't tested the COO version yet.

Anyone else seen this.  Any fax?

Best Regards
 
Martyn
 


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