I've only switched the U2 off gps once to check the 20mhz clock setting anf the results scared me so I switched the gps back in straight away. The seconds were very random, jumping up in twos and stopping then jumping again? I guess this may be the problem then !
From: Tony Volpe To:[email protected] Sent: Monday, July 1, 2013 1:05
PM Subject: [QRPLabs] Re: U2 gps timing data
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How far out is the nominal 20MHZ clock setting from the actual oscillator frequency Andy? I can't see how the unit could go off time over a few minutes? My understanding is that it resorts to its own internal clock if the GPS loses lock. My UQ1 certainly did that. I have often observed the GPS board losing lock in my year long 24/7 operation of the UQ1. It might ?lose the satellites for ten minutes at a time (being indoors) and then regain it. Its time keeping remained well within bounds throughout its operation. Even with the system clock being set at the nominal value, the unit ought to keep time for many hours without getting outside the WSPR time parameters.?
