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Re: RE: [Paparazzi-de =?ISO-8859-1?Q?vel] GPS problem?=


From: martin
Subject: Re: RE: [Paparazzi-de =?ISO-8859-1?Q?vel] GPS problem?=
Date: Fri, 24 Jul 2009 13:10:10 +0200 (CEST)

Hi,

> It could be that you haven't used the board in a while and the
capacitor
> on the GPS board (C77) has lost it's charge thus loosing the settings.
> The capacitor is charged when the GPS module is in operation. Keep it
> powered on for a while to re-charge it.

just to clarify - the huge 0,2F capacitor is there only to keep the
ephemerides in RAM and the realtime clock running for a couple of hours
after power off to short the re-aquire time after e.g. aircraft battery
change. The settings are to be saved in non-volatile flash memory of the
GPS receiver by setting "permanent" in the u-center.

Martin





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