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Re: GPS behaviour very inconsistent


"David Atkins"
 

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My thanks to Tony and Phil for publishing pictures of their builds, and to everyone else, like Keith,?who has given details of their construction. All of your experiences are helping me plan my own installation.
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Both of my units are currently languishing in a drawer, pending Hans' return and his words of wisdom. The U2's USP for me was that it could be portable and self-contained. I wanted the ability to set up a WSPR beacon in the middle of nowhere without having to take a load of other equipment. The U2 should work out its location, sort out its clock to WSPR standards, and start to talk. Mine have both got the location sorted, but the lack of pps functionality means that neither the location nor the timing are usable. I'm confident that we shall see a solution soon. Sadly, I have a trip to the Highlands on Wednesday that will most likely be too premature for that.
In the meantime, I have shack-bound WSPR capabilities that I can go back to using. But I was so looking forward to being portable ;-(
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A naive question. What did the Beta-testers use that gave them success? Is there a way I can copy that?
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Best Wishes
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David G8XBZ

From: QRPLabs@... [mailto:QRPLabs@...] On Behalf Of Keith Maton
Sent: 26 May 2013 10:39
To: QRPLabs@...
Subject: Re: [QRPLabs] GPS behaviour very inconsistent

I have one further update regarding the initial time setting from the GPS using the Adafruit.

If it's all powered off and I start the GPS and the U2 at the same time, the U2 will give a slightly incorrect time depending on how long it takes the GPS to lock.

So if the GPS takes six seconds to find a lock the time displayed by the U2 will be six seconds slow.

Simply inverting and re-inverting the GPS settings cause that error to be corrected.

I hope this is helpful.

73 Keith, G6NHU
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