GPS External antenna detect issue

Daniel Willmann daniel at
Thu May 1 03:36:07 CEST 2008

Hi Andy,

On Tue, 29 Apr 2008 13:45:07 +0100
Andy Green <andy at> wrote:

> Hash: SHA1
> Somebody in the thread at some point said:
> Hi Daniel -
> | That might explain some of the things I've been seeing here, bad
> | reception with the internal GPS antenna and maybe the failure of the
> | antenna switch on my v4 was a result of this floating (or the
> tolerance | just changed resulting in really bad reception).
> In that conf call yesterday it was also mentioned that you were using
> external antenna, and things went much better with that.
> I tried to get an external antenna today but nobody sells them around
> here, so I ordered one for tomorrow.
> What was your experience when you used this?

Yeah, GPS with external antenna was generally better that with
internal. Not much, but noticeably. It could be though, that the
external antenna has an overall better reception than the internal one.

> In fact, what about your experience when you didn't use it... did you
> ever find yourself unable to get any signal for some period even in a
> situation where you had OK signal before?

Hmm, tough to say. When I wasn't pointing the antenna directly at the
sky it was somewhat of a gamble when it would synchronise, get a
fix, ...
Other than that it was pretty consistent.

Daniel Willmann
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