[time-nuts] why some GPS get lock and others don't
jimlux
jimlux at earthlink.net
Sun Oct 29 21:16:43 EDT 2017
Finally got all 4 GPS receivers to lock, but still, I find that not all
of them keep the lock.
Turns out, theoretically identical receivers (e.g. bought at the same
time from Parallax) aren't.. There's two different antenna styles, and
obviously, they work differently.
When tested side by side in my precision outdoor test range (see
attached picture) I found that the ones where the patch on the top comes
closer to the edge work worse than the ones with the smaller patch.
Fascinating. Not surprising once I identified the difference.
Now I'll have to see what the C/No reported by each one is.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: antennas.jpg
Type: image/jpeg
Size: 109165 bytes
Desc: not available
URL: <http://www.febo.com/pipermail/time-nuts/attachments/20171029/5271bf45/attachment-0002.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 4beagles.jpg
Type: image/jpeg
Size: 157506 bytes
Desc: not available
URL: <http://www.febo.com/pipermail/time-nuts/attachments/20171029/5271bf45/attachment-0003.jpg>
More information about the time-nuts
mailing list