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moitessier hat - AIS reception varies by power source
Hi All,

Got my Moitessier hat from the post office this morning, and all setup and tested.

Initial results have been very promising - working really nicely so far, got good GPS lock without external antenna, and quite a bit of AIS data with a fairly small antenna.

One thing I've found is that the reception / general range I seem to get with the AIS seems to change quite significantly depending on the power source.

That is to say - when I use mains with a standard pi transformer, I get significantly better range and reception than when running off 12v->USB power.

I was trying to think about possible reasons for this:
- Could it be that there is more fluctuation in voltage on the 12v circuit?
- Could it be related to grounding? 

Or...any other thoughts?

It was quite pronounced and noticeable - i'll see if i have some screenshots with openCPN on my phone for comparison.

I've attached a quick picture of the setup.

[Image: tWzndJfTYVEwo6JPrq9CXp61jgaV1a2ydGGsJTgW...4-h1390-no]

Messages In This Thread
moitessier hat - AIS reception varies by power source - by jaziniho - 2018-08-04, 07:50 PM

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