Re: MAX-M8Q GPS lock problem
Digital cameras are a huge source of EMI to desense GPS receivers. I always try to keep about 6 to 10 feet of isolation between GPS trackers and camera payloads. Aluminum shielding on the top or bottom of the camera payload is also a good idea.
By identical sister do you mean the other board also uses the MAX-8Q or does it use some other version of the MAX series? In the case of the MAX-8Q if you don't send it the command to only use the US GPS constellation, it will also use the Chinese and Russian GPS sytems and will access more satellites. That might help.
- Bill WB8ELK
I use the MAX-7Q and MAX-8Q almost exclusively now. However, for extreme EMI environments such as coexisting next to an ATV transmitter with digital cameras, then I use the Trimble Copernicus module as it is a lot more impervious to EMI effects. I still offer them every once in awhile for folks using ATV on gliders or RC aircraft as well as ATV payload on balloons.
From: Michael <mw@...>
To: GPSL <GPSL@groups.io>
Sent: Sat, Mar 23, 2019 11:58 am
Subject: Re: [GPSL] MAX-M8Q GPS lock problem
Looks like you have an EMI issue, try wrapping the cameras with aluminum foil with just a small hole for the lens as small as you can get it without interfering with the view. Most likely your cameras are using a frequency that has a harmonic on the GPS frequency and with a GPS having say 165db of sensitivity, you pretty much can not get far enough away on a flight string to realize some impact, but more shielding and space will likely help.
On Mar 23, 2019, at 11:08 AM, Zack Clobes W0ZC <zclobes@...> wrote: