On Wed, 7 Aug 2019, Mike Cook wrote:

Hi,
It’s possibly on the way out. I don’t have an 18x but can get badformat showing if I pull the antenna on a NMEA source. Another possibility, it could be that you have a GPS jammer in the vicinity. If you run your cv command in a loopover a day you may see some pattern in the badformat counts. Mike



Hey Mike,

Thanks for the reply. If I can find some free time I'm going to get graphing going. I also take your point on the badformat pattern.

GPS jammer I had not thought of. Of course anything is possible, but I live in a subdivision in the midwest USA - and I think most of my neighbors are the "use the ISP's router" and "call Geek Squad" types. I will keep a lookout for suspicious unmarked vans bristling with antennae though :)

I think I might bite the $70 USD bullet and just get a new one to try out. Worst case I will have a backup unit.

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Brandon Applegate - CCIE 10273
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