Both of mine have external antennas on them. It looks like this may be quite a big problem. I will have another word with lh see what's going on. I don't think we will have much joy going forward bearing in mind it has been a problem since Christmas.Would anyone have an opportunity to test an external antenna at the AGI-4 receiver? Since it seems no support from Topcon coming, it would be useful to eliminate the internal antenna performance from the list of possible issues. Just guessing based on the greenstar products that had to be changed because of sensitivity to 5G interference.
I find it unlikely that 5G interference would be an issue in the middle of a large field with clear sky view but who knows if a critical number of GPS satellites appear at a very low elevation?
Another guess would be Topcon sensitivity to GPS modernisation. No idea if the new signals at higher power too could confuse it. Nothing that could be done with this really, a SW update might solve it in the best case but seems the last SW update was released years ago.
If Topcon wants to stay in the business and continue selling new products, they would need to come with a clear message. I might purchase their new GNSS receiver but not if they show zero support for a product that was sold new just a few years ago (less than 5?). Gives zero confidence to their new products.
My backup plan is to use my AgOpenGPS GNSS receiver as a temporary source for the Topcon/AGCO screen. It should be very simple if terrain compensation was ignored. At the AgOpenGPS group, some experts are working on a solution to even integrate terrain compensation and gyro and provide a generic corrected NMEA stream. A less than £200 solution to replace the AGI-4 completely. Really a pity if/when AOG gives better support for their "competitors" than the actual product manufacturers can provide.