GPS died?

[readbueno]

Hi All, I have a similar problem.
   
   
This appears to be something to do with the GPS Antenna. The red GPS blinks without the antenna and with one antenna I get sat data, but no pps and with another diferent antenna, pps data, but no sat data.
Apart from this the board appears to function correctly and it updated firmware with no problem.
I would like to get active again, but without further information about why this is happening I can not just keep buying different GPS Antennas until I get one that works.
Thank you in advance.
Kindest regards,
Brian.1856 Vilaboa.

[mwaters]

Brian, have you tried doing a factory reset?

I'm fairly certain that you know about the proper placement of GPS antennas. That being said, where is your antenna? Could you move it?

[readbueno]

Hi All, I have a similar problem.


This appears to be something to do with the GPS Antenna. The red GPS blinks without the antenna and with one antenna I get sat data, but no pps and with another diferent antenna, pps data, but no sat data.
Apart from this the board appears to function correctly and it updated firmware with no problem.
I would like to get active again, but without further information about why this is happening I can not just keep buying different GPS Antennas until I get one that works.
Thank you in advance.
Kindest regards,
Brian.1856 Vilaboa.

Thanks Mike, Yes. I have tried resetting. The antennas were in the same place as the previous antenna and that worked ok.
I thought it was the actual GPS module, but that seems to work normally as long as no external antenna is plugged in.
It may be to do with the pre-amp in the antenna? Although it has 3.2 volts at the centre pin.
Brian.

[mwaters]

The center pin of the RG-6 coax should have at least 4 or 5 volts on it. Maybe you need to shorten it.

What is your voltage on the status page? That should be close to 5 VDC.

[readbueno]

The center pin of the RG-6 coax should have at least 4 or 5 volts on it. Maybe you need to shorten it.

What is your voltage on the status page? That should be close to 5 VDC.

Hi Again, The Coax on the GPS antenna is an unknown mini-coax and the output from the GPS module is only 3.2 volts.
The power supply is adjustable and it is set just where the CPU voltage measures 3.25 volts this is, on this board, about 5.1 volts.
The voltage at the e field pre-amp is the same more or less as the input voltage.
The GPS Pre-amp says 3 to 5 volts working, but it is limited by the GPS module itself.
What is more of interest is why something is causing the buffer over run, that does not permit both functions to happen at the same time? 
I have ordered the original cheapy eBay GPS antenna again, 3 weeks wait? As it did work until the landscaper weedwacked the cable!  
For the other two antennas that I got to replace that one, I went a little more up-market and neither of them appear to work?
This would normally point to the problem being somewhere else, but as far as I can tell the board is not showing any errors, except when a GPS antenna is plugged in.
Brian. 1856 Vilaboa
P.S. I see I have lost the station details at the server too. I have not tried to re-assign until I get something that works.

[Weather muurame]

How does your pps signal looks like ? Mine is like this and not good.

[mwaters]

... It may be to do with the pre-amp in the antenna? Although it has 3.2 volts at the centre pin.
Brian.

I see now. I understood this to mean the E-field preamp.

[readbueno]

... It may be to do with the pre-amp in the antenna? Although it has 3.2 volts at the centre pin.
Brian.

I see now. I understood this to mean the E-field preamp.

Yes, As far as I can tell nearly all these GPS antennas have a pre-amp, probably to overcome the losses in the crappy mini-coax?