Agco/Topcon RTK GNSS not connecting

Baz65

Member
Location
Shropshire
Got a AGCO/Topcon AGI-4 works with EGNOS Geen correction and GNSS signal, turn it to RTK I get Green cell signal and Ntrip corrections but GNSS is red with 8 or 9 Satelites worked OK a couple of weeks ago when power-harrowing.
Have some satelites gone awol or something?
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
Turn engine off, let the computer shut right down. Then pull the fuse, it’s the only way to properly reboot the system. Turn back on and see what happens

Do you have a roving SIM card?

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Location
North
A roaming SIM should not make a difference if NTRIP corrections are coming fine as he says. As a new user it would be useful to state how the previous was verified though.

How far is the base or is it VRS?

Note that RTK fix needs good satellite visibility and no buildings or trees near by.
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
I asked about the roaming sim because I had issues last autumn. In this country BT have bought EE, Bt use the EE network. What they also did was to shut down 1 of the 2 signals (one for each company) that they were transmitting for ntrip and whatever else it’s used for. I think it was the original EE signal. This was a problem for roving SIM cards, the system was looking for a signal that wasn’t there and wouldn’t lock on to any other. My Fendt dealer had this issue with a number of tractors including mine. It was driving me crazy I would be fine and then loose all signal, repeated pulling of the fuse to reset the system was annoying. A new updated SIM card solved the problem. It’s been spot on ever since.

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Location
North
I asked about the roaming sim because I had issues last autumn. In this country BT have bought EE, Bt use the EE network. What they also did was to shut down 1 of the 2 signals (one for each company) that they were transmitting for ntrip and whatever else it’s used for. I think it was the original EE signal. This was a problem for roving SIM cards, the system was looking for a signal that wasn’t there and wouldn’t lock on to any other. My Fendt dealer had this issue with a number of tractors including mine. It was driving me crazy I would be fine and then loose all signal, repeated pulling of the fuse to reset the system was annoying. A new updated SIM card solved the problem. It’s been spot on ever since.

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Sounds like a realistic scenario but in this case you would fail to receive NTRIP correction data when the problem appears. At least I understood that Baz65 had NTRIP data coming fine.

Anyway, very useful to raise all issues that may be relevant.
 

Baz65

Member
Location
Shropshire
A roaming SIM should not make a difference if NTRIP corrections are coming fine as he says. As a new user it would be useful to state how the previous was verified though.

How far is the base or is it VRS?

Note that RTK fix needs good satellite visibility and no buildings or trees near by.
I am use VRS from RTKFIX they do a daily subscription which worked OK 3 weeks ago had 2.5cm accuracy. I have 11GPS and 7 Glonass, HDOP 0.65
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
It’s behind the panel on the right hand side of the cab. 5amp about 3rd group up. Id of each fuse on the sticker inside the cover and the manual

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Location
North
It must be fuse #13 for the GNSS receiver on the roof. This is circuit 30 power (permanent). The receiver also has circuit 15 power (switched) from fuse #8 but turning ignition off and pulling F13 makes a full power reset if needed.
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
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It’s the top fuse in the group of 3 5amp together

With a bit of luck it will reset the system and get you going. If not probably a call to the dealer required

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Baz65

Member
Location
Shropshire
Still no joy works fine on EGNOS, switch to RTK cell connects to NTRIP OK but GNSS stays Red with 11 GPS and & 7 Glonass satelites visable. Pulled fuses unplugged receiver from socket on roof. Might try a different SIM card as suggested.
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
Still no joy works fine on EGNOS, switch to RTK cell connects to NTRIP OK but GNSS stays Red with 11 GPS and & 7 Glonass satelites visable. Pulled fuses unplugged receiver from socket on roof. Might try a different SIM card as suggested.
Has to be worth a try

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Baz65

Member
Location
Shropshire
Just ordered one that's on EE the other one was on O2 and Three so will see if it was the sim in a couple of days time if it arrives on time.
 
Location
North
Still no joy works fine on EGNOS, switch to RTK cell connects to NTRIP OK but GNSS stays Red with 11 GPS and & 7 Glonass satelites visable. Pulled fuses unplugged receiver from socket on roof. Might try a different SIM card as suggested.
Please clarify what "connects to NTRIP OK" means? Do you see an up-to-date correction data stream, latency around zero to two seconds? The same mount point as at the time it was working? A bit difficult to check the RTCM stream from the tractor but could try with a laptop app.

Does not harm to test another SIM card but it is a pain to swap the card. If the RTCM stream is coming fine with low latency, a different SIM would not help.
 

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