Practical guidance on RTK issues and setup notes for agriculture, surveying, and drone RTK workflows.
No RTK?
Quick checks to diagnose missing RTK corrections.
Goal: find why you have no RTK. Answer the questions below. If you get stuck, contact support with a photo of your RTK status screen.
Do you have a GPS/GNSS position?
If the receiver has no position, RTK cannot initialise.
Is RTK / high-accuracy unlocked and selected?
Many displays can show GPS but won’t do RTK unless RTK is enabled/licensed and the correct correction source is selected.
Do you have mobile data (4G) in the tractor?
RTK corrections via NTRIP need a live internet connection.
Is the NTRIP client connected?
Look for “Connected” and check you’re pointing to the RTK Solutions caster.
Check your NTRIP settings
Most “No RTK” issues are incorrect caster/port/username/password or the wrong mountpoint.
Are RTCM corrections arriving?
If corrections are coming in, you should see RTCM messages / correction age changing. As a rule: correction age should be under ~5–10 seconds.
What does the accuracy state show?
If you have corrections but won’t go to FIX, it’s usually sky view, antenna/cabling, wrong setup, or the machine is moving during initialisation.
FLOAT only: are you stationary with clear sky view?
Stop for 2–3 minutes in an open area. Trees, buildings, and cabling/antenna issues are the common causes.
Check antenna + cabling
Inspect roof antenna, connectors, water ingress, and any extension leads. If you can, try a known-good antenna/cable.
Are you using the correct correction source?
Some machines default to OEM correction services (e.g., SF‑RTK/RTX) instead of NTRIP RTK. Make sure “NTRIP / Internet RTK” is selected.
No GPS position. Check roof antenna, receiver power, and cabling. If the display cannot get GPS at all, that’s an equipment issue rather than corrections.
RTK not enabled/selected. Enable RTK/high-accuracy and select NTRIP/Internet RTK as the correction source. If your machine needs an RTK unlock/licence, you’ll need that activating first.
No mobile data. Check SIM/APN, signal, roaming, and account status. If the SIM works in a phone but not the modem, the modem/APN settings need correcting.
You need your NTRIP login details. Use the credentials from your welcome email / portal. If you can’t find them, contact support and we’ll resend.
NTRIP still won’t connect. Recheck caster/port, username/password (case sensitive), mountpoint, and whether the modem firewall/VPN is blocking port 2101. If you’re on a corporate SIM, ask the provider to unblock NTRIP traffic.
No RTCM corrections received. If NTRIP shows “connected” but there’s no RTCM, the mountpoint is wrong, the receiver isn’t sending GGA when required, or the correction stream is being blocked.
RTK drops out. This is usually intermittent mobile signal, loose antenna connection, or power issues to the modem/receiver. Check correction age spikes and power supply stability.
Switch to NTRIP/Internet RTK. If you were on an OEM correction service (e.g., SF‑RTK/RTX), switch the correction source to NTRIP and enter your RTK Solutions caster settings.
Contact support. Send a photo of your RTK/NTRIP status screen and we’ll tell you exactly what’s wrong.
