> For the complete documentation index, see [llms.txt](https://docs.premium-positioning.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.premium-positioning.com/guides/oem-boards-and-integration/u-blox-zed-f9p-via-u-center.md).

# u-blox ZED-F9P via u-center

Connect a u-blox ZED-F9P to RTK Premium corrections over NTRIP using u-center on Windows: caster settings and the steps to a fixed solution.

These steps connect an u-blox ZED-F9P via u-center (PC) to the Premium Positioning correction network over NTRIP, using u-blox u-center (Windows). They assume you already have your NTRIP credentials.

### Before you start

* Your NTRIP username and password, from your Premium Positioning welcome email or your account in the XYZ Platform.
* No account yet? Start a [14-day free trial](https://www.premium-positioning.com/start-14-day-free-trial?utm_source=docs\&utm_medium=referral\&utm_campaign=docs\&utm_content=u-blox-zed-f9p-via-u-center) to get your credentials.
* u-blox u-center (Windows).
* A working internet connection on the controller or phone.
* No phone or hotspot in the field? If your controller or receiver takes a SIM, Premium Positioning [IoT SIMs](https://www.premium-positioning.com/products?utm_source=docs\&utm_medium=referral\&utm_campaign=docs\&utm_content=u-blox-zed-f9p-via-u-center#iot-sims) give it its own data connection.
* A clear view of the sky at the point you are measuring.

### Network settings

These are the same for every Premium Positioning customer. Only your username and password are unique to you.

* Server or host: rtkpremium.xyz
* Port: 2101
* Mountpoint: COMMON
* Protocol: NTRIP

### Steps

1. Use classic u-center: On Windows, install and open the classic u-center (the one for F9 receivers). u-blox also ships u-center 2, but for the ZED-F9P use classic u-center, which has the built-in NTRIP Client used here. Labels below are from classic u-center; match by meaning if yours differs.
2. Connect antenna and receiver: Connect the GNSS antenna (clear, open sky) to the ZED-F9P, then plug the receiver into the PC via USB. Windows assigns a COM port; check Device Manager > Ports (COM & LPT) if unsure.
3. Open the COM port in u-center: Select the receiver's COM port from the toolbar dropdown (or Receiver > Connection). Live data should update. The ZED-F9P USB port typically uses 38400 baud if asked.
4. Confirm a basic position fix: Open View > Docking Windows > Data. Confirm the receiver is tracking satellites and Fix Mode shows 3D before adding corrections.
5. Open the NTRIP Client dialog: Menu bar > Receiver > NTRIP Client to open the configuration dialog. (If not there, look under the Receiver menu for an NTRIP / NTRIP Client entry.)
6. Enter the caster address and port: Set the NTRIP caster/server address to rtkpremium.xyz and the Port to 2101. Leave the protocol as standard NTRIP.
7. Enter YOUR NTRIP username and password: Type the NTRIP username and password from your welcome email into the Username and Password fields - unique to your account; do not use anyone else's. If you can't find them, contact support.
8. Update the source table: Click Update source table (or Update / Get source table). u-center contacts the caster and downloads the mountpoints; wait a few seconds.
9. Select the COMMON mountpoint: From the NTRIP mount point dropdown (or the Mount point details button), select COMMON - the mountpoint serving network corrections to all customers.
10. Apply and connect: Click OK to apply. u-center connects to the caster and streams RTCM corrections into the ZED-F9P.
11. Confirm corrections are flowing: The NTRIP client icon at the bottom of the u-center window turns green when corrections are received. If it stays red/grey, re-check address, port, mountpoint, credentials, and that the antenna has open sky.
12. Watch Fix Mode reach RTK FIXED: In the Data view watch Fix Mode move 3D → 3D/DGNSS → RTK FLOAT → RTK FIXED. FIXED (cm-level) confirms the receiver is fully connected to the caster and working.

### If the fix will not hold

Use classic u-center (not u-center 2) for the ZED-F9P. A clear sky view and stable internet are required; reaching FLOAT then FIXED can take from seconds to a couple of minutes. Menu/button labels vary slightly by u-center version - match by function.

For more, see [RTK corrections troubleshooting](/troubleshooting/rtk-corrections-troubleshooting.md) and [Inconsistent RTK accuracy on site](/troubleshooting/inconsistent-rtk-accuracy-on-site.md).

### Need help

Support runs on business days from 09:00 CET to 17:00 ET. Contact us at <info@premium-positioning.com> or +31 85 0606 338, and include your receiver model, the mountpoint, the solution status, and the correction age.

Last updated: 11 October 2026