ComNav T300 / N3

These steps connect a ComNav T300 / N3 to the Premium Positioning correction network over NTRIP, using Compass / SurvStar (Android). 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 on the customer portal.

• Compass / SurvStar (Android).

• A working internet connection on the controller or phone.

• 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. Power on and pair the receiver: Turn on the ComNav T300/N3 and enable Bluetooth on your Android controller. Ensure clear sky and the receiver fixed on the pole.

2. Open the field software: Launch Compass or SurvStar and open/create your job. NTRIP settings live under the Device (or Communication) and Survey/Config menus.

3. Connect over Bluetooth: Go to Device > Communication (or Connect). Set Device type to ComNav, mode to Bluetooth, scan, select your T300/N3 by serial number, and Connect. Wording varies slightly by app version.

4. Set work mode to Rover: Open the Rover / Work Mode setup (sometimes 'RTK work mode' with a 'Change work mode' button) and select Rover (in some firmware 'Auto Rover').

5. Set the Datalink to network/internet: Set Datalink to use the internet - the controller's internet (phone/network datalink) or the receiver's internal network/SIM. In ComNav terms this is shown as 'Rover Ntrip/IP'.

6. Choose NTRIP protocol: Set the protocol/connection type to NTRIP (not TCP/IP direct or radio). If asked for a version, NTRIP 1.0 is a safe default.

7. Open the NTRIP / Datalink configuration: Add or edit an NTRIP profile (e.g. tap ADD in the Datalink Config screen) to enter the caster address, port, credentials, and mountpoint.

8. Enter the Premium Positioning caster: Server/Host (IP or domain): rtkpremium.xyz - Port: 2101 - Protocol: NTRIP. If a Mountpoint field shows now you can set COMMON, but it's easier to pick it from the source table next.

9. Enter YOUR NTRIP username and password: Type the username/password from your Premium Positioning welcome email - unique to your account, case-sensitive; do not use anyone else's.

10. Retrieve the source table: Tap Get / Get List / Source List (sometimes 'Download Source Table') to pull the mountpoints. A successful retrieval confirms address, port and credentials are correct.

11. Select the COMMON mountpoint: From the source list select COMMON, confirm/OK. The receiver begins requesting RTK corrections.

12. Connect and start receiving corrections: Confirm/Apply the datalink. The app shows the link connected and RTCM data arriving; the data age/latency counts low single-digit seconds.

13. Confirm a Fixed solution: Watch the status progress Single/Autonomous → Float → Fixed. Begin measuring only once it reads Fixed with low data age and cm-level precision.

If the fix will not hold

Names differ between Compass and SurvStar and across versions - match by purpose (connect, Rover, datalink/NTRIP, source list, mountpoint, Fixed). If you can't reach Fixed: verify internet, re-check credentials (case-sensitive), confirm the source table loads, select COMMON, and ensure clear sky within coverage.

For more, see RTK corrections troubleshooting and Fix inconsistent RTK accuracy on site.

Need help

Support is available 24/7. Include your receiver model, the mountpoint, the solution status, and the correction age when you get in touch.