CHCNAV i83 / i73
These steps connect a CHCNAV i83 / i73 to the Premium Positioning correction network over NTRIP, using LandStar 7. 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.
LandStar 7.
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
Power up and connect the receiver: Turn on your CHCNAV i83 / i73, open LandStar 7, and go to Config > Connect (Bluetooth). Select your receiver and connect. Wait until LandStar reports it connected before continuing.
Get the controller online: NTRIP arrives over the internet. If the receiver uses its own SIM/modem you'll set the APN later; if corrections come via the controller, make sure the controller has working mobile-data or Wi-Fi now.
Open the work mode list: Go to Config > Work Mode. Tap New to create a new work mode (you can save and reuse it next time).
Set the receiver as a rover: Switch RTK on, then set Work Mode to Auto Rover so the receiver listens for incoming corrections rather than broadcasting them.
Choose the network data link: Set Datalink to Receiver Network if the receiver's own modem/SIM dials out, or to the controller-internet option ('Phone Internet', 'Controller Internet' or 'PDA Network' by version) if it uses the controller's connection. Pick the network/internet option, not radio.
Select the NTRIP protocol: Set Protocol to NTRIP. On some LandStar 7 builds this is labelled CORS - CORS and NTRIP are the same network-correction protocol here, so choose whichever your screen shows.
Enter the caster address: In the server/CORS fields, enter Host (IP/Address): rtkpremium.xyz and Port: 2101. If you selected Receiver Network with a SIM, tap the APN set button to enter your SIM's APN.
Enter YOUR NTRIP credentials: Enter the User name and Password for your NTRIP account - the personal credentials from your welcome email, unique to you. Do not share them or use anyone else's.
Download the source table: Tap Download (also 'Get' / 'Source list' by version) to retrieve the source table. LandStar contacts rtkpremium.xyz with your credentials and lists the available mount points.
Select the COMMON mount point: From the source table, select COMMON - the correction stream all Premium Positioning customers use.
Confirm RTCM message settings: If LandStar shows RTCM 1021 - 1027 (datum transformation) toggles, leave them at the default. Switch these off only if the mount point doesn't provide them; for COMMON keep defaults unless support says otherwise.
Save and accept the work mode: Tap Save. At 'Please Set a Name for The New Mode' enter a name (e.g. PP-COMMON) and OK, then OK at 'Create Mode Successfully'. Select the new mode and tap Accept.
Confirm the CORS/NTRIP details: LandStar shows a CORS information screen - re-check Host, Port and the COMMON mount point, then tap OK.
Verify a Fixed solution: The solution status progresses Single → Float → Fixed (the status LED flashes as it locks). On the survey/status screen confirm it reads Fixed before measuring. If it stays Single/Float, recheck internet, caster Host/Port, your credentials, and that COMMON is selected.
If the fix will not hold
Menu/button labels differ slightly between LandStar 7 versions (and LandStar 8): the protocol may read NTRIP or CORS, the source-table button Download/Get/Source, and the controller-internet data link Phone Internet/Controller Internet/PDA Network. Choose the closest network/internet option.
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.
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