CHC i93 / i90 / X7 RTK Setup: LandStar 8 NTRIP

Set up CHC i93, i90, i76, i73, and X7 receivers with RTKdata NTRIP in LandStar 8. Choose receiver or controller internet, enable GGA, and reach RTK Fix.

The CHC i93, i90, i76, i73, and X7 are professional GNSS receivers by CHC Navigation (CHCNAV). The i93 and i90 are flagship models featuring built-in 4G modems, IMU tilt compensation, and multi-constellation tracking. The i76, i73, and X7 are mid-range receivers sharing the same NTRIP workflow. All receivers are configured through LandStar 8 field software running on an Android controller or the CHC LT700/LT800 tablet.

Requirements

• CHC i93, i90, i76, i73, or X7 powered on with clear sky visibility

• LandStar 8 v3.0+ on an Android controller or CHC LT700/LT800 tablet

• Internet connection via the receiver's internal 4G modem (SIM card — i93/i90) or the controller's cellular/Wi-Fi connection

• RTKdata.com account with active RTK credentials (username starting with rtk and password from your RTK dashboard)

• Survey pole with CHC adapter

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Step-by-step setup

1

Connect to the receiver

1. Power on your CHC receiver and wait for satellite tracking to begin (LED indicators confirm satellite lock).

2. Open LandStar 8 on your Android controller.

3. Go to Device > Connect > Device.

4. Select your CHC receiver from the Bluetooth device list and tap Connect.

5. LandStar 8 will display the receiver model and current status once connected.

2

Configure rover settings and datalink

1. In LandStar 8, go to Device > Connect > Device > Rover Settings (or navigate to the Rover configuration screen).

2. Set the Work Mode to Rover.

3. Under Datalink, select NTRIP.

4. Choose the internet source:

   • Receiver Internal Network — uses the receiver's built-in 4G modem (i93/i90 with SIM card inserted). Configure the APN for your carrier if prompted.

   • Controller Network — uses the Android controller's internet connection (phone hotspot or mobile data).

"Receiver Internal Network" vs "Controller Network" is the most common confusion point with CHC receivers. If your receiver does not have a SIM card or built-in modem (i76, i73, X7), you must select Controller Network. Selecting "Receiver Internal Network" on a receiver without a modem will fail silently.

3

Enter RTKdata.com NTRIP settings

Fill in the NTRIP connection fields. Select the tab for your region:

North America

• IP / Server Address: rtk.rtkdata.com

• IP fallback: 13.56.117.10

• Port: 2101

• Username / Password: From RTK Credentials in the internal dashboard (not website login)

• Mountpoint (ALL CAPS): AUTO

Europe

Australia

Type AUTO manually in all capital letters. Do not browse the mountpoint list — LandStar 8 may time out or return an incomplete list with large casters.

4

Verify GGA position sending

1. In the NTRIP settings, look for a Send GGA or Upload GGA option and make sure it is enabled.

2. GGA is not always on by default in LandStar 8 — you must verify this setting.

RTKdata requires GGA position data to select the nearest base station. Without GGA, the connection will succeed but no corrections will be delivered. Always verify this setting is enabled before starting your survey.

5

Start the RTK survey

1. Tap Apply or OK to save the rover configuration.

2. LandStar 8 will connect to the internet, then to the RTKdata NTRIP caster.

3. Watch the solution status: Single > Float > Fixed.

4. Once Fixed, you are ready to collect points, stake out, or run your survey workflow.

i93 / i90 tilt compensation

The i93 and i90 feature IMU-based tilt compensation. Once an RTK Fix is achieved, tilt compensation initializes after a brief walk calibration. You can then measure with the pole tilted without leveling. LandStar 8 displays the tilt angle and compensated position in real time.

Vertical reference (heights)

Heights from RTKdata.com are ellipsoidal, not orthometric (mean sea level). Configure a geoid model in LandStar 8 under your project coordinate system settings if your project requires orthometric heights.

Troubleshooting

Problem	Cause	Fix
No internet connection (Receiver Internal Network)	SIM card not active, APN misconfigured, or receiver has no modem	Verify the SIM card has data and the APN is correct. If using i76/i73/X7, switch to Controller Network — these models may not have a built-in modem.
No internet connection (Controller Network)	Controller has no data connection	Ensure your Android controller has mobile data or is connected to a Wi-Fi hotspot.
Selected wrong network source	"Receiver Internal Network" on a receiver without a modem	Switch to Controller Network in the Datalink settings.
Empty mountpoint list	Source table timeout or wrong host	Do not browse — type AUTO manually in all caps. Verify the host address is correct.
No corrections received	GGA sending disabled	Enable Send GGA / Upload GGA in the NTRIP settings. This is not always on by default in LandStar 8.
Stuck on Float	Poor sky conditions or far from base	Move to open sky. Check RTKdata base coverage at rtkdata.com.
Credentials rejected	Using website login instead of RTK credentials	Use the username (starting with rtk) and password from your RTK dashboard, not your website account.
NTRIP v2.0 features not available	LandStar 8 version too old	Update to LandStar 8 v3.0 or later for full NTRIP v2.0 support.

Tips and tricks

• i93 and i90 built-in 4G modems provide the most reliable connection — insert a SIM card and select Receiver Internal Network.

• i76, i73, and X7 users should use Controller Network and tether the controller to a phone hotspot or use the controller's cellular data.

• "Receiver Internal Network" vs "Controller Network" — remember: Internal = SIM card in the receiver, Controller = internet from your Android device.

• Update to LandStar 8 v3.0+ for NTRIP v2.0 support and improved connection stability.

• Save the rover configuration so your crew can reuse it across projects without reconfiguring.

• Check correction age in the LandStar 8 status display. Values above 5 seconds indicate an unstable internet link.

• Keep receiver firmware updated via CHC's firmware update tool to benefit from the latest RTK engine improvements.

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