> 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/survey-receivers/stonex-s980a-s900a-s850a-s800a-s700a.md).

# Stonex S980A / S900A / S850A / S800A / S700A

Connect a Stonex S980A, S900A, S850A, S800A or S700A to RTK Premium corrections over NTRIP using Cube-a: caster settings and the steps to a fixed solution.

These steps connect a Stonex S980A / S900A / S850A / S800A / S700A to the Premium Positioning correction network over NTRIP, using Cube-a. 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=stonex-s980a-s900a-s850a-s800a-s700a) to get your credentials.
* Cube-a.
* 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=stonex-s980a-s900a-s850a-s800a-s700a#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. Power on and wait for satellites: Switch on your Stonex receiver outdoors with a clear view of the sky and wait for it to track satellites. On the controller (Android phone or data collector), make sure mobile data or Wi-Fi is on if you'll route corrections through the phone, then open Cube-a.
2. Connect Cube-a to the receiver over Bluetooth: Go to Device > Communication. Set Device Type to 'Stonex GNSS' and Communication Mode to 'Bluetooth', tap 'Search', pick your receiver from the list (Bluetooth name usually matches the serial), and tap 'Connect' (tap 'pair' if prompted). (On some firmware you can use Wi-Fi: Communication Mode 'WIFI', connect to the receiver's hotspot.)
3. Open Rover working mode: Go to Device > Working Mode > Rover to open the 'Rover mode settings' screen - where you set the correction (data link) source. Leave Cut-off angle at its default unless told otherwise.
4. Choose the data link: In the 'Data Link' section, open the 'Communication Mode' dropdown. To use your phone's internet, choose 'Phone Network'. To use a SIM in the receiver, choose 'Internal Network'. Both send the same caster request; pick whichever has internet. (Wording varies by version - look for the network/internet option, not Radio or L-band.)
5. Set the connection protocol to NTRIP: Tap into the chosen data link to open its settings (Phone Network → the 'Bluetooth Data Link' screen; Internal Network → 'Rover network settings'). Under 'Connect Mode', select 'NTRIP'.
6. Enter the caster address and port: In 'CORS Settings', set the IP/host to rtkpremium.xyz and the Port to 2101. To save it, tap the '...' icon next to CORS Settings and add a custom entry (e.g. 'Premium Positioning'); otherwise type host and port directly. Protocol stays NTRIP.
7. Enter your own NTRIP username and password: In 'CORS Account', type the User and Password from your welcome email - unique to your account, case-sensitive. Do not share or guess; if you don't have them, contact support.
8. Load the mount point list from the caster: With host, port and credentials entered, fetch the available mount points (source table) - a 'Get access point' / 'Get mountpoint' button or the dropdown/refresh next to the MountPoint field. Cube-a connects and downloads the list.
9. Select the COMMON mount point: In the MountPoint field, select COMMON (type it in capitals if not shown) - the correction stream Premium Positioning provides.
10. Make sure GGA position is being sent: NTRIP casters need your approximate position. Ensure GGA upload is enabled - 'Internal Network' has a 'GGA Upload Interval(s)' value (default 5s is fine) and an 'Automatically connect to network' toggle. If no corrections arrive, check this first.
11. Apply and start the connection: Confirm the data link screen with 'OK' (or 'Start' on the Bluetooth Data Link screen), then on 'Rover mode settings' tap 'Apply' to switch the receiver into rover mode. Optionally tap 'Save to Configurations' first to reload these settings next time.
12. Confirm a Fixed solution: Watch the status progress Single/Autonomous → Float → Fixed. Verify the link under Device > Data Link Status ('Connected to server', signal level, GGA upload interval). Once Fixed (commonly green), you have cm-level RTK. If it stays Single/Float, recheck credentials, that MountPoint is COMMON, that the phone/SIM has internet, and that GGA sending is on.

### Steps for S900A / S850A / S700A with Cube-a (formerly SurvCE)

1. Power up with clear sky: Take the Stonex receiver (S900A / S850A / S700A) outside with an open view of the sky, away from buildings and trees. Power it on and give it a minute or two to start tracking satellites.
2. Open Cube-a and connect: Launch Cube-a, go to the Tool (or Config) menu and tap Connect. Choose your receiver model, set the connection to Bluetooth, search, select your receiver's serial number and pair. Confirm it shows Connected. (On older SurvCE: Equip → GPS Rover.)
3. Open Working Mode → Rover: From the Tool menu open Working Mode and choose Rover. This is where the data link and NTRIP settings live.
4. Set the Data Link: Set the Data Link. For a receiver without its own SIM, choose the option that routes corrections through the controller's internet - typically 'Phone Internet', 'Controller Network' or 'PDA Network'. If the receiver has a built-in 4G modem and SIM, choose 'Receiver Network' (Internal GSM) and enter the APN.
5. Choose NTRIP protocol: Set the protocol / connection type to NTRIP (sometimes 'NTRIP Client', or Connection Mode = NTRIP) so Cube-a pulls RTCM corrections from an internet caster rather than a radio.
6. Add the caster (server + port): Create or edit an NTRIP connection profile and enter Server / Host / IP: rtkpremium.xyz and Port: 2101. If the field expects an IP, you can still type the domain rtkpremium.xyz - Cube-a resolves it.
7. Enter YOUR NTRIP credentials: In User Name and Password type the personal NTRIP login from your Premium Positioning welcome email - unique to your account. The caster requires authentication.
8. Retrieve the source table: Tap the control that fetches mountpoints - usually 'Get Source Table', 'Source Table', 'Get Access Point', or a refresh/list icon next to the mountpoint field. Cube-a downloads the list of available streams.
9. Select mountpoint COMMON: From the source table / Access Point list select COMMON. If the list doesn't populate, type COMMON manually (capitals) and double-check the host, port and credentials.
10. Enable position upload (GGA): Make sure 'Send GGA' / 'Send NMEA' is enabled - a network/VRS caster needs your approximate position to send the correct corrections. Most Cube-a versions enable this automatically for NTRIP.
11. Apply and confirm connection: Tap OK / Apply / Connect to save and start the data link. Cube-a shows the NTRIP connection active and a rising count of received correction bytes. If it fails, recheck server, port, mountpoint and credentials.
12. Verify a Fixed solution: Return to the Survey screen and watch the status progress Single (Autonomous) → Float → Fixed, typically within seconds to a minute or two. Confirm it reads Fixed and the latency/age stays low (a few seconds) before surveying.

### If the fix will not hold

Corrections can run through the receiver's SIM ('Internal Network') or the phone's connection ('Phone Network') - choose whichever has internet. Menu/button names vary slightly between Cube-a versions and models (S700A/S800A/S980A) - match the equivalent option. Steps based on the Stonex Cube-a 4.0 field software manual. On older SurvCE the path is Equip → GPS Rover → RTK tab, with the data-link device set to the data collector's internet and the network type set to NTRIP; the caster host, port, credentials and COMMON mountpoint are entered the same way. If you don't reach Fixed: confirm internet on the controller/SIM, re-fetch the source table, and verify host/port/mountpoint.

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