Ctrlk
For the complete documentation index, see llms.txt. This page is also available as Markdown.

Trimble Catalyst DA1

These steps connect a Trimble Catalyst DA1 to the Premium Positioning correction network over NTRIP, using Trimble Mobile Manager (Android) + a GIS app. 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.

  • Trimble Mobile Manager (Android) + a GIS app.

  • 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. Check your Catalyst subscription tier: The DA1 is subscription-based, and achievable accuracy depends on the Catalyst subscription active on your Trimble ID. To use a custom NTRIP caster (your own/third-party corrections), you need a tier that permits custom/local corrections and cm-level (RTK) positioning. If unsure which tier you hold, check with Premium Positioning or your Trimble dealer. Tier names change over time, so this guide doesn't name a specific plan.

  2. Install the apps and power on the DA1: Install 'Trimble Mobile Manager' (TMM) and the 'Catalyst Service' app from Google Play, plus your GIS app (e.g. ArcGIS Field Maps or QField). Connect the DA1 to your phone/tablet and power it on. Make sure the device has mobile data or Wi-Fi, since NTRIP streams over the internet.

  3. Pair the DA1 over Bluetooth: Android Settings > Bluetooth, turn Bluetooth on, scan, tap the DA1 to pair. (Depending on DA1 connection type and TMM version, the Catalyst Service may detect it automatically - then skip manual pairing.)

  4. Open Trimble Mobile Manager and sign in: Launch TMM and log in with your Trimble ID (the account holding your Catalyst subscription). This is your own Trimble account - Premium Positioning doesn't provide it.

  5. Select the DA1 as the GNSS / position source: In TMM make sure 'DA1' is selected in the GNSS receiver type field and connect to it. The picker wording varies by version ('GNSS source', 'Position source', 'GNSS receiver type') - choose the option pointing TMM at the Catalyst/DA1 rather than the phone's internal GPS.

  6. Open Configuration: From TMM's main screen open 'Configuration' (the configuration/settings icon) - where the correction source and reference-frame settings live.

  7. Set the GNSS correction source to Custom local: In Configuration, change 'GNSS correction source' from 'Auto' to 'Custom local'. 'Auto' uses Trimble's built-in corrections; 'Custom local' points the DA1 at Premium Positioning's caster.

  8. Choose the NTRIP protocol: Under the custom correction settings set 'Protocol' to 'NTRIP' (the other option is typically 'Direct' - leave it on NTRIP).

  9. Enter the caster server and port: Server / URL: rtkpremium.xyz Port: 2101. TMM uses these to connect and download the mount point list.

  10. Enter YOUR NTRIP username and password: Set the corrections account Username and Password to your NTRIP credentials from your welcome email - unique to your account; do not share them. If a field reads 'if required', it is required for this caster.

  11. Select the COMMON mount point: After TMM connects, the mount point list (source table) appears. Select COMMON. If it doesn't load, re-check server, port, credentials and your internet connection.

  12. Set the reference frame: Choose the 'GNSS source reference frame' matching the corrections. If unsure, contact Premium Positioning for the correct frame, or select 'Auto'. (Reference-frame wording varies by TMM version.)

  13. Set TMM as the Android mock location app: To feed the cm position into a GIS app, Android must use TMM as its location provider. Enable Developer options (Settings > About phone > tap 'Build number' seven times), then Settings > System > Developer options > 'Select mock location app' > 'Trimble Mobile Manager'. Some GIS apps read the Catalyst position directly via TMM and don't need this. (Menu path varies by Android version.)

  14. Confirm RTK Fixed and start surveying: In TMM, confirm the receiver is streaming corrections and the solution reaches 'RTK Fixed' with a low, stable accuracy estimate - not Autonomous/DGPS/Float. Then open your GIS app; its position should reflect the DA1's cm-level location. If it stays Float/Autonomous, recheck COMMON, your credentials, the subscription tier, and that the DA1 has clear sky.

If the fix will not hold

The DA1 is subscription-based: you must hold a Catalyst tier that allows custom/third-party corrections and RTK accuracy, otherwise TMM connects but won't reach RTK Fixed. TMM menu/field labels differ slightly between versions and Android devices - named generically where wording varies. RTK Fixed needs clear sky and a live internet connection.

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.

PreviousTrimble BD992 / BX992 (OEM)
NextTrimble Catalyst DA2

Last updated

Was this helpful?