To start an RTX survey

  1. Start the survey using the RTK survey style you configured for RTX. See Configuring an RTX survey.

    When data from the RTX correction service is being received via:

    • RTX (SV signals), the radio icon changes to an RTX icon , and RTX appears on the status line.
    • an Internet connection, the network connection icon appears.
  2. To shorten the convergence time using RTX QuickStart:
    1. Tap QStart in the RTX status screen.

      QuickStart is not available in RTX surveys when IMU tilt compensation is enabled.

    2. Tap Start. The Start button appears only when RTX positions are being calculated.
    3. Set up the receiver on the known point and then enter the details for the point, or select it from the list.

      QuickStart points must be able to be expressed in terms of the Global reference datum. This means that they have either been previously measured using the CenterPoint RTX correction service, or that there is a current precisely computed RTX to RTK offset in the job, or that the job has been site calibrated in terms of RTX.

  3. Wait for convergence.

    Convergence can take up to 30 minutes in typical conditions. RTX QuickStart typically converges in less than 5 minutes.

    When the message Convergence has been gained appears, you can begin surveying

    To view the RTX status screen, in an RTX (SV) survey, tap . In an RTX (Internet) survey, tap RTX status in the Instrument menu.

  4. If you are using a receiver with IMU tilt compensation, align the IMU.

  5. Measure or stake out points.

 

  • Although the RTX rover solution may have converged, it may not yet meet the precision tolerances for point measurement. You may need to remain at a point longer to meet the precision tolerances specified, as the RTX rover solution should converge more when the rover is in static mode. Precisions for surveys using the Trimble Centerpoint RTX service are very sensitive to environmental conditions such as multipath, ionosphere scintillation, and particularly tropospheric conditions and tree canopy.
  • To change the precision level at which convergence is acceptable, clear the Auto tolerance check box in the Rover options screen and enter the values that you want to use.