General

Use this page to set the general receiver settings.

Select Receiver Configuration / General.

 

Operation Mode – Choose between Base, Moving base, Heading, and Rover modes.Choose between Base or Rover modes.

  • Base – Provides base station functionality. The Motion is set to Static.

  • Moving Base – Provides Moving Base functionality. The Motion is set to Kinematic and a CMR output is configured on Serial 3. To reconfigure this, select I/O Configuration / Port Configuration. The RTK Mode is set to Low Latency to allow for the use of static CMR or RTCM corrections. However, you can change it to Synchronous if you use Moving Base CMR corrections from another Moving Base receiver.

    The internal radio does not support transport of Moving Base CMR corrections.

  • Heading – Provides Heading functionality. Requires CMR input from a Moving Base receiver. The Motion is set to Kinematic and the RTK Mode is set to Synchronous. If CMR corrections are available from a Moving Base receiver, the Heading (True North) is displayed on the receiver front panel.

  • Rover – Provides rover functionality. The Motion is set to Kinematic.

IonoGuard™ – From v6.28/5.68, there are now three modes for IonoGuard. The goal of these changes is to make IonoGuard available by default in situations where it provides value with minimal risks. For safety, IonoGuard needs to be disabled if required. The current primary risk is very poor base station locations.

The following modes are available:

  • Disabled – The receiver will not perform any IonoGuard processing.

  • Enabled without Fallback Mode – [Default] If the base station has IonoGuard enabled, ionospheric disturbance detection runs at the base, and the disturbance information is sent to the rover receiver via RTCM/CMRx messages. If the base station does not have IonoGuard enabled, then IonoGuard is disabled at the rover.

  • Enabled with Fallback Mode – If the base station does not have IonoGuard enabled, the rover will perform ionospheric disturbance detection when the data received from the base station does not include IonoGuard messages.

Fallback mode allows the rover to calculate IonoGuard positions without receiving IonoGuard messages from the base. With Enable without Fallback mode, IonoGuard positions are only calculated if the base is transmitting IonoGuard messages. To prevent spikes in the radio throughput due to IonoGuard messaging, messages are transmitted over several epochs to smooth the bandwidth usage.

On the Satellites - Tracking Information page, an icon shows the level of ionosphere disturbance.

For information, see Trimble IonoGuard: protecting RTK GNSS from ionospheric disturbances and How Trimble IonoGuard Secures GNSS Precision Amid Rising Solar Activity on trimble.com.

NOTES – From version 6.40:

    IonoGuard. The IonoGuard feature has been enhanced when using the RTK single-baseline technique. When IonoGuard is enabled and is used under nominal conditions, improvements have been made to reduce degradations in position quality. This results in significant rover positioning improvements in situations where the base station is affected by multipath. Minor improvements have also been made to gradient estimation.

    VRS. Enhancements have been made to the scaling of ionospheric gradient data to improve rover performance during periods of high ionospheric activity.

Antenna LNA Voltage – Low or High.

Internal Measurement Rate – 5 Hz, 10 Hz, 20 Hz.