Base Kit Network Mode

David GNSS Receiver

The Tersus David is a cost-efficient, palm-sized GNSS receiver designed for surveying UAVs, AGVs, and agricultural applications. Working with an external GNSS antenna, the free Tersus Survey App and post-processing software, the David GNSS receiver is a low-cost solution for all survey applications, including real-time RTK positioning and data collection for PPK.

4GB on board an embedded multimedia card (eMMC) makes it easy to save data for post processing. The compact size, IP67-rated enclosure and external Bluetooth module alleviates most of the inconveniences encountered in field work.

  • Supports GPS L1/L2, GLONASS L1/L2, and BeiDou B1/B2

  • Supports 384 channels

  • Supports RTCM2.3/3.x, CMR, CMR+ corrections

  • Easy to connect an external powerful radio for long range

  • Solution update rate up to 10Hz

  • 20Hz raw measurement output for post processing

  • MicroSurvey FieldGenius supports Tersus David




Signal Tracking                     

GNSS                                          GPS L1/L2

                                                    GLONASS L1/L2

                                                    BeiDou B1/B2


Single Point Positioning Accuracy (RMS)

   - Horizontal                                    1.5m

   - Vertical                                         3.0m


   - Horizontal                                    10mm + 1ppm

   - Vertical                                         15mm + 1ppm


   - Horizontal                                    10mm + 1ppm

   - Vertical                                         15mm + 1ppm


C/A Code (zenith direction)            10cm

P Code (zenith direction)                 10cm

Carrier Phase (zenith direction)       1mm


Time to First Fix

   - Cold Start                          <50s

   - Warm Start                        <30s

Timing Accuracy (RMS)            20ns

Velocity Accuracy (RMS)           0.03m/s

Initialization (typical)              <10s

Initialization Reliability           >99.9%


Input Voltage                                  5V~12V DC

Power Consumption                       3.2W


Storage                                           4GB on-board eMMC Card

Correction                                       RTCM2.3/3.x, CMR, CMR+

Max. Update Rate                           20Hz


Serial Ports (DB-9 female)                RS232 x2

USB Port                                            USB 2.0 device x1


Size                                                    104 x 65 x 31mm

Weight                                               250g (David only)

                                                           360g (David + BT+PW/USB Cable)

Active Antenna Input Impedance   50Ω

Antenna Connector                          SMA female x1

COM Baud Rate                               Up to 921600bps

Operating Temperature                  -40℃ ~ +85℃

Dust- & Waterproof                           IP67

Optional Accessory

Battery                                              Battery bank

                                                          Customized battery

Software Support

Tersus Nuwa

MicroSurvey FieldGenius


In the Box

Base Kit Netowrk Mode includes

  • 1 x David GNSS receiver 

  • 1 x DC-2pin to USB Power Cable

  • 1 x COMM1-Bluetooth module 

  • 1 x COMM2-7pin to USB & DB9 Cable

  • 1 x USB Type A Female to USB (Micro+Type C) OTG cable 

  • 1 x DB9 Male to USB Type A Male converter cable

  • 1 x AX3702 GNSS antenna 

  • 1 x GNSS antenna connector

  • 1 x TNC-J to SMA cable 1.5m (GNSS antenna cable)

  • 1 x height measure accessory

  • 1 x wrench

  • 1 x warranty card

  • 1 x bracket for base

  • 1 x tape measure

  • 1 x carrying case

@ 2019 TECPHIL Geosolutions Co.

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