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Diamond Point International

Trimble BD920-W3G - Dual Frequency GPS/GLONASS Receiver With Integrated Communications

Speeds Development Of Mobile Positioning Applications

Trimble BD920-W3G - Dual Frequency Receiver With UTMS
Key Features
Multi frequency GNSS receiver
L1/L2/L5 GPS, L1/L2 GLONASS, E1/E5 Galileo
RS232, USB, CAN and ethernet interfacing
L1 RTK centimeter level position accuracy
Integrated Bluetooth/Wi-Fi/3G Modem
Proven Trimble Maxwell 6 technology
Evaluation kit available
-40°C to +85°C temperature operation


The Trimble BD920-W3G module has been designed for applications requiring centimeter accuracy in a compact package. By integrating wireless communications on the same module the task of receiving and transmitting data such as RTK corrections is greatly simplified. A single intuitive web interface allows a variety of use cases to be supported. In addition to GNSS base and rover setups with Wi-Fi or UMTS modem the module also allows simultaneous customer access to the internet.

Both GNSS and communication components are fully shielded. This design ensures the high quality signals are protected from the sources of EMI on the host platform. It also significantly reduces radiated emissions which speeds compliance certification and time to market.

Multi Constellation GNSS

The Trimble BD920-W3G supports both L1 and L2 frequencies from the GPS and GLONASS constellations plus the E1 frequency from Galileo. This delivers the quickest and most reliable RTK initializations for 1–2 centimeter positioning. For applications that do not require centimeter accuracy the BD920-W3G contains an advanced kalman filter PVT engine that delivers high accuracy GNSS, DGNSS or SBAS positions in the most challenging environments such as urban canyons. Different configurations of the module are available including single frequency RTK and GPS only. All features are password-upgradeable, allowing functionality to be upgraded as your requirements change. The receiver also supports Fault Detection and Exclusion ( FDE) and Receiver Autonomous Integrity Monitoring (RAIM) for safetycritical applications.

Demonstrated Performance

Industry professionals trust Trimble embedded positioning technologies as the core of their precision applications. With the latest Trimble-precise Maxwell™ 6 technology, the BD920-W3G provides assurance of long-term future-proofing and trouble-free operation. Moving the industry forward, the Trimble BD920-W3G redefines high-performance positioning:

  • On-board multipath mitigation
  • Proven low-elevation tracking technology
  • Dramatically improved RTK initialization

Flexible Interfacing

The Trimble BD920-W3G was designed for easy integration and rugged dependability. Customers benefit from the wireless communications and Ethernet connectivity available on the board, allowing high speed data transfer and configuration via standard web browsers. USB and RS-232 are also supported. Just like other Trimble embedded technologies, easy to use software commands simplify integration and reduce development times.


Product Specification

General220 Channels
Positioning SystemGPS: L1 C/A, L2E, L2C
GLONASS: L1 and L2 C/A
Galileo: E12
Update rateUp to 20 Hz raw measurement & position outputs
AccuracySingle Baseline RTK (<5 km):
• 0.008 m + 1 ppm Horizontal
• 0.015 m + 1 ppm Vertical
• <30 ms latency

• 0.25 m + 1 ppm Horizontal
• 0.50 m + 1 ppm Vertical
• <20 ms latency

• 0.50 m Horizontal
• 0.85 m Vertical
• <20 ms latency

Velocity Accuracy:
• Horizontal 0.007 m/sec
• Vertical 0.020 m/sec

RTK initialization: typically <10 seconds
RTK initialization reliability: >99.9%
Time to First FixCold Start <45 seconds
Warm Start <30 seconds
Signal Re-acquisition <2 seconds
Operational LimitsVelocity 515 m/sec
Altitude 18,000 m
ConnectorsI/O: 44 -pin header
GNSS Antenna: MMCX receptacle
Wi-Fi/Bluetooth antenna: MMCX receptacle
UMTS antenna: MMCX receptacle
InterfacesIntegrated 802.11 a/g/b Wi-Fi wireless technology. Client or access point
Integrated 2.4 GHz Bluetooth V3.0 wireless technology
Optional Integrated 3.5G UMTS data module supporting WCDMA and HSDPA
1 USB 2.0 Device port
1 LAN Ethernet port:
• Supports links to 10BaseT/100BaseT auto-negotiate networks
• All functions are performed through a single IP address simultaneously including web GUI access and raw data streaming
• Network Protocols supported: HTTP (web GUI), NTP Server, NMEA, GSOF, CMR over TCP/IP or UDPm, NTripCaster, NTripServer, NTripClient, mDNS/uPnP Service Discovery, Dynamic DNS, eMail alerts, Network link to Google Earth, Support for external modems via PPP, 4
3 x RS232 ports – Baud rates up to 115,200
PPS1 Pulse Per Second Output
ProtocolsReference outputs/inputs: CMR, CMR+, sCMRx, RTCM 2.1, 2.2, 2.3, 3.0, 3.1

Navigation outputs:
• Binary: Trimble GSOF
OtherAdvanced Trimble Maxwell Custom GNSS Technology
High precision multiple correlator for GNSS pseudorange measurements
Unfiltered, unsmoothed pseudorange measurements data for low noise, low multipath error, low time domain correlation and high dynamic response
Very low noise GNSS carrier phase measurements with <1 mm precision in a 1 Hz bandwidth
Signal-to-Noise ratios reported in dB-Hz
Proven Trimble low elevation tracking technology


ElectricalBD920-W3G: 5 V to 28 V DC, typical 1.3 W (L1/L2 GPS + L1/L2 GLONASS)
Antenna LNA Power Input: Input voltage: 3.3 V DC to 5 V DC, maximum current: 400 mA
Mechanical60 mm x 55 mm x 19 mm
TemperatureTemperature range (operation): -40 to +85°C
Temperature range (storage): -55 to +85°C
Humidity5% to 95% R.H. non-condensing, at +60°C
Weight54 grams
VibrationRandom 6.2 gRMS operating
Random 8 gRMS survival
±40 g operating
±75 g survival
Warranty1 Year

Ordering Details

BoardOn request
AccessoriesOn request