Trimble BD920

Dual frequency receiver speeds development
of mobile positionning applications

Trimble BD920

The Trimble BD920 is a small, dual frequency OEM GNSS receiver board that is capable of receiving a wide range of commercially available GNSS signals. It features centimeter-level, Real-Time Kinematic (RTK) positioning capabilities that are ideal for high-precision and control applications.

Test Driver

Key Features:

220 Channels for multi-constellation GNSS support
Compact design for mobile applications
Fully EMI shielded module
Flexible RS232, USB and ethernet interfacing
Centimeter level position accuracy
Supports FDE and RAIM

Compact full metal jacket design

The Trimble® BD920 GNSS receiver module has been designed for applications requiring centimeter accuracy in a very small package. Mobile platforms can now embed proven Trimble RTK technology using a shielded module with a 51 mm x 41 mm x 7 mm form factor. The Trimble BD920 is a complete drop-in, solder-down module manufactured and tested to Trimble’s highest quality standards. This design ensures the high quality GNSS signals are protected from the sources of EMI on the host platform. It also signifi cantly reduces radiated emissions which speeds compliance certifi cation and time to market.

Multi constellation GNSS

The Trimble BD920 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 contains an advanced kalman fi lter PVT engine that delivers high accuracy GNSS, DGNSS positions in the most challenging environments such as urban canyons. Diff erent confi gurations of the module are available including single frequency RTK and GPS only. All features are passwordupgradeable, 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 safety-critical 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 provides assurance of long-term future-proofi ng and trouble-free operation. Moving the industry forward, the Trimble BD920 redefi nes high-performance positioning:

On-board multipath mitigation
Proven low-elevation tracking technology

Flexible Interfacing

The Trimble BD920 was designed for easy integration and rugged dependability. Customers benefi t from the Ethernet connectivity available on the board, allowing high speed data transfer and confi guration 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.

TECHNICAL SPECIFICATIONS¹

220 Channels:
- GPS: L1 C/A, L2E, L2C
- GLONASS: L1 and L2 C/A
- Galileo: E1²
- QZSS: L1 C/A, L1 SAIF, L2C
- SBAS: L1 C/A
Advanced Trimble Maxwell 6 Custom Survey 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
Proven Trimble low elevation tracking technology
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 UDP
  - NTripCaster, NTripServer, NTripClient
  - mDNS/uPnP Service discovery
  - Dynamic DNS
  - eMail alerts
  - Network link to Google Earth
  - Support for external modems via PPP
4 x RS232 ports
- Baud rates up to 115,200
Up to 20 Hz raw measurement & position outputs
Reference outputs/inputs
- CMR, CMR+, sCMRx, RTCM 2.1, 2.2, 2.3, 3.0, 3.1¹²
Navigation outputs
- VGK, VHD, ROT, GGK, GGA, GSA, ZDA, VTG, GST, PJT, PJK, BPQ, GLL, GRS, GBS and Binary: Trimble GSOF
Control Software: HTML web browser, Internet Explorer, Firefox, Safari, Opera, Google Chrome
1 Pulse Per Second Output
Event Marker Input Support
Supports Fault Detection & Exclusion (FDE), Receiver Autonomous Integrity Monitoring (RAIM)

ORDERING INFORMATION

Module Part Number : 60920-XX
Module : Trimble BD920 GNSS available in a variety of
configurations from SBAS upwards
Evaluation Kit : Includes interface board and power supply

PERFORMANCE SPECIFICATIONS

Time to First Fix (TTFF)⁷
- Cold Start⁸ : <45 seconds
- Warm Start⁹ : <30 seconds
- Signal Re-acquisition : <2 seconds
Velocity Accuracy^{3 , 4}
- Horizontal : 0.007 m/sec
- Vertical : 0.020 m/sec
Acceleration : 11g
Maximum Operating Limits¹⁰
- Velocity : 515 m/sec
- Altitude 18,000 m

POSITIONING SPECIFICATIONS³

RTK initialization time³ : typically <1 minute
RTK initialization reliability³ : >99.9%

PHYSICAL AND ELECTRICAL CHARACTERISTICS

Size : 51 mm x 41 mm x 7 mm
Power : 3.3 V DC +5%/–3%
Typical 1.3 W (L1/L2 GPS + L1/L2 GLONASS)
Weight : 24 grams
Connectors
- I/O : 80 pin Narrow Pitch Panasonic Socket
- Antenna : MMCX receptacle
Antenna LNA Power Input
- Input voltage : 3.3 V DC to 5 V DC
- Maximum current : 400 mA
Minimum required LNA Gain : 28.5 dB

ENVIRONMENTAL CHARACTERISTICS¹¹

Temperature
- Operating : –40 °C to +85 °C
- Storage : –55 °C to +85 °C
Vibration : MIL810F, tailored
Random 6.2 gRMS operating
Random 8 gRMS survival
Mechanical shock : MIL810D
±40 g operating
±75 g survival
Operating Humidity : 5% to 95% R.H. non-condensing, at +60 °C

¹Trimble BD920 is available in a variety of software configurations. Specifications shown reflect full capibility
²Developed under a License of the European Union and the European Space Agency
³May be affected by atmospheric conditions, signal multipath, and satellite geometry. Initialization reliability is continuously monitored to ensure highest quality
⁴1 sigma level, when using Trimble Zephyr 2 antennas.
⁵At maximum output rate
⁶GPS only and depends on SBAS System performance. FAA WAAS accuracy specifications are <5 m 3DRMS
⁷Typical observed values.
⁸No previous satellite (ephemerides / almanac) or position (approximate position or time) information
⁹Ephemerides and last used position known
¹⁰As required by the U.S. Department of Commerce to comply with export licensing restrictions
¹¹Dependent on appropriate mounting/enclosure design.
¹²Input only network correction