This file is a product manual of GlobalSat Technology Corporation, introducing the features of its GPS engine board ET-332, including high-performance GPS chip, very high sensitivity, extremely fast TTFF, compact size, support for NMEA 0183 and SiRF binary protocol
This manual describes the GlobalSat ET-332 GPS Engine Board, featuring a SiRF star high‑performance GPS chipset, compact dimensions (40.5 mm × 35 mm × 10 mm), and support for NMEA 0183 and SiRF binary protocols. It includes power requirements, environmental limits, and detailed pin‑out information for the 12‑pin connector.
The document also provides software command reference tables for NMEA messages, configuration commands, and development/debug options, as well as guidance on backup battery usage and datum selection for coordinate transformations.
| Chipset | SiRF Star |
|---|---|
| Frequency | L1 1575.42 MHz |
| Channels | 20 |
| Sensitivity | -159 dBm |
| Power input voltage | 3.8 V ~ 6.5 V DC |
| Power consumption (continuous) | 75 mA |
| Power consumption (trickle) | 30 mA |
| Baud rate | 4,800 – 57,600 bps |
| Operating temperature | -40 °C to +85 °C |
| Dimensions | 40.5 mm × 35 mm × 10 mm |
| Position accuracy | 10 m (2D RMS 5 m) |
| Velocity accuracy | 0.1 m/s |
| Maximum altitude | 18,000 m (60,000 ft) |
| Maximum speed | 515 m/s (1000 knots) |
The board operates from a main DC supply of 3.8 V to 6.5 V.
It can track up to 20 channels in view at the same time.
Cold start is achieved in under 40 seconds.
A backup battery voltage between 2.5 V and 3.6 V is recommended.