The Pentar SA101 Receiver Module is a GPS receiver adapter that converts Furuno GT-8031 modules into Motorola M12T+-compatible form factor and binary messaging protocol. Designed for industrial and laboratory GPS timing applications, the SA101 integrates an onboard microcontroller (PC001 firmware) to perform real-time protocol conversion between Furuno GT-8031 and Motorola M12T+ standards, enabling drop-in compatibility with existing GPS timing receiver platforms.
Technical Specifications
• Core Module: Furuno GT-8031 GPS receiver
• Protocol Conversion: Onboard microcontroller with PC001 firmware
• Operating Voltage: 3.0 to 3.6 VDC
• PCB Thickness: 1/16 inch
• Antenna Connector: Right-angle MMCX
• Data Connector: Mating socket Samtec CLP-105-02-L-D-XX series (5×2 pin matrix)
• Physical Dimensions: Approximately 60 mm × 40 mm; assembly stands ~7 mm thicker than Motorola M12T+ due to mounted GT-8031 module
• Time Output: 1PPS (pulse per second) and GPS time signals
– Key Features
• Form factor mechanically compatible with Motorola M12T+ for retrofit applications
• Binary messaging protocol conversion handled transparently by embedded microcontroller
• Pin 8 on data connector (RTCM IN equivalent) is unconnected
• Delivers accurate 1PPS and time signals; note that date reporting lags by 1024 weeks due to week number rollover in the GT-8031 module—this does not affect time or 1PPS accuracy
– Typical Applications
• Industrial GPS timing receivers
• Laboratory timing standards
• Symmetricom Syncserver platforms
• Arbiter timing systems
• Legacy Motorola M12+ clone GPS receiver card replacements
– Compatibility & Integration
The SA101 serves as a direct mechanical and electrical substitute for Motorola M12T+ modules in systems designed around that form factor. Protocol conversion is handled automatically, requiring no host-side firmware modifications. Operating voltage range of 3.0 to 3.6 VDC aligns with standard low-voltage GPS receiver supplies.
