... signal tracked: -159dBm10.Serial Port: 1).Two full duplex serial communication, TTL interface, with user selectable baud rate (4800,9600, ... reference At the pulse positive edge 4).Measurements Aligned to GPS second, ±1 microsecond 12. Environmental Characteristics: 1). Operating ... We specialized in R&D and Production ofthe GPS Antennas , GPS Modules and GPS Receivers for ten years. We have strong R ...