2. ptf 3203A GlobalTyme - Technical Overview
The GlobalTyme automatically acquires and tracks satellites based on health
status and elevation angle. To undertake an accurate, three dimensional
(latitude, longitude, altitude) position fix, and the unit requires transmissions
from at least four satellites. Once accurate position data has been
automatically acquired, or manually entered, provision of accurate time and
frequency outputs requires only one satellite.
Figure 1. ptf 3203A GlobalTyme Schematic
2.1. Technical Description
The ptf 3203A GlobalTyme multifunction GPS receiver architecture is
based upon a 35MHz microprocessor interfacing to a standard 12
channel GPS receiver and an FPGA to provide the range of functionality.
The GPS receiver input comes from a bullet antenna with 35 dB gain
(supplied) connected by means of a 30ft coax cable and TNC input
connector to the unit chassis.
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