2
Low Voltage - GPS25-LVx designation indicates that the unit is designed to
operate from a low voltage 3.6VDC to 6.0VDC supply. Operation at about 4VDC
is the most power efficient mode of operation for the GPS25LP sensor. The unit is
protected if a high voltage is inadvertently applied to the input.
RS-232 Serial Data - GPS25-xVS designation means that the two bi-directional
serial data ports are true RS-232 ports conforming to the RS-232E standard.
CMOS Serial Data - GPS25-xVC designation means that the two bi-directional
serial data ports use CMOS output buffers. The inputs buffers will accept either
CMOS(TTL) voltage levels or RS-232 voltage levels. This configuration is
adequate for communicating directly with serial devices over short cable lengths
(less than 20 meters).
1.3 Features
The GPS 25LP sensor boards provide a host of features that make it easy to integrate
and use.
1) Full navigation accuracy provided by Standard Positioning Service (SPS)
2) Compact design ideal for applications with minimal space
3) High performance receiver tracks up to 12 satellites while providing fast first fix
and low power consumption
4) Differential capability utilizes real-time RTCM corrections producing less than 5
meter position accuracy
5) On-board clock and memory are sustained by a rechargeable memory backup
battery which recharges during normal operation or by optional external standby
power
6) User initialization is not required.
7) Two communication channels and user selectable baud rates allow maximum
interface capability and flexibility. The standard channels are CMOS/TTL levels
for the -xVC version or RS-232 for the xVS versions.
8) Highly accurate one-pulse-per-second output for precise timing measurements.
The default pulse width is 100 msec, however it is configurable in 20 msec
increments from 20 msec to 980 msec.
9) Binary Format Phase Data Output on TXD2
