| SGM-108 |
USB/PS2/RS-232/SN4 |
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| The SGM-108 series GPS receiver incorporates low noise, high sensitivity, low power consumption NemeriX chipset solution in a compact, waterproof enclosure. The receiver is very suitable for broad applications such as car navigation, mapping, surveying, ?etc. Only clear view of sky and certain power supply are necessary to the unit. It communicates with other host device via one full duplex serial communication RS-232 port or one universal USB port or PS2 port. With its ultra low power consumption, the receiver tracks up to 16 satellites at a time while offering fast time-to-first-fix, re-acquires satellite signals in 1 second (average) and updates position data every second. |
Features
The SGM-108 series provides a host of features that make it easy for integration and use.
1. Ultra low power design.
2. High performance receiver tracks up to 16 satellites.
3. Compact design ideal for applications with minimal space.
4. A rechargeable battery sustains internal clock and memory.
5. User initialization is not required.
6. One full duplex serial RS-232 port or USB port meets all applications.
7. Waterproof design for all weather.
8. Built-in low noise, high gain active antenna.
9. LED display provides users visible positioning status.
10. Support Standard NMEA-0183 at baud rate 4800
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| Electrical Characteristics |
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| General |
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| Frequency |
L1, 1575.42 MHz |
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| C/A code |
1.023 MHz chip rate |
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| Channels |
16 channels all in view tracking |
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| Antenna |
internal |
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| Sensitivity |
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| Tracking |
-152 dBm typical |
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| Acquisition |
-147 dBm typical |
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| Accuracy |
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| Position |
6.4 meters CEP (90 %) horizontal without SA |
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| Velocity |
0.1 meters/second |
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| Time |
1 microsecond synchronized to GPS time |
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| Datum |
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| Default |
WGS-84 |
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| Other |
Support different datum by request |
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| Acquisition Rate |
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| Hot start |
12 sec, average |
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| Warm start |
38 sec, average |
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| Cold start |
50 sec, average |
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| Dynamic Conditions |
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| Altitude |
10,000 meters max |
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| Horizontal Velocity |
300 kilometers/hour max |
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| Vertical Velocity |
36 kilometers/hour max |
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| Acceleration |
2g max |
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| Power |
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| Main power input |
3.3 ±5% VDC input. |
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| Supply Current |
30 mA @ 3.3V |
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| Serial Port |
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| Electrical interface |
one full duplex serial communication, via RS232/ TTL interface, or universal USB interface |
| Protocol message |
NMEA-0183 |
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| Default NMEA |
GGA, GSA, GSV, RMC, 4800 baud rate, (VTG, GLL, and RMS optional) |
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8 bits data, 1 start, 1 stop, no parity. |
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| Time-1PPS Pulse |
(optional) |
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| Environmental Characteristics |
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| Operating temperature range |
-40 oC to +80 oC |
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| Storage temperature range |
-45 oC to +95 oC |
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