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MTI-3 Nemerix

MTI-3 Nemerix
StarsNav series GPS module MTI-3/MTI-3T (patch on top) is a high sensitivity ultra low power consumption cost efficient, compact size; plug & play GPS module board designed for a broad spectrum of OEM system applications. This product is based on the proven technology found in NEMERIX chipset solution. The GPS module receiver will track up to 16 satellites at a time while providing fast time-to-first-fix and 1Hz navigation updates. Its far-reaching capability meets the sensitivity & accuracy requirements of car navigation as well as other location-based applications, such as AVL system. Handheld navigator, PDA, pocket PC, or any battery operated navigation system.

The MTI-3/MTI-3T design utilizes the latest surface mount technology and high level circuit integration to achieve superior performance while minimizing dimension and power consumption. This hardware capability combined with software intelligence makes the board easy to be integrated and used in all kinds of navigation applications or products. The module communicates with application system via RS232 (TTL level) with NMEA0183 protocol.

Main Feature

Build-high performance NEMERIX chipset.
Average Cold Start is in less than 45 seconds.
Low power consumption.
16 channels "All-in-View" tracking.
On chip 4Mb flash memory.
TTL level serial ports with one for GPS receiver command message Interface, and one for RTCM-104 DGPS input
Compact Board Size MTI-3 ( 26.5 x 26.5 x 3.0 mm )
MTI-3T ( 26.5 x 26.5 x 7.0 mm ) for easy integration into hand-held device.
Reacquisition Time : 0.1 seconds
Support Standard NMEA-0183 and NEMERIX Binary protocol
Option Accurate 1PPS Output Signal Aligned with GPS Timing
Multi-path Mitigation Hardware
Optimum clock drift adjustment

Technical Specifications

Electrical Characteristics

Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 16

7 meters CEP (90%) horizontal, SA off.

Velocity 0.1 meters/second

1 microsecond synchronized to GPS time


Default WGS-84
Other Support different datum by request
Acquisition Rate (Open sky, stationary requirements)

0.1 sec, average

Snap start 2 sec, average
Hot start

10 sec, average

Warm start 38 sec, average
Cold start

45 sec, average

Dynamic Conditions  
Altitude 18,000 meters (60,000 feet) max
Velocity 515 meters/second (1,000 knots) max
Acceleration 4g, max
Jerk 20 meters/second, max
Main power input 3.3 ±5% VDC input
Power consumption

511mW (Continuous mode)

Supply Current MTI-3 27 mA @ 3.3V(Continuous mode)
  MTI-3 30 mA @ 3.3V(Continuous mode) including LNA
Serial Port  
Electrical interface

One full duplex serial communication, TTL interface

Protocol message

NEMERIX binary and NMEA-0183, version 3.0 with a baud rate selection and NMEA sentence sequence / update rate.

Default NMEA

GGA, GSA, GSV, RMC and VTC. 9600 baud rate, 1 start bit, 1stop bit, no parity bit.

Time-1PPS Pulse
Level TTL
Pulse duration 100ms
Time reference At the pulse positive edge

Aligned to GPS second, +-1 microsecond

Environmental Characteristics

Operating temperature range -40 deg. C to +80 deg. C
Storage temperature range -55 deg. C to +100 deg .C

Physical Characteristics

Dimension: MTI-3 1.043"x1.043"x0.11 (26.5x26.5x3.0mm)
MTI-3T 1.043"x1.043"x0.27 (26.5x26.5x7.0mm)
Weight: MTI-3  
Antenna connector: 1.27 mm pitch 3 pin board to board
Interface connector 1.27 mm pitch 10 pin / 6 pin board to board

Mechanical Dimensions

1. MTI-3

2. MTI-3T