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Only for USG
Hardware Specification
Product No : MR-350 S4
User Manual Version 1.2
GlobalSat WorldCom Corporation
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei
Hsien 235, Taiwan
Tel: 886-2-8226-3799 Fax: 886-2-8226-3899
E-mail : service@globalsat.com.tw
Website: www.globalsat.com.tw
Issue Date
MR-350 S4
High Performance GPS Receiver
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Product Description
Product Description
The MR-350 S4 includes an embedded receiver and an antenna. This receiver up to 48
tracking verification channels while providing fast time-to-first-fix, precise position updates, low
power consumption, and adds the capability of Wide Area Augmentation System (WASS). The
MR-350 S4 design uses the latest technology and high-level circuit integration to achieve superior
performance while minimizing space and power requirements. All critical components of the
system include the RF/IF receiver hardware and the digital baseband are designed and
manufactured by GlobalSat to ensure the quality and capability of the GPS.
The MR-350 S4 can be utilized in a variety of applications that require a permanent mounting
configuration. With bulkhead (through-hole) mounting and a low-profile housing, the MR-350 is
completely self-contained and waterproof. Typical application can include marine environments,
aviation, commercial use such as fire truck, police cars and utility vehicles and buses. The
extended 4.5 meters cable allows for easy routing to your equipment behind, headliners and side
panels and terminates to a custom PS/2 connector.
Product Features
SiRF Star IV high performance GPS Chipset
Very high sensitivity (Tracking Sensitivity: chipset -163dBm )
Extremely fast TTFF (Time To First Fix) at low signal level
Support NMEA 0183 V3.0 (GGA, GSA, GSV, RMC)
Build in Super Cap to reserve system data for rapid satellite acquisition
Build in patch antenna
Support RS-232(baud rate 4800) interface
Support Wide Area Augmentation System(WASS)
Waterproof IPX7
Product Specification
Chipset Sirf StarIV
Frequency L1, 1575.42MHz
CA Code 1.023 MHz
Channels 48 track verification channels
Sensitivity -163 dBm
H-Position Autonomous <2.5m
Speed <0.01m/s
Heading <0.01°
MR-350 S4
High Performance GPS Receiver
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Default WGS-84
Acquisition Time
Reacquisition 0.1 sec., average
Hot start 1 sec., average
Warm start 35 sec., average
Cold start 35 sec., average
Dynamic Conditions
Altitude 18,000 meters (60,000 feet) max
Velocity 515 meters / second (1000 knots) max
Acceleration Less than 4g
Electrical Characteristics
Main power input 4.5V ~ 6.5V DC input
Power consumption 80mA
Operating temperature -40 to +85
Baud rate 4800 bps
Output message GGA, GSA, GSV, RMC
Physical Characteristics
Dimension 62mm diameter, 21mm height
Cable length 4.5 meters
Pin Assignment
MR-350 S4
High Performance GPS Receiver
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Pin Description
P/N Define Description
1 Ground Ground
2 VCC This pin is the main DC supply for a 4.5V ~6.5 DC input power.
3 1PPS This pin output signal based on firmware setting.
4 RX This pin is the main receive channel for receiving software commands to the
GPS receiver from SiRFdemo software or from user written software.
5 TX This is the main transmit channel for outputting navigation and measurement
data to user’s navigation software or user written software.
6 NC Just NC.
MR-350 S4
High Performance GPS Receiver
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Reversion history
Reversion Date Name Status / Comments
V1.0 2013/3/27 Mason initial version
V1.1 2013/11/25
Mason Modify Pin assignment picture
V1.2 2013/11/27
Mason Modify 1PPS description