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Part 1 
− Universal Socket Connectivity 
Chapter 1 – Universal Socket Connectivity 
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342M) 
37 
 
Global Positioning System (GPS)  
This information applies only to the SocketModem Cell & iCell GPRS with GPS (MTSMC-G2-GP) and the 
SocketModem® Cell and SocketModem iCell CDMA 1xRTT with GPS (MTSMC-C1-GP) 
 
Technical Specifications 
Receiver Type 
L1 Frequency 
 
GPS C/A code 
 SBAS 
Capable 
 
51 Channel Acquisitions 
 
14 Channel Tracking 
Accuracy
 
 
Position 2.5m CEP 
 Velocity 
0.1m/sec 
 Timing 
300ns 
Open Sky TTFF
  
Hot start 1 second 
 
Cold start 29 seconds average 
 Reacquisition 
1s 
Sensitivity Tracking 
161dBm 
Update Rate
  
1Hz  standard 
Dynamics
  
4G 
Operational Limits 
 Altitude < 18,000m
 
or Velocity < 515m/s
 
Datum 
  
Default 
WGS-84
 
Interface 
  
UART 
 
Protocol 
 
 
NMEA-0183 V3.01, GGA, GLL, GSA, GSV, RMC, VTG 
 
 
Features 
• 
Tests 8 million time-frequency hypothesis per sec 
• 
Open sky cold start – 29 second 
• 
Signal detection better than -161dBm 
• 
Reacquisition sensitivity – 155dBm 
• 
Accuracy 2.5m CEP 
• 
Multipath detection and suppression 
• 
Supports active or passive antenna 
 
 
Underwriters Laboratories Required Global Positioning System (GPS) 
Statement  
Note the following information required by Underwriters Laboratories: 
Underwriters Laboratories, Inc. (“UL”) has not tested the performance or reliability of the Global Positioning 
System (“GPS”) hardware, operating software or other aspects of this product. UL has only tested for fire, 
shock or casualties as outlined in UL’s Standard(s) for Safety.UL60950-1 Certification does not cover the 
performance or reliability of the GPS hardware and GPS operating software. UL MAKES NO 
REPRESENTATIONS, WARRANTIES OR CERTIFICATIONS WHATSOEVER REGARDING THE 
PERFORMANCE OR RELIABILITY OF ANY GPS RELATED FUNCTIONS OF THIS PRODUCT. 
 
 
 
 
 
Preliminary  
Confidential