Products > GPS > ZX4125
High sensitivity ultra low power consumption cost efficient

ZX-4125 Specification  
Brief Introduction

Wonde-X series GPS module ZX4125/ZX4125P (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 other Wondeproud 16 channel GPS receivers and 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 ZX4125/ZX4125P 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 Features

* Built-in high performance NEMERIX chipset.
* Average Cold Start in 60 seconds.
* ltra Low power consumption.( ZX4125 27mA typ @ 3.3V )
* 16 channels ?All-in-View?tracking.
* On chip 4Mb flash memory.
* TTL level serial port for GPS receiver command message Interface.
* Compact Board Size ZX4125 1.043' x 1.043' x 0.11' (26.5 x 26.5 x 3.0 mm)
ZX4125P 1.043' x 1.043' x 0.27' (26.5 x 26.5 x 7.0 mm)
For easy integration into hand-held device.
* Support Standard NMEA-0183 V3.0
* Option Accurate 1PPS Output Signal Aligned with GPS Timing
* Multi-path Mitigation Hardware
* Optimum clock drift adjustment
* External antenna open/short detector
* Support dual antenna with built-in auto-detect RF switch (ZX4125P)
Technical Specifications


Electrical Characteristics 


Frequency                         L1, 1575.42 MHz 

C/A code                           1.023 MHz chip rate 

Channels                           16 



Tracking                            -152dBm typ 

Acquisition                        -139dBm typ 



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

Velocity                             0.1 meters/second 

Time                                  1 microsecond synchronized to GPS time 



Default                             WGS-84 

Other                                Support different datum by request 


Acquisition Rate (Open sky, stationary requirements) 

Hot start                          12 sec, average 

Warm start                      38 sec, average 

Cold start                        60 sec, average 


Dynamic Conditions 

Altitude                            10,000 meters max 

Horizontal Velocity         300 kilometers/hour max 

Vertical Velocity             36 kilometers/hour max 

Acceleration                    2g, max 

Jerk                                 4 meters/second3, max  



Main power input            3.3 ±5% VDC input. 

Supply Current                ZX4125  27 mA @ 3.3V(Continuous mode) 

                                         ZX4125P 33 mA @ 3.3V (Continuous mode) 

                                         including LNA 


Serial Port 

Electrical interface         one full duplex serial communication, TTL   


Protocol message            NMEA-0183, version 3.0 optional. 

Default NMEA               GGA, GSA, GSV, RMC and VTC. 9600 baud  

                                 rate, 8 bits data, 1 start, 1 stop, no parity.  

                                         (GSA, & GSV is 3 sec output 1 msg, option baud  

                                         rate: 4800, 19200, 38400) 


Time-1PPS Pulse (optional) 

Level                               TTL 

Pulse duration                 100ms 

Time reference               at the pulse positive edge 

Measurements                Aligned to GPS second, +-1 microsecond 


Recommended External Antenna Specification 

Gain                                20dB (including cable loss) 

Noise figure                    1.5dB 

Current                           3 ~ 30mA 

Operate Voltage            2.5 ~ 2.8V 


Environmental Characterisitics 

Operating temperature range               -40 deg. C to +80 deg. C 

Storage temperature range                   -55 deg. C to +100 deg .C 


 Physical Characteristics 

                Dimension : ZX4125      1.043' x 1.043' x 0.11' (26.5 x 26.5 x 3.0 mm)  

                                 ZX4125P    1.043' x 1.043' x 0.27' (26.5 x 26.5 x 7.0 mm) 

 Weight :      ZX4125           3.4g 


 Antenna connector: 1.27 mm pitch 3 pin board to board 

 Interface connector: 1.27 mm pitch 10 pin / 6 pin board to board 


Remarks: Difference between ZX4125 & ZX4125P. 

                ZX4125:   one rf input with antenna detector. 

                                 (Use Active antenna only) 

                ZX4125P: two rf input with auto switch. 

                                 (One patch antenna, one external antenna) 


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