Ct-G434 全球定位模組 GPS 全球定位引擎板 SIRF Star IV OEM 引擎板 GPS 接收器供應商

Features:
- SiRF StarIV internal ROM-based ultra low power chipset
- Compact module size for easy integration : 14.7 x 13.1 x 5 mm
- Ct-G434 smart antenna module provide an I2C compliant interface to connect an optional external serial
- Operating at 1.8V signal level

The Connectec Ct-G434 is a high sensitivity, low power and very compact smart antenna module, with built in GPS receiver. This 48-channel global positioning system (GPS) receiver is designed for a wide range of OEM applications then based on the fast and deep GPS signal search capabilities of SiRFstarIV GSD4e ROM chipset, SiRF’s newest chipset technology. The Ct-G434 provides flexible I/O interfaces (UART , I2C and SPI which can be defined by customer).
Ct-G434 is designed to allow quick and easy integration into GPS-related applications such as:
- PDA, MID, and other portable devices
- Car and Marine Navigation
- Fleet Management / Asset Tracking
- AVL and Location-Based Services
- Hand-Held Device for Personal Positioning and Navigation

SiRF IV GPS Module Features
Performance
- High Performance Solution:
- High sensitivity navigation engine (PVT) tracks as low as -160dBm
- 48 track verification channels
- SBAS (WAAS or EGNOS)
- Active Jammer Remover:
- Removes in-band jammers up to 80 dB-Hz
- Tracks up to 8 CW jammers
- Multimode A-GPS (Autonomous, MS-Based, and MS-Assisted) – With operator support
- *2 Embedded CGEE / SGEE (With back-end server support) speed up TTFF a lot and makes cold start time to be around 20+ seconds
- SiRFGeoRecovTM Reverse EE makes positioning process being done under power saving mode.
- RF Metal Shield for best performance in noisy environments
( *2, Above features should be combined with external EEPROM, please refer to application note. )

Interface
- Multiple host interfaces (UART, I2C, and SPI)
- Secondary I2C port for MEMS connection
- Protocol: NMEA-0183 (default)

Advantages
- Built-in LNA.
- Built-in internal ROM and based on Firmware 4.x.x
- *3 Embed CGEE (Client Generated Extended Ephemeris) that can capture ephemeris data from satellites locally and predicts ephemeris out to 3 days. So if the module was off within 3 days, it could complete positioning process with limited time just like hot start.
- It can remove in-band jammer up to 80db-Hz and track up to 8CW jammers, so the module can prevent GPS signal interference when design-in the electrical device with noisy electrical signal interferences such as Laptop, mobile , DSC, etc.
- Tracking sensitivity as low as -163dBm, even without network assistance.
- Support SiRF Aware technology
- Support adaptive “Micro Power Controller” power management mode
- *4 Support MEMS sensor through I2C interface. (V4.X.X firmware is available for now)
- MEMS interrupt can improve Micro Power Mode performance.
- Only 8mW Trickle Power, so user can leave power on all day instead of power off
- Suitable for battery drive devices that need lower power consumption application
- Cost saving through elimination of RF and board to board digital connectors
- Flexible and cost effective hardware design for different application needs
( *3/*4, Above features should be combined with external EEPROM, please refer to application note. )

Technical specifications
Feature Item Description
Chipset GSD4e/ROM base SiRF StarIV-ROM core logic
General Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 48
Sensitivity -160dB *
Accuracy Position <2.5 meters
Velocity 0.1 meters/second
Time 1 microsecond synchronized to GPS time
Datum Default WGS-84
Other selectable for other Datum
Time to First Fix
(TTFF @-130dBm) Reacquisition 0.1 sec., average
Snap start 1 sec., average
Hot start 1~2 sec.
Warm start 9~15 sec. *
Cold start 25~35 sec. *
Dynamic
Conditions Altitude 18,000 meters (60,000 feet) max.
Velocity 515 meters/second (1000 knots) max.
Acceleration 4g, max.
Jerk 20 meters/second3, max.
Power Main power input 1.71 ~ 1.89 VDC input
Power consumption Average: 46mA (Tracking Mode)
Backup Power 1.71 ~ 1.89 VDC input
Serial Port Electrical interface UART/I2C/SPI
Protocol messages NMEA-0183
Antenna Patch Antenna 12*12*2mm
Gain -1.22 dBic Max* (@ Zenith)
Polarization Right Hand Circular Polarization
Bandwidth 10 MHz Min* (@ –10dB)
Axis Ratio ≦ 5.5dB*
* Based on ground size 60* 60 mm2 size
* With external EEPROM

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