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Version 1301
33.0 x 35.0 x 6.0 mm
CHM-3335
COMBO GNSS, GSM/GPRS MODULE
Introduction
LOCOSYS CHM-3335 combined certified GNSS and GSM/GPRS solution in a small-form-factor combo
module; it is capable of providing precise autonomous position, velocity, and delivering GSM/GPRS
performance for voice, SMS and data. The module can simultaneously acquire and track multiple
satellite constellations that include GPS, BEIDOU, QZSS and SBAS.
General Specifications
• GPS, BeiDou, SBAS, QZSS L1 frequency for
GNSS; standard NMEA-0183 messages output
• Quad band GSM/GPRS 850/900/1800/1900MHz;
control via AT commands
• Dimensions: 33.0 x 35.0 x 6.0 mm ± 0.2 mm
• Weight: 7.8 g
• Supply voltage range: 3.5 ~ 4.5 VDC
• Operation temperature: -20 °C to +70 °C
• Storage temperature: -40 °C to +85 °C
• 50 pins Hirose DF12 board to board connector
• ISO/TS 16949 quality control
GSM/GPRS Specifications
• Quad-band GSM/GPRS: 850 MHz/900 MHz/1800
MHz/1900 MHz
• Maximum transmitter power
▪ GSM850 Class 4 (2 W)
▪ EGSM900 Class 4 (2 W)
▪ GSM1800 Class 1 (1 W)
▪ GSM1900 Class 1 (1 W)
• Compliant to GSM/GPRS Phase 2/2+
• GPRS Class 10: Max. 42.8kbps (uplink); Max.
85.6kbps (downlink)
• Coding schemes CS 1, CS 2, CS 3, CS 4
• PBCCH support
• Integrated TCP/IP stack
• CSD up to 9.6kbps
• Point-to-point MO and MT
• SMS cell broadcast
• Text and PDU mode
• Refer to HUAWEI MG323-B GSM LCC AT
command list
GNSS Specifications
• GPS, BeiDou, SBAS, QZSS L1 frequency for GNSS;
standard NMEA-0183 messages output
• Capable of SBAS (WAAS, EGNOS, MSAS, GAGAN)
• Support 99-channel GNSS
• Fast TTFF at low signal level
• Built-in 12 multi-tone active interference canceller
• Free hybrid ephemeris prediction to achieve faster
cold start
• Built-in data logger
• Up to 10 Hz update rate
• ±11ns high accuracy time pulse (1PPS)
• Indoor and outdoor multi-path detection and
compensation
• Sensitivity: tracking -165dBm; cold start: -148dBm
• Acquisition time: cold start: 33s; hot start: 1s;
AGPS: 15s
• Accuracy: 2.5m CEP
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