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About Trimble's Lassen IQ GPS Reciever

About Trimble's Lassen IQ GPS Reciever

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    The Lassen iQ GPS receiver is a full featured, ultra low power receiver on a miniature form factor, suitable for a variety of mobile, embedded applications. The Lassen iQ GPS receiver incorporates Trimble’s FirstGPSTM architecture in the form of two ASICS: Colossus RF down converter and IO-C33 baseband chip.

    The IO-C33 integrates Trimble’s IO digital signal processor with the Epson C33 RISC processor, real-time clock, UART, and 1Mbit memory. Together with the colossus RF, this implementation of FirstGPS technology makes possible one of the smallest (26 mm x 26 mm x 6mm) and lowest power (less than 89 mW) GPS modules available.

    The Lassen iQ GPS receiver outputs a complete position, velocity, and time (PVT) solution in the NMEA Version 3.0 ASCII protocol, the Trimble ASCII Interface Protocol (TAIP), and the Trimble TSIP binary protocol. A Pulse-Per-Second signal is available for very accurate timing applications.

    Receiver Performance
    The Lassen iQ GPS receiver is a complete 12-channel parallel tracking GPS receiver designed to operate with the L1 frequency, Standard Position Service, Coarse Acquisition code. Using two highly integrated Trimble custom integrated circuits, the receiver is designed in a modular format especially suited for embedded applications where small size and extremely low power consumption are required. The receiver features Trimble's latest signal processing code, a highgain RF section for compatibility with standard 27 dB active gain GPS antennas, and a CMOS TTL level pulse-per-second (PPS) output for timing applications or for use as a general purpose synchronization signal.

    The Lassen iQ GPS receiver acquires a position fix with minimal delay after power cycling. The battery back-up RAM is used to keep the Real Time clock (RTC) alive, and to store the following:
    • Almanac
    • Ephemeris
    • Last position
    User settings such as port parameters, NMEA, and TAIP configurations can be stored in the receiver’s non-volatile (Flash) memory. These settings are retained without application of main power or battery back-up power.

    The Lassen iQ GPS receiver has two configurable serial I/O communication ports