Holux GPS module GR-87

Holux GPS module GR-87

Overview

·HOLUX GR-87 is a high performance, low power consumption, small size, very easy integrated GPS module designed for a broad spectrum of OEM system applications. This product is based on the proven technology found in other HOLUX 20 channel GPS receivers and SiRFstar III chipset solution. The GPS module will track up to 12 satellites at a time while providing fast time-to-first-fix and one-second navigation updates. Its far reaching capability meets the sensitivity requirements of car navigation as well as other location-based applications. Therefore, HOLUX GR-87 module is very fit to the customers who devote themselves to AVL system integration and location-based service.

·The GR-87 design utilizes the latest surface mount technology (BGA) and high level circuit integration to achieve superior performance while minimizing space and power requirements. 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 application system may communicate with the module set via two RS232 compatible bi-directional communication channels with CMOS/CMOS 3V voltage level.

Features
·Build on high performance SiRF StarIII chipset.
·Average Cold Start time and under 45 seconds.
·Low power consumption
·20 channels “All-in-View” tracking.
·200, 000+ effective correlators for fast TTFF and high sensitivity acquisitions
·Integrated ARM7TDMI CPU with software engineering services and available for embedded customer defined applications.
·On chip 1Mb SRAM.
·Dual TTL level serial ports with one for GPS receiver command message interface, another one for RTCM-104 DGPS input.
·Compact Board Size 1"x1"x0.27"(25.4x25.4x7mm) for easy integration into hand-held device.
·Reacquisition Time 0.1 seconds
·Support Standard NMEA-0183 and SiRF Binary protocol
·Support Accurate 1PPS Output Signal Aligned with GPS Timing
·Multi-path Mitigation Hardware
·On-board RTCM SC-104 DGPS and WAAS /EGNOS Demodulator
·Built-in a lithium battery make GPS fast positioning

General
·Frequency: L1, 1575.42MHZ
·C/A Code: 1.023MHZ chip rate
·Channels: 20

TIMEMARK-1PPS Pulse
·Level CMOS 3V Pulse duration 1 microsecond.
·Time reference At the pulse positive edge.
·Measurements Aligned to GPS second, 1 microsecond.

Datum
·Default WGS-84 .
·Other Support different datum by request .

Physical Characteristics
·Active Size: 25.4(W) x 25.4(D) x 7(H) (mm)
·Weight: 2 g
·Interface connector 6-pin straight male header, 1.25 mm pitch .

Environmental Characteristics
·Operating temperature range : -10 ℃ to +60 ℃
·Storage temperature range: -20 ℃ to +85 ℃

Power :
·Input power 3.3V - 5.5VDC
·Input current: Less than 80 mA (without antenna)
·Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours discharge.

Accuracy (Open Sky)
·Position ㄩ 10 meters, 2D RMS .
·7 meters 2D RMS, WAAS corrected .
·1-5 meters, DGPS corrected .
·Altitude < 35m Vertical in term of 95% .
·Velocity 0.1 meters/second .
·Time 1 microsecond synchronized to GPS time

Acquisition Rate (Open sky, stationary requirements)
·Reacquisition: 0.1 sec., average.
·Hot start: 1 sec., average.
·Warm start: 38 sec., average.
·Cold start: 42 sec., average.

Interface
·Antenna connector type: MMCX, output 2.8 VDC. (optional output VCC_IN).
·Minimum signal tracking: -159 dBm.
·Two full duplex serial communication, CMOS interface, with user selectable baud rate (4800-Default, 9600, 19200, 38400).
·NMEA 0183 Version 2.2 ASCII output (GGA, GSA, GSV, RMC (VTG , GLL and ZDA for optional)) .
·SiRF binary-position, velocity, altitude, status output .