Holux GR-87 Manuale utente

GPS

Productseries With HOLUX, You never lose the way!

HOLUX Technology, Inc.

1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)

TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:[email protected]om.tw Website:www.holux.com.tw

GR-87 GPS Receiver Module

1. Main Feature

zBuild on high performance SiRF StarIII chipset.

zAverage Cold Start time and under 45 seconds.

zLow power consumption

z20 channels “All-in-View” tracking.

z200,000+ effective correlators for fast TTFF and high sensitivity

acquisitions

zIntegrated ARM7TDMI CPU with software engineering services and

available for embedded customer defined applications.

zOn chip 1Mb SRAM.

zDual TTL level serial ports with one for GPS receiver command message

interface, another one for RTCM-104 DGPS input.

zCompact Board Size 1”x1”x0.27”(25.4x25.4x7mm) for easy integration

into hand-held device.

zReacquisition Time 0.1 seconds

zSupport Standard NMEA-0183 and SiRF Binary protocol

zSupport Accurate 1PPS Output Signal Aligned with GPS Timing

zMulti-path Mitigation Hardware

zOn-board RTCM SC-104 DGPS and WAAS /EGNOS Demodulator

zBuilt-in a lithium battery make GPS fast positioning

2. Technical Specifications

2.1. Electrical Characteristics

2.1.1 General

1). Frequency：L1, 1575.42 MHz.

2). C/A code：1.023 MHz chip rate.

3). Channels：20.

2.1.2 Accuracy (Open Sky)

1). Position：10 meters, 2D RMS.

2). 7 meters 2D RMS, WAAS corrected.

3). 1-5 meters, DGPS corrected.

GPS

Productseries With HOLUX, You never lose the way!

HOLUX Technology, Inc.

1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)

TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw

4). Altitude ：< ± 35m Vertical in term of 95%.

5). Velocity：0.1 meters/second.

6). Time 1 microsecond synchronized to GPS time.

2.1.3 Datum

1). Default：WGS-84.

2). Other Support different datum by request.

2.1.4 Acquisition Rate (Open sky, stationary requirements)

1). Reacquisition：0.1 sec., average.

2). Hot start：1 sec., average.

3). Warm start：38 sec., average.

4). Cold start：42 sec., average.

2.1.5 Dynamic Conditions

1). Altitude : 18,000 meters (60,000 feet) max.

2). Velocity：515 meters/second (1000 knots) max.

3). Acceleration：4g, max.

4). Jerk：20 meters/second, max.

2.1.6 Power

1). Input power input：3.3 ~ 5.5 VDC input.

2). Input current: Less than 80 mA (without antenna) .

3). Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours

discharge.

2.1.7 RF interface

1). Antenna connector type: MMCX, output 2.8 VDC. (optional output

VCC_IN)

2). Minimum signal tracking: -159 dBm.

2.1.8 Serial Port

1). Two full duplex serial communication, CMOS interface, with user

selectable baud rate (4800-Default, 9600, 19200, 38400).

2). NMEA 0183 Version 2.2 ASCII output (GGA, GSA, GSV, RMC (VTG ,

GLL and ZDA for optional)).

3). DGPS protocol RTCM SC-104 message types 1, 2 and 9.

4). SiRF binary-position, velocity, altitude, status output.

GPS

Productseries With HOLUX, You never lose the way!

HOLUX Technology, Inc.

1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)

TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw

2.1.9 TIMEMARK-1PPS Pulse

1). Level CMOS 3V.

2). Pulse duration 1 microsecond.

3). Time reference At the pulse positive edge.

4). Measurements Aligned to GPS second, ±1 microsecond.

2.2. Environmental Characteristics

1). Operating temperature range -10 ℃to +60 ℃.

2). Storage temperature range -20 ℃to +85 ℃.

2.3. Physical Characteristics

1) Active Size: 25.4(W) x 25.4(D) x 7(H) (mm) .

2) Weight: 2 g.

3) Interface connector 6-pin straight male header, 1.25 mm pitch .

3. Mechanical Dimensions

3.1 . GR-87-T0A, GR-87-T0C outline:

zPicture

zDesign Layout Diagram: (unit mm)

Pin 1

J1 Connector

MMCX Active Ant connector

GPS

Productseries With HOLUX, You never lose the way!

HOLUX Technology, Inc.

1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)

TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw

3.2 . GR-87-T0B, GR-87-T0D outline:

zPicture

zDesign Layout Diagram: (unit mm)

J1 Connector

MMCX Active Ant connector

Pin 1

GPS

Productseries With HOLUX, You never lose the way!

HOLUX Technology, Inc.

1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)

TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw

3.3. Pin assignment of connector :

Table 4-1 is pin list of the 6-Pin Interface Connector. Connector is Male

header 1.25mm pitch DIP R/A type. Actual pin size see appendix B.

Table 4-1 J1 connector pin definition:

Pin Pin Name Function description

1 VCC_5V +3.5~5.5VDC power input

2 TXA

Serial Data output port A(CMOS Level: Voh 2.4V≧

Vol 0.4V Ioh=Iol=2mA)≦

3 RXA

Serial Data input port A(CMOS Level Vih≧0.7*VCC

Vil≦0.3*VCC)

4 RXB

Serial Data input port B(CMOS Level Vih≧0.7*VCC

Vil≦0.3*VCC)

5 GND Power ground

6 TIMEMARK/

RESET (option)

TIMEMARK: 1PPS Time mark output(Vil≦0.2V Pulse

Width 1 usec).

RESET: Reset Input (Active Low)(option function)

GPS

Productseries With HOLUX, You never lose the way!

HOLUX Technology, Inc.

1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)

TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw

3.3.1 VCC_5V

This is the main DC power supply for a +3.3~ 5.5 V engine board.

3.3.2 TXA

This is the main transmitting channel and is used to output navigation and

measurement data for user written software.

3.3.3 RXA

This is the main receiving channel and is used to receive software

commands to the board from user written software.

3.3.4 RXB

This is the auxiliary receiving channel and is used to input differential

corrections to the board to enable DGPS navigation.

3.3.5 GND

GND provides the ground for the board. Connect all grounds.

3.3.6 TIMEMARK (default)/ RESET (option)

This pin default is provides 1 pulse per second output from the GR-87

engine board, which is synchronized to within 1 microsecond of GPS time. The

output is a CMOS 3V positive level signal. Only upon a situation of tracking or

navigating will output once per second. This is not available in Trickle-Power

mode.

The secondary option function is provides an active-low reset input to the

engine board. It causes the engine board to reset and start searching for

satellites. (This second function setting need contact factory).

4. Ordering Information

Model No.

Output Level

(CMOS 3V or

RS-232)

RF interface

output voltage (V)

Back-up battery

(Rechargeable

Lithium)

Power

Saving

Connector

Type

GR-87-T0A CMOS 3V 2.8 Y Y

MMCX(180∘)

GR-87-T0B CMOS 3V 2.8 Y Y

MMCX(90∘)

GR-87-T0C CMOS 3V VCC_IN Y Y

MMCX(180∘)

GR-87-T0D CMOS 3V VCC_IN Y Y

MMCX(90∘)

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