Holux GR-82 User manual

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: [phone] FAX:[phone] E-mail:in[email protected] Website:www.holux.com.tw
1
GPS Engine Board
May. 29, 2006
Version A
Holux Technology Inc.
1F, No. 30, R&D Rd. II, Hsinchu City 300, Science-based Industrial Park, Taiwan.
Phone: [phone] Fax: [phone]
E-Mail: [email protected] Web: www.holux.com.tw
All Right Reserved
User’s Guide
GR-82

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: [phone] FAX:[phone] E-mail:in[email protected] Website:www.holux.com.tw
2
TABLE OF CONTENTS
1. Introduction ................................................................................................. 3
2. Main Feature ............................................................................................... 4
3. Technical Specifications .............................................................................. 5
3.1 Electrical Characteristics.................................................................... 5
3.2 Environmental Characteristics............................................................ 6
3.3 Physical Characteristics ..................................................................... 6
4. Software Interface ....................................................................................... 7
4.1 NMEA Transmitted Messages ............................................................ 7
4.2 RTCM Received Data ...................................................................... 13
4.3 Manufacturing Default: ..................................................................... 14
5. Mechanical Dimensions ............................................................................ 15
5.1 GR-82 outline ................................................................................... 15
5.2 Pin assignment of connector ............................................................ 16
6. Operation and Test .................................................................................... 18
7. Ordering Information ................................................................................. 21
7.1 Products Options.............................................................................. 21
7.2 Accessories ...................................................................................... 22
Appendix A : Reference Design .................................................................... 23
Appendix B : RF Connector........................................................................... 24

GPS
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1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:in[email protected] Website:www.holux.com.tw
3
1. Introduction
The HOLUX GR-82 Engine Board is a total solution GPS receiver, designed based on SiRF
GSC3 architecture. The GR-82 series can connect with Holux’s GPS module: GR-85, GR-86,
GR-87 and GR-88.
GR-82
Computer
RS-232
5V power supply
20-pin
connector
3-pin connector
2.54 mm pitch
HOLUX GR-82 is a high performance, low power consumption, small size, very easy
integrated GPS engine board 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
SiRF SGSC3 chipset solution. The GPS engine board will track up to 20 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-82 engine board is very suitable for the customers who devote
themselves to AVL system integration and location-based service.
The GR-82 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 engine board set via RS-232 compatible bi-directional communication
channels.

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2. Main Feature
zBuild on high performance SiRF GSC3f chipset.
zAverage cold start time under 42 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.
zCMOS 3V or RS-232 output level with one for GPS receiver command message interface,
another one for RTCM-104 DGPS input.
zCompact Size: 40(W) x 50 (L) x 13.5 (H) (mm) (height of connector pin is included)
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.

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3. Technical Specifications
3.1 Electrical Characteristics
3.1.1 General
1). Frequency：L1, 1575.42 MHz.
2). C/A code：1.023 MHz chip rate.
3). Channels：20.
3.1.2 Accuracy (Open Sky)
1). Position：10 meters, 2D RMS.
2). 7 meters 2D RMS, WAAS corrected.
3). 1-5 meters, DGPS corrected.
4). Altitude ：< ± 35 m vertical in term of 95%.
5). Velocity：0.1 meters/second.
6). Time 1 microsecond synchronized to GPS time.
3.1.3 Datum
1). Default：WGS-84.
2). Other Support different datum by request.
3.1.4 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.
3.1.5 Dynamic Conditions
1). Altitude : 18,000 meters (60,000 feet)max.
2). Velocity：515 meters/second (1,000 knots) max.
3). Acceleration：4g, max.
4). Jerk：20 meters/second, max.
3.1.6 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.
4). External 3V backup battery. (optional)

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3.1.7 RF interface
1). Antenna connector type: MCX, MMCX or SMA, 2.8 VDC output. (optional output
VCC_IN)
2). Minimum signal tracked: -159 dBm. (based on SiRF GSC3f spec.)
3). Active antenna
3.1.8 Serial Port
1). Two full duplex serial communication, RS232 or CMOS 3V interface, with user
selectable baud rate (4800-Default, 9600, 19200, 38400).
2). Simple and straightforward connection to PC.
3). NMEA 0183 Version 2.2 ASCII output (GGA, GSA, GSV, RMC (VTG , GLL and ZDA for
optional)).
4). DGPS protocol RTCM SC-104 message types 1, 2 and 9 or WAAS (in USA area) or
EGNOS (in European area)
5). SiRF binary-position, velocity, altitude, status output.
3.1.9 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.
3.2 Environmental Characteristics
1). Operating temperature range -10 to +60 degree C.
2). Storage temperature range -20 to +70 degree C.
.
3.3 Physical Characteristics
1) Active Size: 40(W) x 50(L) x 13.5(H) (mm) (height of connector included)
2) Weight: 9 g.
3) Connector 20-pin straight male header, 2 mm pitch.

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4. Software Interface
The GR-82 interface protocol is based on the National Marine Electronics Association's
NMEA 0183 ASC interface specification, which is defined in NMEA 0183, Version 2.2 and theⅡ
Radio Technical Commission for Maritime Services (RTCM Recommended Standards For
Differential Navstar GPS Service, Version 2.1, RTCM Special Committee No.104).
As soon as the initial self-test is complete, the GR-82 begins the process of satellite
acquisition and tracking automatically. Under normal circumstances, it takes approximately 42
seconds to achieve a position fix, 38 seconds if ephemeris data is known. After a position fix has
been calculated, information about valid position, velocity and time is transmitted over the output
channel.
The GR-82 utilizes initial data, such as last stored position, date, time and satellite orbital data,
to achieve maximum acquisition performance. If significant inaccuracy exists in the initial data, or
the orbital data is obsolete, it may take more time to achieve a navigation solution. The GR-82
Auto-locate feature is capable of automatically determining a navigation solution without
intervention from the host system. However, acquisition performance can be improved as the
host system initializes the GR-82 in the following situation:
zMoving further than 500 kilometers.
zFailure of Data storage due to the inactive internal memory battery.
4.1 NMEA Transmitted Messages
The default communication parameters for NMEA output are 4800 baud, 8 data bits, stop bit,
and no parity.
Table 4-1 NMEA-0183 Output Messages
NMEA Record Description
GPGGA Global positioning system fixed data
GPGLL Geographic position- latitude/longitude
GPGSA GNSS DOP and active satellites
GPGSV GNSS satellites in view
GPRMC Recommended minimum specific GNSS data
GPVTG Course over ground and ground speed
GPMSS Radio-beacon Signal-to-noise ratio, signal strength,

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frequency, etc.
GPZDA PPS timing message (synchronized to PPS)
4.1.1 Global Positioning System Fix Data (GGA)
Table 4-2 contains the values for the following example:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18
Table 4-2 GGA Data Format
Name Example Units Description
Message ID $GPGGA GGA protocol header
UTC Time 161229.487 hhmmss.sss
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table 5-3
Satellites Used 07 Range 0 to 12
HDOP 1.0 Horizontal Dilution of Precision
MSL Altitude (1) 9.0 Meters
Units M Meters
Geoid Separation(1) Meters
Units M Meters
Age of Diff. Corr. second Null fields when DGPS is not used
Diff. Ref. Station ID 0000
Checksum *18
<CR> <LF> End of message termination
(1). SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid heights.
Table 4-3 Position Fix Indicator
Value Description
0 0 Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode, fix valid
3 GPS PPS Mode, fix valid

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4.1.2 Geographic Position with Latitude/Longitude(GLL)
Table 4-4 contains the values for the following example:
$GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C
Table 4-4 GLL Data Format
Name Example Units Description
Message ID $GPGLL GLL protocol header
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
UTC Position 161229.487 hhmmss.sss
Status A A=data valid or V=data not valid
Checksum *2C
<CR> <LF> End of message termination
4.1.3 GNSS DOP and Active Satellites (GSA)
Table 4-5 contains the values for the following example:
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33
Table 4-5 GSA Data Format
Name Example Units Description
Message ID $GPGSA GSA protocol header
Mode 1 A See Table 5-6
Mode 2 3 See Table 5-7
Satellite Used(1) 07 Sv on Channel 1
Satellite Used(1) 02 Sv on Channel 2
…… ….
Satellite Used(1) Sv on Channel 12
PDOP 1.8 Position Dilution of Precision
HDOP 1.0 Horizontal Dilution of Precision
VDOP 1.5 Vertical Dilution of Precision
Checksum *33
<CR> <LF> End of message termination
1. Satellite used in solution.

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Table 4-6 Mode 1
Value Description
M Manual—forced to operate in 2D or 3D mode
A2DAutomatic—allowed to automatically switch 2D/3D
Table 4-7 Mode 2
Value Description
1 Fix Not Available
2 2D
3 3D
4.1.4 GNSS Satellites in View (GSV)
Table 4-8 contains the values for the following example:
$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71
$GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41
Table 4-8 GSV Data Format
Name Example Units Description
Message ID $GPGSV GSV protocol header
Number of Messages(1) 2 Range 1 to 3
Message Number(1) 1 Range 1 to 3
Satellites in View 07
Satellite ID 07 Channel 1 (Range 1 to 32)
Elevation 79 degrees Channel 1 (Maximum 90)
Azimuth 048 degrees Channel 1 (True, Range 0 to 359)
SNR (C/No) 42 dBHz Range 0 to 99, null when not tracking
.... ....
Satellite ID 27 Channel 4 (Range 1 to 32)
Elevation 27 degrees Channel 4 (Maximum 90)
Azimuth 138 degrees Channel 4 (True, Range 0 to 359)
SNR (C/No) 42 dBHz Range 0 to 99, null when not tracking
Checksum *71
<CR> <LF> End of message termination
(1). Depending on the number of satellites tracked multiple messages of GSV data may be required.
4.1.5 Recommended Minimum Specific GNSS Data (RMC)

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Table 4-9 contains the values for the following example:
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10
Table 4-9 RMC Data Format
Name Example Units Description
Message ID $GPRMC RMC protocol header
UTC Time 161229.487 hhmmss.sss
Status A A=data valid or V=data not valid
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Speed Over Ground 0.13 knots
Course Over Ground 309.62 degrees True
Date 120598 ddmmyy
Magnetic Variation(1) degrees E=east or W=west
Checksum *10
<CR> <LF> End of message termination
(1). SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS84 directions.
4.1.6 Course Over Ground and Ground Speed (VTG)
Table 4-10 contains the values for the following example:
$GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E
Table 4-10 VTG Data Format
Name Example Units Description
Message ID $GPVTG VTG protocol header
Course 309.62 degrees Measured heading
Reference T True
Course degrees Measured heading
Reference M Magnetic(1)
Speed 0.13 knots Measured horizontal speed
Units N Knots

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Speed 0.2 km/hr Measured horizontal speed
Units K Kilometers per hour
Checksum *6E
<CR> <LF> End of message termination
(1). SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS84 directions.
4.1.7 MSK Receiver Signal (MSS)
Table 4-11 contains the values for the following example:
$GPMSS,55,27,318.0,100,*66
Table 4-11 MSS Data Format
Name Example Units Description
Message ID $GPMSS MSS protocol header
Signal Strength 55 dB dB SS of tracked frequency
Signal-to-Noise
Ratio
27 dB SNR of tracked frequency
Beacon Frequency 318.0 kHz Currently tracked frequency
Beacon Bit Rate 100 100 bits per second
Checksum 66
<CR> <LF> End of message termination
Note – The MSS NMEA message can only be polled or scheduled using the MSK NMEA input
message.
4.1.8 ZDA—SiRF Timing Message
Outputs the time associated with the current 1 PPS pulse. Each message will be output
within a few hundred ms after the 1 PPS pulse is output and will tell the time of the pulse that just
occurred.
Table 4-12 contains the values for the following example:
$GPZDA,181813,14,10,2003,00,00*4F
Table 4-12 ZDA Data Format
Name Example Units Description

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Message ID $GPZDA ZDA protocol header
UTC Time 181813 Either using valid IONO/UTC or
estimated from default leap seconds
Day 14 01 TO 31
Month 10 01 TO 12
Year 2003 1980 to 2079
Local zone hour 00 knots Offset from UTC (set to 00)
Local zone hour 00 Offset from UTC (set to 00)
Checksum 4F
<CR> <LF> End of message termination
4.2 RTCM Received Data
The default communication parameters for DGPS Input are 9600 baud, 8 data bits, stop bit,
and no parity. Position accuracy of less than 5 meters can be achieved with the GR-82 by using
Differential GPS (DGPS) real-time pseudo-range correction data in RTCM SC-104 format, with
message types 1,2, or 9. As using DGPS receiver with different communication parameters,
GR-82 may decode the data correctly to generate accurate messages and save them in
battery-back SRAM for later computing.

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4.3 Manufacturing Default:
Parameter Com A Com B
Input protocol NMEA RTCM SC-104
Output protocol NMEA None
Baud rate 4800 9600
Parity None
Stop bit 1 1
Data bits 8 8
Datum WGS84
Protocol GGA,GSA,GSV,RMC or
by demand
Additional Software
SiRFdemo is the Evaluation Receiver configuration and monitoring software provided with
the GR-82. This software can be used to monitor real-time operation of the GR-82 Receiver, log
data for analysis, upload new software to the Receiver, and configure the Receiver operation.

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5. Mechanical gDimensions
5.1 GR-82 outline: Use GR-88 GPS module.
zPicture
zDesign layout diagram: (unit mm)
40.0 mm.
34.0 mm.
43.5 mm.
18.0 mm.
1
220
19
11.8 mm.
3.6 mm.
2.0 mm.
3.25 mm. 3.0 mm.
50.0 mm.
2.0 mm.
0.8 mm.
5.8 mm.
1.5 mm.
11.0 mm.

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5.2 . Pin assignment of connector :
J4, 20-pin connector (2 mm pitch) pin definition
Pin Pin Name Function description
1 NC No function
VCC_5V +3.3 ~ +5V DC power input for -5 model
2
NC No function for -3 model
3 NC No function
NC No function for -5 model
4
VCC_3V regulated 3V power input for -3 model
5 nRESET Reset input, active low
6 GPIO1 General purpose I/O pin
7 GPIO2 General purpose I/O pin
8 GPIO3 General purpose I/O pin
9 GPIO4 General purpose I/O pin, LED flash when tracking
10 GND Ground
11 TXA Serial Data output A
12 RXA Serial Data input A
13 GND Ground
14 TXB Serial Data output B
15 RXB Serial Data input B
16 GND Ground
17 GPIO5 General purpose I/O pin, BOOT_SEL, Reserved for re-programming
flash.
18 GND Ground
19 TIMEMARK 1 PPS time mark output
20 NC No function
J7, 3-pin connector (2.54 mm pitch) pin definition
Pin Pin Name Function description
1 TXDA Serial Data output A, RS-232
2 RXDA Serial Data input A, RS-232
3 GND Ground
J8, 3-pin connector (2.54 mm pitch) pin definition
Pin Pin Name Function description
1 TXDB Serial Data output B, RS-232

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2 RXDB Serial Data input B, RS-232
3 GND Ground
J10, 2-pin connector (2.54 mm pitch)
BOOT Selection. Short these two pins at power on stage will set CPU into boot mode. Used for
flash program update.

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6. Operation and Test
The customers can use HOLUX GPSView.exe to test the engine board. GPSViewer.exe is
compatible with Microsoft Pocket PC or other operation system alike.
1). Install Microsoft ActiveSync to your PC, refer to your Pocket PC manual for installation
procedure, as Fig. 6.1.
2). Setup your Pocket PC cradle to Desktop PC UART port. The Microsoft ActiveSync will
detect your Pocket PC automatically.
Setup your Pocket PC cradle to Desktop PC UART port. The Microsoft ActiveSync will detect
your Pocket PC automatically, as Fig. 6.1.
(Fig. 6.1)
3). Double click the GPSViewer.exe on your PC, then Holux GPSViewer.exe program will
install automatically, as Fig. 6.2.
(Fig. 6.2)

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4) Open “GPSViewer” on PC, as Fig. 6.3.
(Fig. 6.3)
5) The following window is show after executing
6) GPSViewer, as Fig. 6.4.
(Fig. 6.4)
7) Setup Baud rate: 4800, then push “Scan” bottom to scan your COM Port . Select your
COM Port (COM1 ~ COM10), then push “Open GPS” bottom, as Fig. 6.5, Fig. 6.6, and Fig.
6.7.
(Fig.6.5) (Fig.6.6) (Fig.6.7)

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8) Select “GPS Status” to show the satellite diagram like below, as Fig. 6.8.
(Fig. 6.8)