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SG-288 Manual V1.1

Dagama Confidential

© All Rights Reserved

SG-288 Manual V1.1

3

1.3 Electrical Characteristics

General

Frequency

L1, 1575.42 MHz

C/A code

1.023 MHz chip rate

Channels

20 channels all in view tracking

Antenna

internal

Sensitivity

Tracking

-159 dBm typical

Accuracy

Position

< 10 meters, 2D RMS
< 7 meters 2D RMS, WAAS corrected
1-5 meters, DGPS corrected

Time

1 microsecond synchronized to GPS time

Datum

Default

WGS-84

Acquisition Rate (Open Sky)

Hot start

1 sec, average

Warm start

38 sec, average

Cold start

42 sec, average

Reacquisition

0.1 sec, average

Dynamic Conditions

Protocol message

NMEA-0183

Default NMEA

Altitude

< 18,000 meters (60,000 feet)

Velocity

< 515 meters/sec (1,000 knots)

Acceleration

< 4 G

Jerk

20 meters/sec max

GPS protocol

GGA, GSA, GSV, RMC, 19200 baudrate, (GLL, VTG,
and ZDA optional)
8 bits data, 1 stop bit, no parity.

Bluetooth Characteristics

BT Compliant

Version1.1

RF Tx Power

Class 2 (4 dBm max)

Receiver sensitivity

-80 dBm with BER<0.1%

Communication distance

10 meter typically

Communication profile

Serial Port Profile (SPP)

Power Consumption

Main power input

5.0 ± 5% VDC input

Operation Current

65 mA average in normal mode

Summary of Contents for SG-288

Page 1: ...splay Display Display Display Bluetooth Bluetooth Bluetooth Bluetooth GPS GPS GPS GPS Receiver Receiver Receiver Receiver V1 1 Dagama Dagama Dagama Dagama Technology Inc Room 1159 No 66 miaojing Road...

Page 2: ...n 2 1 1 Overview 2 1 2 Features 2 1 3 Electrical Characteristics 3 2 Hardware 4 2 1 Dimension 4 2 2 Accessories 4 2 3 Description 5 3 Operation 7 3 1 Getting Start 7 3 2 GPS Viewer for Testing 8 3 3 F...

Page 3: ...d a battery power are necessary to the unit With its low power consumption the receiver tracks up to 20 satellites at a time while offering fast time to first fix re acquires satellite signals less th...

Page 4: ...average Warm start 38 sec average Cold start 42 sec average Reacquisition 0 1 sec average Dynamic Conditions Protocol message NMEA 0183 Default NMEA Altitude 18 000 meters 60 000 feet Velocity 515 met...

Page 5: ...oC to 60 oC Storage temperature range 20 oC to 70 oC Charging temperature range 0 oC to 45 oC Operating humidity 5 to 95 no condensing Dimension 83 mm L x 45 2 mm W x 20 5 mm H Weight 55 g Battery no...

Page 6: ...el on the front cover shows time longitude latitude height speed battery status and satellite signal status Detailed LED and LCD indications are described in next paragraph The battery on off switch i...

Page 7: ...mal operation status press button B for 1 second and then release to turn off on Bluetooth 5 Setup 1 Press button A for 2 seconds then release to enter into setup menu 2 Press Select for 1 second to i...

Page 8: ...on Step 2 Charge Please charge the battery to full capacity when first time to use Connect the attached adaptor cord to the mini USB jack as shown in the following figure The battery indication is wit...

Page 9: ...r host devices to access this BT GPS unit in paired mode The Blue LED indicates following Bluetooth radio status a LED flashes at 3 seconds interval for standby mode b LED flashes at 0 2 second interv...

Page 10: ...r sends valid navigation information over output channels These data include 1 Latitude longitude altitude 2 Velocity 3 Date time 4 Error estimates 5 Satellite and receiver status 4 Warranty The GPS s...

Page 11: ...g of an asterix and a 2 digit hex value representing the checksum There is no comma preceding the checksum field When present the checksum is calculated as a bitwise exclusive of the characters betwee...

Page 12: ...de 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 Indictor 1 0 Fix not available or invalid 1 GPS SPS mode fix val...

Page 13: ...487 A A 41 The GPGLL message structure is shown below Field Example Unit Notes Message ID GPGLL GLL protocol header Latitude 3723 2475 ddmm mmmm N S Indicator N N north or S south Longitude 12158 341...

Page 14: ...ure is shown below 1 Satellites used in solution Field Example Unit Notes Message ID GPGSA GSA protocol header Mode A M Manual forced to operate in selected 2D or 3D mode A Automatic switching between...

Page 15: ...of messages maximum 3 Message number 1 Sequence number range 1 to 3 Satellites in view 07 Number of satellites currently in view Satellite ID 07 Channel 1 ID range 1 to 32 Elevation 79 degree Elevati...

Page 16: ...elds marked in italic red apply only to NMEA version 2 3 and later in this NMEA message description Field Example Unit Notes Message ID GPMSS MSS protocol header Signal Strength 55 dB SS of tracked fr...

Page 17: ...arked in italic red apply only to NMEA version 2 3 and later in this NMEA message description Field Example Unit Notes Message ID GPRMC RMC protocol header UTC Time 161229 487 hhmmss sss Status A A Da...

Page 18: ...r ground data are geodetic WGS84 directions 2 Fields marked in italic red apply only to NMEA version 2 3 and later in this NMEA message description Field Example Unit Notes Message ID GPVTG VTG protoc...

Page 19: ...ZDA message format is shown below Field Example Unit Notes Message ID GPZDA ZDA protocol header UTC Time 181813 Either using valid IONO UTC or estimated from default leap seconds UTC Day 14 01 to 31 d...

Page 20: ...Indiana East Bogota Lima Quito 5 4 Atlantic Time Canada Caracas La Paz Santiago 4 Newfoundland 3 5 2 5 Brasilia Buenos Aires Georgetown Greenland 3 Mid Atlantic 2 Azores Cape Verde Islands 1 Greenwic...

Page 21: ...i Chennai Kolkata 5 5 Almaty Dhaka Colombo Astana Sri Jayawardenepura Novosibirsk 6 Bangkok Hanoi Jakarta Krasnoyarsk 7 Beijing Changqing Hong Kong Uramqi 8 Perth Singapore Taipei Beijing Chongqing Ho...

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