TERSUS David User manual

User Manual
Version V1.0-20180525
Sales & Technical Support:
[e-mail] & [e-mail]
More details, please visit www.tersus-gnss.com
User Manual
For David GNSS Receiver
©2018 Tersus GNSS Inc. All rights reserved.

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Table of Content
1. Overview....................................................................................................................8
1.1 Introduction ............................................................................................................... 8
1.2 Receiver Features....................................................................................................... 8
1.3 Brief Introduction of GNSS and RTK........................................................................... 9
2. Devices in David Package................................................................................... 11
2.1 Rove Kit Mobile Mode................................................................................................... 12
2.1.1 David Receiver............................................................................................... 14
2.1.2 GNSS Antenna............................................................................................... 14
2.1.3 The 2pin-USB Power Cable......................................................................... 15
2.1.4 COMM1-bluetooth Module ........................................................................... 16
2.1.5 Bracket for Rover........................................................................................... 16
2.1.6 GNSS Antenna Connector........................................................................... 17
2.1.7 COMM2-7pin-USB & DB9 Data Cable....................................................... 17
2.1.8 Other accessories.......................................................................................... 18
2.2 Rover Kit with 1W Radio Station.............................................................................. 20
2.2.1 RS900C 1W/915MHz Radio ........................................................................ 22
2.3 Rover Kit with 2W Radio Station.............................................................................. 22
2.3.1 RS400L2 2W/460MHz Radio....................................................................... 24
2.3.2 COMM2-7pin-USB & 5pin Cable................................................................. 26
2.4 Base Kit Mobile Mode.............................................................................................. 26
2.4.1 Bracket for Base............................................................................................. 28
2.4.2 Tape Meter...................................................................................................... 28
2.5 Base Kit with 1W Radio Station................................................................................ 29
2.6 Base Kit with 2W Radio Station................................................................................ 30
2.7 Base Kit with 30W Radio Station.............................................................................. 31
2.7.1 30W Radio ...................................................................................................... 33
2.7.2 Other cables ................................................................................................... 34
3. General operation.................................................................................................. 36
3.1 Install the GNSS antenna............................................................................................... 36
3.2 Power on David ............................................................................................................. 36

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3.3 Communication between Android phone and David.................................................... 37
3.3.1 With Wires....................................................................................................... 38
3.3.2 With an External Bluetooth........................................................................... 40
3.4 FW Upgrade & Auth code.............................................................................................. 41
3.4.1 Firmware Updates .............................................................................................. 42
3.4.2 Auth Code............................................................................................................ 45
3.5 Download Files from Internal eMMC Card.................................................................... 46
3.6 Input command directly to the GNSS board............................................................ 49
4. Introduction of Nuwa®........................................................................................... 51
5. Specification........................................................................................................... 53
5.1 David Receiver............................................................................................................... 53
5.2 ANTENNA AX3702 (HG)................................................................................................. 56
5.3 1W Radio RS900C .......................................................................................................... 57
5.4 2W Radio RS400L2......................................................................................................... 59
5.5 30W Radio RS400L30..................................................................................................... 61
6. Typical operating...................................................................................................... 64
6.1 David as a Rover to receive corrections from Internet............................................ 64
6.2 David as a Base to transmit corrections to Internet ................................................ 67
6.3 Radios Transmit RTK Corrections between Two Davids .......................................... 70
6.4 Data Collection for Post Processing ......................................................................... 72
7. Terminology ............................................................................................................. 75

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List of Figures
Figure 1 Outlook of David GNSS receiver..........................................................................8
Figure 2 Outline of David System........................................................................................9
Figure 3 Corrections transmitted via Internet...................................................................10
Figure 4 Corrections transmitted with radios....................................................................10
Figure 5 David in the box....................................................................................................11
Figure 6 Field photo 1 - 1....................................................................................................12
Figure 7 Field photo 1 - 2....................................................................................................13
Figure 8 David Receiver......................................................................................................14
Figure 9 AX3702 (HG) antenna..........................................................................................15
Figure 10 RF cable...............................................................................................................15
Figure 11 2pin-USB Power Cable......................................................................................16
Figure 12 Bluetooth Module................................................................................................16
Figure 13 Bracket for Rover................................................................................................17
Figure 14 GNSS Antenna Connector................................................................................17
Figure 15 COMM2-7pin-USB & DB9 Data Cable............................................................18
Figure 16 USB TypeA Male to DB9 Male cable..............................................................18
Figure 17 USB TypeA Male to USB TypeA Male cable.................................................19
Figure 18 USB TypeA Female to USB (Micro + Type C) OTG cable ..........................19
Figure 19 Height MeasureAccessory...............................................................................19
Figure 20 Battery Bank........................................................................................................20
Figure 21 Field Photo 2 - 1 .................................................................................................20
Figure 22 Field Photo 2-2....................................................................................................21
Figure 23 RS900C 1W Radio Station ...............................................................................22
Figure 24 Field Photo 3 - 1 .................................................................................................23
Figure 25 Field Photo 3 - 2 .................................................................................................23
Figure 26 2W /460MHz Radio............................................................................................25
Figure 27 COMM2-7pin-USB & 5pin Cable......................................................................26
Figure 28 Field Photo 4.......................................................................................................27
Figure 29 Bracket for Base.................................................................................................28
Figure 30 Tape Meter...........................................................................................................29
Figure 31 Field Photo 5.......................................................................................................29
Figure 32 Field Photo 7 - 1 .................................................................................................31
Figure 33 Field Photo 7 - 2 .................................................................................................32
Figure 34 30W Radio Station.............................................................................................33
Figure 35 Power cable for 30W radio................................................................................34
Figure 36 COMM cable for 30W radio ..............................................................................35
Figure 37 David GNSS receiver installation hook...........................................................35
Figure 38 Outline of Android phone to David with Wires ...............................................38
Figure 39 Outline of Android phone to David with Bluetooth.........................................40
Figure 40 Outline of David connected to a Computer ....................................................41
Figure 41 Download file from eMMC card........................................................................46
Figure 42 Booting up page..................................................................................................51
Figure 43 Four Main Windows of Nuwa............................................................................52

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Figure 44 Panel of David.....................................................................................................54
Figure 45 Pin Definition of the COMM1/COMM2/DC ports ...........................................55
Figure 46 Outline of Android phone to David with Wire .................................................65
Figure 47 Outline of Android phone to David with Wire .................................................67
Figure 48 Outline of Base/Rover with Radios..................................................................70
Figure 49 Outline of Static Data Collection ......................................................................73

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List of Tables
Table 1 The document / software used in this user manual.............................................6
Table 2 Seven David Variants.............................................................................................11
Table 3 Devices in rover mobile mode..............................................................................13
Table 4 Definition of LEDs...................................................................................................14
Table 5 Functions of COMM2-7pin-USB & DB9 Data Cable.........................................18
Table 6 Rover Kit with 1W Radio Station..........................................................................21
Table 7 LED Definition.........................................................................................................22
Table 8 Rover Kit with 2W Radio Station..........................................................................24
Table 9 Button Manual.........................................................................................................25
Table 10 LED Definition.......................................................................................................26
Table 11 Base Kit Mobile Mode..........................................................................................27
Table 12 Base Kit with 1W Radio Station.........................................................................30
Table 13 Base Kit with 30W Radio Station.......................................................................32
Table 14 The Definition of the Control Buttons................................................................33
Table 15 Definition of LEDs ................................................................................................34
Table 16 Detailed steps.......................................................................................................39
Table 17 Detailed steps.......................................................................................................40
Table 18 Preparation for FW update .................................................................................42
Table 19 Detailed Steps for FW update............................................................................43
Table 20 Detailed Steps to download files from eMMC card.........................................46
Table 21 Input commands to the BX306 directly.............................................................49
Table 22 David GNSS Performance..................................................................................53
Table 23 Pin Definition ........................................................................................................55
Table 24 Antenna AX3702 (HG).........................................................................................56
Table 25 Specification for RS900C....................................................................................57
Table 26 Specification for RS400L2..................................................................................59
Table 27 RS400L30 Radio Specification..........................................................................61
Table 28 Detailed steps for rover receive corrections from Internet.............................65
Table 29 Detailed steps for Base transmit corrections to Internet ................................68
Table 30 Detailed steps for David with Radios ................................................................70
Table 31 Detailed Steps for Static Data Collection..........................................................73
Table 32 List of terminology................................................................................................75

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Notices
The following notices apply to DAVID receiver.
Changes or modifications to this equipment not expressly approved by
Tersus could void the user‟s authority to operate this equipment or
even has risk to damage the DAVID.
Conventions
The following conventions are used in this manual:
!
Information that supplements or clarifies text.
A caution that actions, operation or configuration may lead to incorrect
or improper use of the hardware.
NUWA is Tersus survey app, four tabs (Project, Device, Survey and Tools) are
provided in the Nuwa® main window. So, in chapter 0, all the operations in the
Survey software will start from these four tabs.
In all the figures, a line with two arrows at the two sides means it‟s a cable. A
line with one arrow gives the installation direction.
Table 1 The document / software used in this user manual
Name
Description
Link
Log & Command
document
Document giving all the
loggings output from David
and all the commands to
David
https://www.tersus-gnss.com/ass
ets/upload/file/20180420120508
17.pdf
Tersus GNSS
Center
Graphical tool to
communicate with David
https://www.tersus-gnss.com/ass
ets/upload/file/20180418153351
742.zip
Nuwa
Survey application running
in the Android platform,
David can be configured
with Nuwa.
Tersus Geomatics
Office
Post processing tool for
static data
https://www.tersus-gnss.com/ass
ets/upload/file/20180418153011
5.rar
A warning that actions, operation or configuration may result in
regulatory noncompliance, safety issues or equipment damage.

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Support
If you have a problem and cannot find the information you need in the product
documentation, request technical support using the Tersus website at
www.tersus-gnss.com, or mail to [email protected]

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1. Overview
1.1Introduction
Tersus DAVID is a cost-efficient, palm-sized GNSS receiver, mainly for the
mass survey market, but also for UAV/AGV/Agriculture application.
Nuwa, a surveyApp on Android system, is working with David, which can
communicate with an Android platform such as a phone or tablet via USB
cable or an external Bluetooth module. The David can work as a base or a
rover, it can support real-time RTK positioning as well as saving data for PPK
application. Up to 4GB on-board EMMC card makes it easy to save data for
PPK.
The RS-232 serial port, IP67 standard and the external Bluetooth module can
remove most of the inconvenience for field workers. All the operating can be
done in the App Nuwa except downloading raw measurement data file, which
will be done with Tersus GNSS Center, see Table 1 and section 3.5 Download
Files from Internal eMMC Card for detail.
Figure 1 Outlook of David GNSS receiver
1.2Receiver Features
Supports GPS L1/L2, BDS B1/B2 and GLONASS G1/G2.
Support RTCM2.3/3.x, CMR, CMR+ corrections.

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Easy to connect an external powerful radio for longer range.
Solution rate can be 5Hz.
20Hz raw measurements output for post processing.
The accuracy of carrier phase can be 1mm.
On-board 4GB eMMC card for data collection
Static post-processing for mm-level accuracy.
Bluetooth module makes wireless connection.
Input power range is 5 - 12V, connect to battery bank directly.
IP67 for water & dust proof, work reliably in harsh condition
The Lemo connectors support mis-installation avoidance.
1.3Brief Introduction of GNSS and RTK
Tersus BX306 GNSS receiver is integrated in David, the board is receiving the
GNSS signals from satellites and RTK corrections from the base, and is
outputting cm-level position, velocity and time. Figure 2 shows David system;
see https://www.tersus-gnss.com/product/bx306-oem-board for more about
BX306 receiver.
Figure 2 Outline of David System