UNICORECOMM UB4B0 User manual

Unicorecomm Confidential
WWW.UNICORECOMM.COM
INSTALLATION AND OPERATION
USER MANUAL
Data subject to change without notice.
Communications, Inc.
High Precision Board
UB 4B0
ALL-constellation GNSS
Copyright© 2009-2021, Unicore

i
Revision History
Version
Revision History
Date
Ver. 1.0
First release
Aug. 2017
Ver. 1.1
Update the Dimension of UB4B0
Feb.2019
R1.3
Revise mechanical spec/add HW design notes/remove
MEMS info
2019-08-28
R1.4
Add the shield dimension
2019-10-12
R2.0
Align the installation diagram with HW ver3.1
2020-02-20
R2.1
Update Copyright time
2020-04-07
R2.2
Update BDS frequency
2020-06-30
R2.3
Fix typo and update BDS/GPS frequencies
2020-10-22
R2.4
Add the table of absolute maximum rating
2021-04-09
R2.5
Correct the indicating sequence of the LED indictor in
Chapter 4
2021-07-06
R2.6
Delete the remaining information about MEMS;
Update the maximum value of power supply
2021-08-06
Disclaimer
Information in this document is subject to change without notice and does not
represent a commitment on the part of Unicore Communications, Inc. No part of this
manual may be reproduced or transmitted in any form or by any means, electronic
or mechanical, including photocopying and recording, for any purpose without the
express written permission of a duly authorized representative of Unicore
Communications, Inc. The information contained within this manual is believed to be
true and correct at the time of publication.
© Copyright 2009-2021 Unicore Communications, Inc. All rights RSV.

UB4B0 User Manual
ii
Foreword
This <User Manual> offers you information in the features of the hardware, the
installation, specification and use of UNICORECOMM UB4B0 product.
This manual is a generic version. Please refer to the appropriate part of the manual according to
your purchased product configuration, concerning CORS, RTK and Heading.
Readers it applies to
This <User Manual> is applied to the technicists who know GNSS Receiver to some
extent but not to the general readers.

i
Contents
1OVERVIEW...........................................1
1.1 KEY FEATURES ........................................................................................................................1
2HARDWARE DESIGN IN CONSIDERATIONS .............2
3INSTALLATION .......................................2
3.1 PACKAGE INSPECTION.............................................................................................................2
3.2 ESD PROTECTION...................................................................................................................3
3.3 BOARD OVERVIEW...................................................................................................................3
3.4 INSTALLATION GUIDE ...............................................................................................................4
4LED INDICATORS.....................................8
5PC UTILITY CONFIGURATION (UPRECISE) ..............9
5.1 OVERVIEW ...............................................................................................................................9
5.2 OPERATION STEPS ................................................................................................................11
6FIRMWARE UPDATE (WINCONFIG) ....................12
7HARDWARE INTERFACE .............................16
7.1 ABSOLUTE MAXIMUM RATING................................................................................................16
7.2 POWER INPUT........................................................................................................................16
7.3 RF INPUT...............................................................................................................................16
7.4 EXTERNAL CLOCK INPUT.......................................................................................................16
7.5SERIAL PORTACCESS...........................................................................................................16
7.6 PIN FUNCTION........................................................................................................................17
APPENDIX I MECHANICAL DRAWING ....................20
APPENDIX II TECHNICAL SPECIFICATIONS ...............22

1
1 Overview
Thanks for purchasing and using UB4B0 GPS/BDS/GLONASS/Galileo All-Constellation
All-Frequency High Precision OEM Board. The board employs the new generation
all-constellation multi-core high precision SoC—NebulasII (432 channel tracking), which is
based on the mature baseband technology, with 55nm low power consumption, in which
built the broadband ADC and anti-interference unit, integrating two 600MHz ARM
processors and a special high-speed floating-point processor, and providing more
powerful satellite navigation signal process ability.
UB4B0 provides millimeter-level carrier-phase observation data and centimeter-level RTK
position output, supports advanced multi-path mitigation and low angle tracking; UB4B0 is
suitable for high precision surveying and mapping application, especially for geodetic
surveying, engineering survey, deformation monitoring, mechanical control,
meteorological monitoring, precision agriculture, continuous operation reference station
(CORS), advanced instantaneous RTK and long-distance RTK, etc.
Figure 1-1 UB4B0 Board
1.1 Key Features
Based on NebulasII new generation multi-system multi-frequency
high-performance SoC
432 super channels and dedicated fast acquisition engine
Support BDS, GPS, GLONASS, Galileo and QZSS, etc.
Hardware size compatible with current GNSS OEM boards

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UB4B0 User Manual
Support GPS/BDS/GLONASS/Galileo single system positioning and multi-system
positioning
Support advanced multi-path mitigation and low angle tracking
Support rover station RTK
Millimeter-level carrier-phase observation data
High reliability, high stability, suitable for challenging environment
Support RS232, Ethernet, 1PPS, external clock input
2 Hardware Design in Considerations
To keep UB4B0 functioning normally, the following signals need to be connected correctly:
The module's VCC should be monotonic when powered on, the initial level should
be lower than 0.4V, and the undershoot and ringing should be guaranteed within 5%
VCC
It is recommended to use a power chip with current output capacity greater than
2A to power the board
3 Installation
This section contains the list of the product package and the details of product installation.
3.1 Package Inspection
Please check the contents of the package carefully after receiving the package of UB4B0：
UB4B0 board and EVK suite (or evaluation board) (or enclosure)
User manual (CD attached)
Command manual (CD attached)
UPrecise software (CD attached)
MMCX antenna cable
Cross serial port cable

3
3.2 ESD Protection
A lot of components on UB4B0 are susceptible to electrostatic damage, which affects IC
circuits and other components. Please follow the instructions below for ESD protection
before open the plastic package:
Electrostatic discharge (ESD) can damage components. Please use an anti-static
work bench, a conductive foam pad, and at the same time, wearing an anti-static wrist
strap. If ESD workstation is notavailable, wear an anti-static wrist strap and attach it to
metal parts of your industrial PC in order to obtain protection against static electricity.
Please use the edge of the board, avoiding to touch the components on the board
while fetching or putting the boards
Please carefully check for obviously loose or damaged components after removing
the package from the boards. If you have any questions, please contact your local
dealer.
Please save the package boxes and plastic containers for storage and transport.
3.3 Board Overview
RF
Section Nebulas External CPU I/O
Antenna
External
Clock
Figure 3-1 Structure Diagram

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1. RF Part
The receiver gets filtered and enhanced GNSS signals from the antenna via a coaxial
cable. The RF part converts the RF input signals into the IF signals, and converts IF
analog signals into digital signals required for NebulasII chip (UC4C0).
2. NebulasII SoC (UC4C0)
NebulasII (UC4C0) is Unicore’s new generation high precision GNSS SoC with 55nm low
power design, supports up to 12 digital intermediate frequency or 8 analog intermediate
frequency signals, which can track 12 navigation signals with 432 channels.
3. 1PPS
UB4B0 provides 1 PPS with adjustable pulse width and polarity and 1 output pulse width.
4. Event
1
UB4B0 provides 1 Event Mark Input.
5. I/O
Power input, data communication port, pulse trigger, LED etc.
3.4 Installation Guide
UB4B0 is delivered as a board, users can flexibly assemble according to the scenario and
the market need. Figure below shows the typical installation of UB4B0 with evaluation kit
(EVK), users can also use other enclosures to install receiver, using the same method.
1
Supported on customized versions

5
Figure 3-2 UB4B0 Installation
For efficient installation, please prepare the following items before installation:
UB4B0 EVK suite (or evaluation board) (or enclosure)
User manual
Command manual
UPrecise software (CD attached)
Qualified antenna
MMCX antenna cable
PC or Laptop with serial ports (Win7 and above), with UPrecise installed
After the above preparation is made, please follow the steps below to install:
Following the steps below to install the device:
1. Align UB4B0 positioning holes and pins with EVK, and fix UB4B0 on the EVK. EVK
provides power supply and standard communication interface for the board, to

UB4B0 User Manual
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communicate with peripheral devices (such as PC, USB devices
2
, and so on).
Figure 3-3 Installation Step 1
2. Select a GNSS antenna with appropriate gain, and mount it in an open sky area.
Connect the antenna to J1 MMCX port of UB4B0 via coaxial RF cable.
Figure 3-4 Installation Step 2
NOTE: The RF connector on the board is MMCX, please select the appropriate cable. The
signal gain to the RF connector should be within 25 to 35dB. The Antenna connector
provides 5V DC antenna feed.
3. Connect the PC with EVK through serial ports, or through Ethernet ports.
2
Only for manufactory test
Antenna RF input

7
Figure 3-5 Installation Step 3
Figure 3-6 Installation Step 3
4. Connect a 12V adapter with the EVK power input, and switch on to power the device

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Figure 3-7 Installation Step 4
5. Start UPRECISE on the PC
6. Refer to UPRECISE online help to send commands or log data for the receiver
Note: If the board has not been in use for a long time, or the distance between the last
location and the current location is above 1000Km, a slower fix may occur. In that case,
please use the FRESET command to clear the older ephemeris and Almanac information (this
command will also clear the Board setup information). After the FRESET command is
executed, the board will be reset, it will take 15 minutes to collect new ephemeris and
Almanac information.
4 LED Indicators
There is a double color LED indicator on UB4B0, which can indicate the working status of
the board.
No
Status
Red
Green
Remark
1
Single
Point
Positioning
BDS
Off
0.25s
Green Fast Flash
2
Multi-System
0.25s
0.25s
Orange Fast Flash (red and
green on)
3
Differential
Positioning
BDS
Off
1s
Green Slow Flash
4
Multi-System
1s
1s
Orange Slow Flash (red and
green on)
5
Insufficient satellites
1s
Off
Red Slow Flash
6
Status Switch
Blank 1s
Blank 1s
Time interval between two
positioning status
7
Abnormal
0.25s
Off
Red Fast Flash, abnormal
status other than 1-5
Power

9
No
Status
Red
Green
Remark
8
Power on
Red
Stead on
Off
Switch into other status after
starting up.
1. For normal status, the indicating sequence is: power on -> status switch -> insufficient
satellites -> status switch…… insufficient satellites -> status switch -> single point
positioning -> status switch……single point positioning -> status switch -> differential
positioning -> status switch -> differential positioning……
2. If abnormal status occurs on the board, the indicating sequence is: power on ->
abnormal, or normal -> abnormal
5 PC Utility Configuration (UPrecise)
5.1 Overview
UB4B0 Unicore UPRECISE (Control and Display Tool) provides a user-friendly graphical
interface to control and display the operation of your receiver. User can access the
Figure 4-1 LED Indicators

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functionality and information just through several clicks.
The following features are included in UPRECISE：
Connecting the receiver, configuring the baud rate
Graphic window for displaying Position of satellite, PRN, and Signal/Noise Ratio
(Constellation View)
Displaying the historical and present Trajectory of the receiver, as well as the
position, velocity, and time (Trajectory View)
Graphic interface for data logging, sending commands to the Receiver (Logging
Control View)
Console window for sending command to receiver (Console View)
Sending commands to the Receiver
The trajectory view for displaying the present point and the past point of the
Receiver
Upgrading the firmware
TTFF test
Figure 5-1 UPrecise Overview

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5.2 Operation Steps
1. Follow the tutorial to install the board, and turn on the EVK switch
2. Click file -> connect the serial port, set the baud rate, the default baud rate is
115200bps
Figure 5-2 Configure Baud Rate
3. Click the receiver settings button to configure the NMEA message output. It is
recommended to configure GPGGA, GPGSV, and other messages.
Figure 5-3 Configure NMEA Output
4. Click the receiver settings button, configure the NMEA message output, and click
send. It is recommended to configure GPGGA, GPGSV, and other statements. or

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5. In the dialog window, click on "Send all Message" to complete all the NMEA
message output (update rate 1Hz). Right click in the data session window to
adjust: output log font size, stop / resume log output, or clear log content
6. Configure or type commands according to requirements in various UPrecise views
6 Firmware Update (WinConfig)
WinConfig (in the attached CD) software is used for the remote update of UB4B0, please
follow the steps below to install the software:
During the firmware update of the board, please stop all the operations to the
device, including the cutoff of the power supply.
Step 1: Click the program icon to run the software:
Figure 6-1 WinConfig Welcome Interface
Step 2: Click “Next” to browse the firmware update package:

13
Figure 6-2 Select Firmware Update Package
Step 3: Click “Next” to display the communication type:
Figure 6-3 Select Communication Type
Step 4：Select the communication type as through Serial Port (COM), click “Next” to
configure:

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Figure 6-4 Serial Port Communication Configuration
Please use COM1 to update firmware.
Step 5: After the configuration of the COM port, click “Next” to prompt the configuration
summary dialog:
Figure 6-5 Serial Port Upgrade Configuration Summary
Step 6：Check the summary to make sure the receiver is correctly configured, then click
“Finish” to prompt the Upgrade window:

15
Figure 6-6 Firmware Upgrade Window
Step 7: Click “Upgrade” to start the firmware upgrading process:
Figure 6-7 Serial Port Upgrade Success
The "Upgrade" button is gray and can’t be clicked while the receiver is in the
upgrading process, unless the upgrade is complete, or an error occurs during the
upgrade process.
Step 8: Check if the firmware upgrading process is finished successfully.

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7 Hardware Interface
This chapter is a brief introduction about UB4B0 receiver I/O port and Electrical
Characteristics, please connect correctly to avoid unnecessary damage.
7.1 Absolute Maximum Rating
Item
Pin
Min
Max
Unit
Power Supply (VCC)
Vcc
-0.3
3.6
V
VCC Ripple (Rated Max.)
Vrpp
0
50
mV
LVTTL Voltage Input
Vin
-0.3
3.6
V
Antenna RF Input Power Consumption
ANT_IN input power
+15
dBm
7.2 Power Input
Index
Description
Acceptable Velocity Input Range
3.3V +5%/-3%
Note: Please avoid switching power supply frequently, it is recommended that the
switching interval is more than 5s.
7.3 RF Input
Index
Description
RF Input
-85 dBm ~ -105 dBm
Signal Input
BDS B1I/B2I/B3I/B1C/B2a/B2b*+GPS L1/L2C/L2P(Y)/L5+GLONASS
L1/L2+Galileo E1/E5a/E5b
LNA power supply
+4.75 ~ +5.10 VDC, 0 ~ 100 mA
7.4 External Clock Input
Index
Description
External Clock Input
Frequency: 10 MHz
Voltage Peak: 1.2V~1.8V
Frequency Stability: max ±0.5 ppm
Waveform: Sine
7.5 Serial Port Access
Index
Description
Baud Rate
115200bps by default
Note: When configuring the serial port, make sure that the baud rate matches the data
amount and confirm that the baud rate set by your hardware device is supported. Otherwise,
an error may occur.