unicorecomm UB4B0M All Frequency Compact High Precision Board User Manual

UB4B0M All Frequency Compact High Precision Board

INSTALLATION AND OPERATION

USER MANUAL

WWW.UNICORECOMM.COM

UB4B0M

GPS/BDS/GLONASS/Galileo All-constellation All-frequency Compact High

Precision Board

Copyright© 2009-2021, Unicore Communications, Inc.
Data subject to change without notice.

Revision History

Disclaimer

This manual provides information about the products of Unicore Communications, Inc. This document does not transfer the patent, trademark, copyright of the company or any third party, or any right or permission under it by implication,  estoppel or otherwise.

Except as stated in the sales terms and conditions of the products, the company shall  not assume any other responsibilities. Furthermore, Unicore Communications, Inc.  makes no warranty, express or implied, for the sale and/or use of its products,  including the suitability of a particular purpose and marketability of products, or  liability for infringement of any patent, copyright or other intellectual property rights.  If the connection or operation is not in accordance with the manual, the company is  not liable.

Unicore Communications, Inc. may make changes to product  specifications and product descriptions at any time without prior notice.

The company’s products may contain certain design defects or errors, which will be included in the corrigendum once found, and may therefore result in differences  between the products’ actual specifications and the published ones. Updated  corrigendum is available upon request.

Before placing an order, please contact our company or local distributors for the  latest specifications.

• Unicore Communications, Unicorecomm, NebulasII and its logo have been applied for trademark registration by Unicore Communications, Inc.  Other names and brands are the property of their respective owners. © Copyright 2009-2021 Unicore Communications, Inc. All rights reserved.

Foreword

The User Manual offers you information in hardware features, installation and use,  and performance indicators of UNICORECOMM UB4B0M.

Note: This manual is a generic version. Please refer to the corresponding chapter of the manual  according to the configuration of the purchased product for more information concerning the  usage requirement of CORS, RTK and Heading.

Target Readers

The User Manual is targeted for the technicians with certain knowledge about GNSS  Receiver but not for the general readers.

1. Overview

UB4B0M is a new generation compact RTK board based on NebulasII high performance  and high accuracy GNSS SoC. It supports signals including BDS B1I/B2I/B3I/B1C/B2a,  GPS L1/L2/L5, GLONASS L1/L2 and Galileo E1/E5a/E5b. UB4B0M features classic small  size, supports chip-level multi-path mitigation, and delivers millimeter-level carrier phase  observations and centimeter-level RTK positioning. UB4B0M is particularly suitable for surveying and mapping, high-precision positioning and navigation application.

UB4B0M adopts UNICORECOMM’s new generation all-system multi-core high- precision SoC – NebulasII. The chip is based on the mature core technology of Nebulas baseband  chip, supports 432 channels, and integrates a 600MHz ARM processor and a special  high-speed floating-point processor, yielding stronger satellite navigation signal process  ability. Making full use of the high-performance data sharing ability and the super  simplified real-time operation system, UB4B0M optimizes the multi-dimensional RTK  matrix pipeline computing, which considerably enhances the RTK process ability and  realizes the multi-system multi-frequency RTK calculating (more than 32 satellites).

The newly designed tri-band RTK engine of UB4B0M can process observation data from multiple frequencies of BDS, GPS, GLONASS and Galileo, which can significantly improve the RTK initialization speed, measurement accuracy and reliability in harsh signal environment like urban areas and shade of trees, and realize long-baseline centimeter-level RTK positioning.

Figure 1-1 UB4B0M All-constellation All-frequency Compact High Precision Board

UB4B0M User Manual

1.1 Key Features

• Supporting BDS B1I/B2I/B3I/B1C/B2a, GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5a/E5b, etc.
• Millimeter-level carrier-phase observation data
• Centimeter-level high-precision RTK positioning
• Hardware size compatible with the mainstream GNSS OEM boards on the  market
• Nebulas II-based new generation multi-system multi-frequency high-performance  SoC
• Supporting single-system independent positioning and multi-system integrated  positioning as well as BDS/GPS/GLONASS/Galileo independent PVT output
• Supporting advanced multi-path mitigation
• Supporting 3 serial ports and 1 1PPS

1.2 Technical Index

Table 1-1: Performance

Channels

|

432 channels, based on

NebulasII

|

Cold Start

|

< 25 s

---|---|---|---

Frequency

|

BDS B1I/B2I/B3I/B1C/B2a GPS L1/L2/L5

GLONASS L1/L2

Galileo E1/E5a/E5b

QZSS L1/L2/L5

|

Re-acquisition

|

< 1 s

Single Point

Positioning (RMS)

|

Horizontal: 1.5 m

Vertical: 2.5 m

|

RTK Initialization Time

|

< 5 s (Typical)

Initialization Reliability

|

99.9%

DGPS (RMS)

|

Horizontal: 0.4 m

Vertical: 0.8 m

|

Differential Data

|

RTCM

3.0/3.2/3.3

RTK (RMS)

|

Horizontal: 1 cm + 1 ppm

Vertical: 1.5 cm+1 ppm

|

Data Format

|

NMEA-0183

Unicore

Observation

Accuracy (RMS)

|

BDS GPS GLONASS Galileo

|

Data Update Rate

|

20 Hz

Positioning Update Rate

|

20 Hz

B1/L1 C/A/E1 Code

|

10 cm 10 cm 10 cm 10 cm

|

Time Accuracy (RMS)

|

20 ns

B1/L1/E1 Carrier

Phase

|

1mm 1 mm 1 mm 1 mm

|

Velocity Accuracy (RMS)

|

0.03 m/s

2

B2/L2P(Y)/L2C/E5b Code

|

10 cm 10 cm 10 cm 10 cm

|

Power Consumption

|

1.8W (Typical)

---|---|---|---

B2/L2P(Y)/L2C/E5b Carrier Phase

|

1 mm 1 mm 1 mm 1 mm

|

|

B3/L5/E5a Code

|

10 cm 10 cm 10 cm

|

|

B3/L5/E5a Carrier  Phase

|

1 mm 1 mm 1 mm

|

|

Note: The part marked with * is optional

1.3 Board Overview

Figure 1-2 UB4B0M Structure Diagram

1. RF Part

The receiver gets filtered and enhanced GNSS signal from the antenna via a coaxial cable.  The RF part converts RF input signal into IF signal, and converts IF analog signal into  digital signal which NebulasII (UC4C0) digital processing requires.

2. NebulasII SoC (UC4C0)

The UB4B0M incorporates the processing from the NebulasII SoC—UNICORECOMM’s new generation high precision GNSS SoC with 55 nm low power design, which supports  432 channels and is equipped with a built-in UNICORECOMM’s new generation  baseband engine. The chip integrates a 600 MHz ARM processor and a special  high-speed floating-point processor as well as a special anti- interference unit. A single  NebulasII SoC can complete high-precision baseband processing and RTK positioning  and heading calculation.

3. 1PPS

UB4B0M provides 1 PPS signal with adjustable pulse width and polarity.

4. Event

UB4B0M provides 1 Event Mark Input signal with adjustable pulse width and polarity.

2. Hardware Composition

2.1 Mechanical Dimension

Table 2-1 Mechanical Dimension

Parameter Value (mm) Tolerance

Length

|

71.1

|

-0.2 mm, +0.5 mm

Width

|

45.7

|

±0.2 mm

Height (PCB）

|

1.6

|

±10%

RF Connector

|

6.00

|

±0.2 mm

Shield

|

1.9

|

±0.2 mm

Pin Distance

|

5.6

|

±0.2 mm

Figure 2-1 Mechanical Structure Drawing

2.2 Interface and Pin Definition

Apart from the antenna RF interface, UB4B0M provides the following 20 Pin SAMTEC  dual-row pins. The pin distance: 2.0 mm; pin length: 4.0 mm; base thickness: 1.5 mm.

Figure 2-2 Pinout

2.3 Pin Function

Table 2-2 Pin Definition

No Signal Type Description Note

1

|

RSV

|

|

Reserved

|

Reserved

2

|

3.3V

|

PWR

|

Power input

|

3.3 V~5 V（+5%/-3%）

3

|

Reserved

|

|

Reserved

|

Reserved

4

|

RXD3

|

I

|

COM3 Receive data

|

LVTTL Level

5

|

RESETIN

|

I

|

Reset-input

|

Low level effective,

duration >5 ms

6

|

Reserved

|

O

|

Reserved

|

Reserved

7

|

EVENT

|

I

|

Event input

|

8

|

RSV

|

|

Reserved

|

Reserved

9

|

TXD3

|

O

|

COM3 Send data

|

LVTTL Level

10

|

GND

|

PWR

|

DGND&GND

|

11

|

TXD1

|

O

|

COM1 Send data

|

LVTTL Level

12

|

RXD1

|

I

|

COM1 Receive data

|

LVTTL Level

13

|

GND

|

PWR

|

DGND&GND

|

14

|

TXD2

|

O

|

COM2 Send data

|

LVTTL Level

15

|

RXD2

|

I

|

COM2 Receive data

|

LVTTL Level

16

|

GND

|

PWR

|

DGND&GND

|

17

|

PV

|

O

|

Position validity

indication

|

High level effective

If LED indicators are needed,  please connect this pin to the  positive pole of the LED diode.

18

|

GND

|

PWR

|

DGND&GND

|

19

|

PPS

|

O

|

Time mark output

|

LVTTL Level

20

|

RSV

|

|

Reserved

|

Reserved

2.4 Electrical Specification

Table 2-3 Absolute Maximum Rating

Parameter Symbol Minimum Maximum Unit

VCC

|

Vcc

|

-0.3

|

5.5

|

V

Input Pin Voltage

|

Vin

|

-0.3

|

3.6

|

V

VCC Maximum Ripple

|

Vrpp

|

0

|

50

|

mV

Input Pin Voltage (all the other pins in  addition to the mentioned ones)

|

Vin

|

-0.3

|

3.6

|

V

RF Input Power Consumption of  Antenna

|

ANT_IN input  power

|

|

+15

|

dBm

Maximum Bearable ESD Stress Level

|

VESD (HBM)

|

|

±2000

|

V

2.5 Operational Conditions

Table 2-4 Operational Conditions

Parameter Symbol Minimum Typical Maximum Unit Condition

VCC

|

Vcc

|

3.2

|

3.3

|

5.0

|

V

|

Power-on Impulse  Current*

|

Iccp

|

|

|

10

|

A

|

Vcc=3.3 V

Input Pin Low Level

|

Vin_low_1

|

-0.3

|

|

0.9

|

V

|

Input Pin High Level

|

Vin_high_1

|

2.4

|

|

3.6

|

V

|

Output Pin Low Level

|

Vout_low

|

0

|

|

0.45

|

V

|

Iout=4 mA

Output Pin High Level

|

Vout_high

|

2.85

|

|

3.3

|

V

|

Iout=4 mA

Optimum Input Gain

|

Gant

|

20

|

|

36

|

dB

|

Power Consumption

|

P

|

|

1.8

|

1.9

|

W

|

Note: Since the product has capacitors inside, inrush current will occur during power-on.  Evaluate in the actual environment in order to check the effect of the supply voltage drop due to  the inrush current.

2.6 Physical Characteristics

Table 2-5 Physical Characteristics

Size

|

46 ×71 ×13 mm

---|---

Weight

|

28 g

Temperature

|

Operating Temperature: -40℃～+85℃

Storage Temperature: -55℃～+95℃

Humidity

|

95% non-condensation

I/O Interface

|

2×10 Pin

Antenna Interface

|

1×MCX

Vibration

|

GJB150.16-2009, MIL-STD-810

Shock

|

GJB150.18-2009, MIL-STD-810

3. Hardware Integration Guide3.1 Design Notes

For the normal operation of UB4B0M, 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 to be within 5% VCC

• Use VCC pin to provide reliable power source and earth all GND pin of the board

• MMCX interface provides 4.6±0.2 V feed, and notice 50Ω impedance matching  for the circuit. When no antenna is connected to the port of antenna in the  module, which means there is no load, use a multimeter to test and the voltage  supply is DC 4.8 V ~ 5.4 V. When the RF port of the module is connected with the  antenna and the working current is 30~100 mA at normal temperature, the  antenna feed is DC 4.6 V ± 0.2 V.

• Make sure the output of serial port 1. Users need to use this serial port to receive  the positioning data and to update the software In order to acquire satisfactory performance, the following points should also be  particularly noticed:

• Power supply: Satisfactory performance cannot be achieved without a stable and  low-ripple power source. The peak value of the ripple voltage should not exceed  50mVpp. In addition to adopting LDO to guarantee uninterruptible power supply,  the following points should also be taken into consideration:
  ‒ Widen power supply wires or use split copper pour surface to transmit current
  ‒ Try to place LDO close to the board
  ‒ Power supply wires should not pass through any high power and high inductance devices such as magnetic coils

• UART interface ensures that the corresponding signal and baud rate of the main  device are consistent with those of UB4B0M.

• Antenna wires should be as short and smooth as possible; avoid sharp angle  and pay attention to impedance matching.

• Avoid wiring right beneath UB4B0M.

• Keep the board away as far as possible from any high temperature airflow.

3.2 Notes for Pin

Table 3-1 Notes for Pin

Pin I/O Description Note

Power Supply

|

VCC

|

Power source

|

Power supply

|

Stable, uninterruptible, and low-ripple  power; the peak value of ripple voltage  should not exceed 50mVpp.

MCX

|

Power source

|

Antenna power supply

|

Active antennas supply power at a  corresponding voltage. When no antenna  is connected to the port of antenna in the  module, which means there is no load, use a multimeter to test and the voltage  supply is DC4.8 V ~ 5.4 V. When the RF  port of the module is connected with the  antenna and the working current is  30~100 mA at normal temperature, the  antenna feed is DC4.6 V ± 0.2 V.

GND

|

Power source

|

Ground

|

Ground all GND signals of the board,  preferably with a larger area of copper pour.

UART

|

TXD1

|

O

|

Send from

Serial Port 1

|

Output by Serial Port 1; leave vacant if  not necessary.

RXD1

|

I

|

Receive by Serial Port 1

|

Input by Serial Port 1; leave vacant if not  necessary.

TXD2

|

O

|

Send from Serial Port 2

|

Output by Serial Port 2; leave vacant if  not necessary.

RXD2

|

I

|

Receive by Serial Port 2

|

Input by Serial Port 2; leave vacant if not  necessary.

TXD3

|

O

|

Send from

Serial Port 3

|

Output by Serial Port 3; leave vacant if  not necessary.

RXD3

|

I

|

Receive by

Serial Port 3

|

Input by Serial Port 3; leave vacant if not  necessary.

3.3 Antenna

Antenna input MCX interface of UB4B0M provides an antenna feed of 4.6±0.2 V. When  no antenna is connected to the port of antenna in the module, which means there is no  load, use a multimeter to test and the voltage supply is DC4.8 V ~ 5.4 V. When the RF port  of the module is connected with the antenna and the working current is 30~100 mA at  normal temperature, the antenna feed is DC4.6 V ± 0.2 V. When adopting active antennas,  pay attention to the 50Ω impedance matching for the antennas.

UB4B0M User Manual

Figure 3-1 UB4B0M Antenna Connection Diagram

4. Connection and Setting

4.1 Electrostatic Protection

Many components on UB4B0M are vulnerable to electrostatic damage, which will then affect IC circuits and other components. Please take the following electrostatic protection measures before opening the anti-static blister box:

• Electrostatic discharge (ESD) may damage components. Please operate the  board on the anti-static work table and at the same time wear an anti-static  wristband and use conductive foam pads. If no anti-static bench is available,  please wear an anti-static wristband and connect it to the metal part of the  machine for anti-static protection.
• When plugging or unplugging the board, please do not touch the components on  the board directly.

After taking out the board, please check the components carefully for obvious loose  or damage.

4.2 Installation Guide

UB4B0M is delivered in the form of board, allowing users to assemble it flexibly according  to application scenarios and market needs. The following figure shows a typical UB4B0M  installation method using a set of evaluation kit (EVK). Users can also, in the same way,  use other receiver casings to install.

Figure 4-1 UB4B0M Installation Diagram

To ensure efficient installation, please prepare the following tools before installing the  board:

● UB4B0M board and EVK

● User manual

● Command manual

● UPrecise display and control software

● Qualified antennas

● MCX antennas and connecting cables

● Desktop or laptop (Win7 and above) with serial ports, installed relevant serial  driver and UPrecise software

Step 1. For the UB4B0M EVK users, align UB4B0M positioning holes and pins with EVK.

Note: If the EVK connector hole is 24-pin, connect the middle 24 pins of the board with the  connector). EVK provides power supply and standard communication interface to the board to  communicate with peripheral devices (such as PC, CAN and USB devices, etc.)

Step 2. Select a GNSS antenna with appropriate gain, and set it in a stable and open area.  Connect the antenna with the board through coaxial radio frequency cable. When  the antenna is installed, the MCX antenna interface on UB4B0M corresponds to  the antenna signal interface.

Figure 4-2 UB4B0M Connecting to Antenna RF Wires

Note: The RF connector on the board is MMCX; please select the appropriate cable according to  the packaging. The input signal gain of the antenna connector should be within 25 to 36dB. Plug  and unplug the MCX RF head vertically and the time of this operation is limited. Improper  plugging or unplugging will lead to damage to the RF head or MCX male connector head.

Step 3. Connect the PC to EVK through serial ports.

Step 4. Connect a 12V adapter to the EVK power source, and switch on to power  UB4B0M.

Figure 4-3 UB4B0M Power on EVK

Step 5. Start the UPRECISE control software on PC and connect to the receiver through  the software.

Step 6. Operate the receiver via UPRECISE and record the relevant data.

4.3 Power on

The supply voltage of UB4B0M is 3.3 V, and the supply terminal voltage of EVK is 12 V.  After powered on, the receiver starts up and can quickly establish communication.

4.4 Setting and Output

The satellite display and control software UPRECISE provides a graphical interface so  that users can set up the receiver conveniently and be aware of the receiver status and  required information rapidly.

UPrecise possesses the following basic functions:

• Connecting the receiver and configuring the baud rate, etc.
• Displaying the preliminary position of satellite, PRN, and Signal/Noise Ratio in  the graphical window (Constellation View)
• The trajectory window displaying the present and historical points, as well as the position velocity and time (Trajectory View)
• Graphic interface for data logging and sending commands to the receiver (Logging Control View)
• Console window for sending commands to the receiver (Console View)
• Sending commands to the receiver
• Displaying the track point
• Upgrading the firmware
• TTFF test

Figure 4-4 UPrecise Interface

4.4.1 Operation Steps

Step 1. Follow 4.2 Installation Guide to connect the power source, antenna to the board,  and turn on the EVK switch

Step 2. Click file – > connect the serial port, and set the baud rate; the default baud rate of UB4B0M is 115200bps

Figure 4-5 Connect the Serial Port

Step 3. Click the receiver settings button to configure the NMEA message output. It is recommended to configure GPGGA, GPGSV, and other messages.

Figure 4-6 NMEA Data Output

Step 4. Click the receiver settings button, configure the NMEA message output, and click send. It is recommended to configure GPGGA, GPGSV, and other messages.

Step 5. In the data session window, click “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, etc.

Step 6. Use various views of UPrecise to configure or input commands as required.

5. LED Indicators

Three LED indicators are installed on UB4B0M board to indicate the basic working status  of the board, which includes:

No Color Status Instruction Remark

1

|

Red

|

On

|

Power on

|

2

|

Off

|

Power off

|

3

|

Green

|

On

|

PV indicator, RTK FIX is enabled

|

4

|

Off

|

PV indicator, RTK FIX is disabled

|

5

|

Yellow

|

On

|

Single point positioning is enabled

|

6

|

Off

|

Single point positioning is disabled

|

15

UB4B0M User Manual

6. Common Commands Setup

UB4B0M supports simplified ASCII format. Simplified ASCII format without checksum bits  makes it easier for users to enter commands. All commands consist of a command header  and configuration parameters (if the parameter part is empty, the command has only one  header), and the header field contains the command name or message header.

UB4B0M is simple and easy to use, and the common commands are shown in the following table:

Table 6-1 Common Commands

Command Description

freset

|

Restore factory settings

version

|

Query version number

config

|

Query the serial port status of receiver

mask BDS

|

Mask (disable) tracking of Beidou satellite system. BDS, GPS, GLONASS and Galileo can be disabled separately.

unmask BDS

|

Unmask (enable) tracking of Beidou satellite system. BDS, GPS, GLONASS and Galileo can be enabled separately.  By default, all satellite systems are tracked.

config com1 115200

|

Set com1 baud rate as 115200

Com1, com2 and com3 can be set respectively as any one of  9600, 19200, 38400, 57600, 115200, 230400, and 460800

unlog

|

Disable all output of the current serial port

saveconfig

|

Save settings

mode base time 60 1.5 2.5

|

The reference point coordinates are automatically generated 60  seconds after positioning or when the horizontal accuracy is  better than 1.5m or the elevation accuracy is better than 2.5 m. After power off and restart, the new reference point coordinates  will be calculated and generated again.

mode base lat Lon height

|

Manually set the reference point coordinates as: lat, lon, height  (the coordinates do not change after the power off and restart)  e.g.

lat=40.07898324818,

lon=116.23660197714,

height=60.4265

Note: The longitude and latitude coordinates can be obtained through the bestpos command. If it is the southern latitude, lat  value is negative; if it is the western longitude, lon value is  negative.

mode base

|

Set as base station

mode movingbase

|

Set as moving base station

mode rover

|

Rover mode by default (The command can switch the receiver  from the base station mode to rover station mode)

Command Description

rtcm1033 comx 10

rtcm1006 comx 10

rtcm1074 comx 1

rtcm1124 comx 1

rtcm1084 comx 1

rtcm1094 comx 1

|

The base station mode is set as COMX, ICOMX, NCOMX to  send a differential message. COMX can be appointed as  anyone of COM1, COM2, and COM3;

NMEA0183 Output Statement

gpgga comx 1

|

Set the output frequency of GGA message as 1 Hz Message type and update rate can be set flexibly: 1, 0.5, 0.2  and 0.1 correspond to output frequency 1Hz, 2Hz, 5Hz and  10Hz respectively; different types include GGA, RMC, ZDA,  VTG, NTR

gphdt comx 1

|

Output the course information of current time HDT Course types include: HDT, TRA

6.1 Base Station Setting

RTK base station (fixed base station) is to install the receiver antenna at a fixed position and it will not move during the whole process. At the same time, the precise coordinates of the known measuring station and the received satellite information are directly or after being processed sent to the receiver of the rover station (pending position) in real time. The rover station receives the satellite observations as well as information from the base station to conduct the RTK positioning calculation and realize centimeter-level or  millimeter-level positioning.

Table 6-2 Base Station Mode shows the commands entered the receiver when precise coordinates are known.

Table 6-2 Base Station Mode

No Command Specification

1

|

mode base 40.078983248 116.23660197760.42

|

Set as base station, longitude,  latitude, and elevation

2

|

rtcm1006 com2 10

|

RTK base station antenna

reference point coordinates

(including antenna height)

3

|

rtcm1033 com2 10

|

Receiver and antenna

specification

4

|

rtcm1074 com2 1

|

GPS differential message

5

|

rtcm1124 com2 1

|

BDS differential message

6

|

rtcm1084 com2 1

|

GLO differential message

7

|

rtcm1094 com2 1

|

Galileo differential message

No Command Specification

8

|

saveconfig

|

Save settings

Self-optimizing setting base station refers that there is no precise coordinate at the point  where the base station is set up. The receiver can be set to self-position within a certain  period at the installation point to get the average value, which can be set as the  coordinates of the base station. Commands are shown in Table 6-3: Self-optimizing Setting  Base Station.

Table 6-3: Self-optimizing Setting Base Station

No Command Specification

1

|

mode base time 60 1.5 2.5

|

The receiver conducts independent positioning for  60s, or when the standard deviation of horizontal  positioning <=1.5m and the standard deviation of elevation positioning <=2.5m, the average value of  horizontal positioning and the average value of  elevation positioning are taken as the coordinate  value of the base station.

2

|

rtcm1006 com2 10

|

RTK base station antenna reference point  coordinates (including antenna height)

3

|

rtcm1033 com2 10

|

Receiver and antenna specification

4

|

rtcm1074 com2 1

|

GPS differential message

5

|

rtcm1124 com2 1

|

BDS differential message

6

|

rtcm1084 com2 1

|

GLO differential message

7

|

rtcm1094 com2 1

|

Galileo differential message

8

|

saveconfig

|

Save settings

6.2 Rover Station Setting

RTK rover station (mobile station) receives the differential correction information of the  base station in real time, and at the same time, it receives the satellite signal for RTK  positioning calculation, realizing RTK high-precision positioning. The receiver can  adaptively identify the ports and formats of RTCM data input. Common commands of the  RTK rover station are:

MODE ROVER

GNGGA 1

SAVECONFIG

6.3 Mobile Base Station Setting

The mobile base station is different from the RTK base station, which is a fixed station with  known and precise coordinates. The mobile base station is in a state of motion, and at the  same time, the received satellite information is directly or after being processed sent to the receiver (pending point) of the rover station in real time. The receiver receives the satellite observation value and the information of the mobile base station for relative positioning to determine the location of the rover station relative to the mobile base station. Common commands for configuring mobile base stations are shown in Table 6-4: Mobile  Base Station Mode.

Table 6-4 Mobile Base Station Mode

No Command Specification

1

|

mode moving base

|

Set as mobile base station

2

|

rtcm1006 com2 1

|

Mobile base station antenna reference point  coordinates (including antenna height)

3

|

rtcm1033 com2 1

|

Receiver and antenna specification

4

|

rtcm1074 com2 1

|

GPS differential message

5

|

rtcm1124 com2 1

|

BDS differential message

6

|

rtcm1084 com2 1

|

GLO differential message

7

|

rtcm1094 com2 1

|

Galileo differential message

8

|

saveconfig

|

Save settings

7. Firmware Update

The firmware of UB4B0M is updated using UPrecise software. In the UPrecise interface,  click as follows: “Advanced” -> “Firmware Update”.

Figure 7-1 Update Interface

Click “Select Path”, select the file location of UB4B0M PKG and then click “START”  (Ignore the software reset option).

UB4B0M User Manual

Figure 7-2 Update Steps

Wait for the progress bar to complete 100%, and the upgrade time will be counted (usually  less than 5 minutes).

Figure 7-3 Update Steps

When using a serial port to upgrade, please use serial port 1 of the board.

8. Packaging

UB4B0M boards are packed in cartons, 100 UB4B0M boards per carton.

Table 8-1 Packaging

Project Description

1

|

10 boxes per carton

2

|

10 anti-static packages per box

3

|

1 UB4B0M per package

21

Unicore Communications, Inc.

No.7, Fengxian East Road, Haidian, Beijing, P.R.China, 100094

www.unicorecomm.com 

Phone: 86-10-69939800

Fax: 86-10-69939888

info@unicorecomm.com

www.unicorecomm.com

References

• 和芯星通北斗导航芯片-北斗导航模块北斗高精度定位板卡国内外领先的芯片、OEM板卡和产品解决方案提供商

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