unicore UM960L Multi Frequency High Precision RTK Positioning Module User Manual

unicore UM960L Multi Frequency High Precision RTK Positioning Module

M960L User Manual

Product Information

The UM960L is a GPS/BDS/GLONASS/Galileo/QZSS all-constellation multi-frequency high precision RTK positioning module. It is based on the new generation GNSS SoC – Nebulas IVTM, with RF-baseband and high+ QZSS L1/L2/L5 all constellations and multiple frequencies RTK engine, and advanced RTK processing technology. It features independent track of each frequency and 60 dB narrowband anti-jamming.

Key Features

• High precision

• Compact size

• Low power consumption

• Based on the new generation GNSS SoC – Nebulas IVTM

• RF-baseband and high+ QZSS L1/L2/L5 all constellations and
  multiple frequencies RTK engine

• Advanced RTK processing technology

• Independent track of each frequency

• 60 dB narrowband anti-jamming

Key Specifications

L1C/A, L2C/A; Galileo: E1, E5b, E5a; QZSS: L1, L2, L5
Power Voltage| +3.0 V~ +3.6 V DC
Power Consumption| 440 mW Typical
Positioning Accuracy (RMS)| Single Point Positioning: Horizontal- 1.5 m, Vertical- 2.5 m;
DGPS: Horizontal- 0.4 m, Vertical- 0.8 m; RTK: Horizontal- 0.8 cm +
1 ppm, Vertical- 1.5 cm + 1 ppm

Product Usage Instructions

The UM960L is a high precision RTK positioning module meant for use by technicians who possess expertise on GNSS receivers. The following instructions are provided for installation and operation:

Installation

The UM960L must be installed in accordance with the guidelines provided in the hardware design section of the user manual. Install the module in a location that provides clear line of sight to the GPS, BDS, GLONASS, Galileo and QZSS constellations. Connect the module to the system using the interfaces provided.

Operation

The UM960L module can be powered on and off using the power-on and power-off buttons provided in the interfaces section of the user manual. The module is capable of high precision positioning with single point positioning (RMS) accuracy. The observation accuracy RMS can be obtained using B1I/L1C/A/G1/E1 pseud orange and B1I/L1C/A/G1/E1 carrier phase.

Production Requirement

The production requirements for the UM960L are described in detail in the production requirement section of the user manual.
Please follow these requirements to ensure the proper functioning of the module.

Packaging

The UM960L is packaged in accordance with the product packaging guidelines provided in the user manual.
Please follow the instructions carefully while unpacking and installing the module.

Revision History

Legal Right Notice
This manual provides information and details on the products of Unicode Communication, Inc. (“Unicode”) referred to herein.

All rights, title and interest to this document and the information such as data, designs, layouts contained in this manual are fully reserved, including but not limited to the copyrights, patents, trademarks and other proprietary rights as relevant governing laws may grant, and such rights may evolve and be approved, registered or granted from the whole information aforesaid or any part(s) of it or any combination of those parts.

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Disclaimer
The information contained in this manual is provided “as is” and is believed to be true and correct at the time of its publication or revision. This manual does not represent, and in any case, shall not be construed as a commitments or warranty on the part of Unicode with respect to the fitness for a particular purpose/use, the accuracy, reliability and correctness of the information contained herein.

Information, such as product specifications, descriptions, features and user guide in this manual, are subject to change by Unicode at any time without prior notice, which may not be completely consistent with such information of the specific product you purchase.

Should you purchase our product and encounter any inconsistency, please contact us or our local authorized distributor for the most up-to-date version of this manual along with any addenda or corrigenda.

Foreword
This document describes the information of the hardware, package, specification and the use of Unicode UM960L modules.

Target Readers
This document applies to technicians who possess the expertise on GNSS receivers.

Introduction

UM960L is a new generation of GNSS high precision positioning RTK module from Unicode. It supports all constellations and multiple frequencies, and can simultaneously track GPS L1/L2/L5 + BDS B1I/B2I/B3I + GLONASS L1/L2+Galileo E1/E5a/E5b + QZSS L1/L2/L5. The module is mainly used in geological hazard monitoring, deformation monitoring, and high precision GIS.

UM960L is based on Nebulas ⅣTM, a GNSS SoC which integrates RF-baseband and high precision algorithms. Besides, the SoC integrates a 2 GHz dual CPU, a high speed floating point processor and a RTK co-processor with 22 nm low power design, and it supports 1408 super channels. All these above enable stronger signal processing.

UM960L features a compact size of 16.0 mm × 12.2 mm. It adopts SMT pads, supports standard pick-and-place, and supports fully automated integration of reflow soldering.

Furthermore, UM960L supports interfaces such as UART, I2C, which meets the customers’ needs in different applications.

• Reserved interface, not supported currently.

Features

• High precision, compact size and low power consumption
• Based on the new generation GNSS SoC -Nebulas IVTM, with RF-baseband and high precision algorithms integrated
• 16.0 mm × 12.2 mm × 2.4 mm, surface-mount device
• Supports all-constellation multi-frequency on-chip RTK positioning solution
• Supports GPS L1/L2/L5 + BDS B1I/B2I/B3I + GLONASS L1/L2 + Galileo E1/E5b/E5a + QZSS L1/L2/L5
• All constellations and multiple frequencies RTK engine, and advanced RTK processing technology
• Independent track of each frequency, and 60 dB narrowband anti-jamming

Specifications

Table 1-1 Technical Specifications

Basic Information| | | |
---|---|---|---|---
Channels| 1408 channels, based on Nebulas IVTM|
Constellations| GPS/BDS/GLONASS/Galileo/QZSS|
Frequency| GPS: L1C/A, L2P(W), L2C, L5 BDS: B1I, B2I, B3I
GLONASS: L1C/A, L2C/A
Galileo: E1, E5b, E5a QZSS: L1, L2, L5|
Power| | | |
Voltage| +3.0 V to +3.6 V DC| |
Power Consumption| 410 mW （Typical）| |
Performance| | | |
| Single Point Positioning (RMS)| Horizontal: 1.5 m|
Vertical: 2.5 m|
Positioning Accuracy|

DGPS (RMS)

| | Horizontal: 0.4 m|
| Vertical: 0.8 m|
| RTK (RMS)| | Horizontal: 0.8 cm + 1 ppm
| Vertical: 1.5 cm + 1 ppm
Observation Accuracy（RMS）| BDS| GPS| GLONASS| Galileo
B1I/ L1C/A /G1/E1 Pseud orange| 10 cm| 10 cm| 10 cm| 10 cm
B1I/ L1C/A /G1/E1 Carrier Phase| 1 mm| 1 mm| 1 mm| 1 mm
B2I/L2P/G2/E5b Pseud orange| 10 cm| 10 cm| 10 cm| 10 cm
---|---|---|---|---
B2I/L2P/G2/E5b Carrier Phase| 1 mm| 1 mm| 1 mm| 1 mm
Time Accuracy (RMS)| 20 ns|
Velocity Accuracy (RMS)| 0.03 m/s|
Time to First Fix (TTFF)| Cold Start < 30 s|
Initialization Time| < 5 s (Typical)|
Initialization Reliability| > 99.9%|
Data Update Rate| 5 Hz Positioning|
Differential Data| RTCM 3.0, 3.2, 3.3|
Data Format| NMEA-0183; Unicode|
Physical Specifications| |
Package| 24 pin LGA|
Dimensions| 16.0 mm × 12.2 mm × 2.4 mm|
Environmental Specifications| |
Operating Temperature| -40 °C to +85 °C|
Storage Temperature| -55 °C to +95 °C|
Humidity| 95% No condensation|
Vibration| GJB150.16A-2009; MIL-STD-810F|
Shock| GJB150.18A-2009; MIL-STD-810F|
Functional Ports| |
UART x 3| |
I2C* x 1| |

Interfaces

• RF Part
  The receiver gets filtered and enhanced GNSS signal from the antenna via a coaxial cable. The RF part converts the RF input signals into the IF signal, and converts IF analog signal into digital signals required for NebulasIVTM chip.

• NebulasIVTM SoC
  NebulasIVTM is UNICORECOMM’s new generation high precision GNSS SoC with 22 nm low power design, supporting all constellations, multiple frequencies and 1408 super channels. It integrates a 2 GHz dual CPU, a high speed floating point processor and an RTK co-processor, which can fulfill the high precision baseband processing and RTK positioning independently.

• 1PPS
  UM960L outputs 1 PPS with adjustable pulse width and polarity.

• Event
  UM960L provides 1 Event Mark Input with adjustable frequency and polarity.

• Reset (RESET_N)
  Active LOW, and the active time should be no less than 5 ms.

Hardware

Dimensions

Table 2-1 Dimensions

Pin Definition

Table 2-2 Pin Definition

or peripheral I/O
2| RSV| —| Reserved, must be floating; cannot connect ground or power supply or peripheral I/O
3| PPS| O| Pulse per second
4| EVENT| I| Event Mark
5| BIF| —| Built-in function; recommended to add a through-hole testing point and a 10 kΩ pull-up resistor; cannot connect ground or power supply or peripheral I/O, but can be floating.
6| TXD2| O| UART2 transmitting data
7| RXD2| I| UART2 receiving data
No.| Pin| I/O| Description
---|---|---|---
8| RESET_N| I| System reset
Active Low
9| VCC_RF1| O| External LNA power supply
10| GND| —| Ground
11| ANT_IN| I| GNSS antenna signal input
12| GND| —| Ground
13| GND| —| Ground
14| RSV| —| Reserved, must be floating; cannot connect ground or power supply or peripheral I/O
15| RXD3| I| UART3 receiving data
16| TXD3| O| UART3 transmitting data
17| BIF| —| Built-in function; recommended to add a through-hole testing point and a 10 kΩ pull-up resistor; cannot connect ground or power supply or peripheral I/O, but can be floating.
18| SDA| I/O| I2C data
19| SCL| I/O| I2C clock
20| TXD1| O| UART1 transmitting data
21| RXD1| I| UART1 receiving data
22| V_BCKP2| I| When the main power supply VCC is cut off, V_BCKP supplies power to RTC and relevant register. Level requirements: 2.0 V ~ 3.6 V, and the working current is less than 60 μA at
25 °C. If you do not use the hot start function, connect V_BCKP to VCC. Do NOT connect it to ground or leave it floating.
23| VCC| I| Supply voltage
24| GND| —| Ground

• Not recommended to take VCC_RF as ANT_BIAS to feed the antenna See section 3.1 for more details.
• Not supported currently, and keep this pin floating.

Electrical Specifications

Absolute Maximum Ratings
Table 2-3 Absolute Maximum Ratings

RF Input Power
Consumption of Antenna| ANT_IN input power| | +10| dBm
External LNA Power Supply| VCC_RF| -0.3| 3.6| V
VCC_RF Output Current| ICC_RF| | 100| mA
Storage Temperature| Tstg| -55| 95| °C

Operational Conditions
Table 2-4 Operational Conditions

IO Threshold
Table 2-5 IO Threshold

Antenna Feature
Table 2-6 Antenna Feature

• Since the product has capacitors inside, inrush current occurs during power-on. You should evaluate in the actual environment in order to check the effect of the supply voltage drop caused by inrush current in the system.

Hardware Design

Antenna Feed Design

UM960L just supports feeding the antennal from the outside of the module rather than the inside. It is recommended to use devices with high power and that can withstand high voltage. Gas discharge tube, varactor, TVS tube and other high-power protective devices may also be used in the power supply circuit to further protect the module from lighting strike and surge.

Remarks:

• L1: feed inductor, 68nH RF inductor in 0603 package is recommended;
• C1: decoupling capacitor, it is recommended to connect two capacitors of 100nF/100pF in parallel;
• C2: DC blocking capacitor, recommended 100pF capacitor;
• Not recommended to take VCC_RF as ANT_BIAS to feed the antenna (VCC_RF is not optimized for the anti-lighting strike and anti-surge due to the compact size of the module)
• D1: ESD diode, choose the ESD protection device that supports high frequency signals (above 2000 MHz)
• D2: TVS diode, choose the TVS diode with appropriate clamping specification according to the requirement of feed voltage and antenna voltage

Grounding and Heat Dissipation

The 55 pads in the rectangle in Figure 3-2 are for grounding and heat dissipation.
In the PCB design, they must connect to a large sized ground to strengthen the heat dissipation.

Power-on and Power-off VCC

• The VCC initial level when power-on is less than 0.4 V and it has good monotonicity. The voltages of undershoot and ringing are within 5% VCC.
• VCC power-on waveform: The time interval from 10% rising to 90% must be within 100 μs to 1 ms.
• Power-on time interval: The time interval between the VCC < 0.4 V (after power-off) to the next power-on must be larger than 500 ms.

V_BCKP

• The V_BCKP initial level when power-on is less than 0.4 V and it has good monotonicity. The voltages of undershoot and ringing are within 5% V_BCKP.
• V_BCKP power-on waveform: The time interval from 10% rising to 90% must be within 100 μs to 1 ms.
• Power-on time interval: The time interval between the V_BCKP < 0.4 V (after power-off) to the next power-on must be larger than 500 ms.

Production Requirement

Recommended soldering temperature curve is as follows:

Temperature Rising Stage

• Rising slope: Max. 3 °C/s
• Rising temperature range: 50 °C to 150 °C

Preheating Stage

• Preheating time: 60 s to 120 s
• Preheating temperature range: 150 °C to 180 °C

Reflux Stage

• Over melting temperature (217 °C) time: 40 s to 60 s
• Peak temperature for soldering: no higher than 245 °C

Cooling Stage

• Cooling slope: Max. 4 °C/s
• In order to prevent falling off during soldering of the module, do not solder it on the back of the board during design, that is, better not go through soldering cycle twice.
• The setting of soldering temperature depends on many factors of the factory, such as board type, solder paste type, solder paste thickness, etc. Please also refer to the relevant IPC standards and indicators of solder paste.
• Since the lead soldering temperature is relatively low, if using this method, please give priority to other components on the board.
• The opening of the stencil needs to meet your design requirement and comply to the examine standards. The thickness of the stencil is recommended to be 0.15 mm.

Packaging

Label Description

Product Packaging

The UM960L module uses carrier tape and reel (suitable for mainstream surface mount devices), packaged in vacuum-sealed aluminum foil antistatic bags, with a desiccant inside to prevent moisture. When using reflow soldering process to solder modules, please strictly comply with IPC standard to conduct humidity control. As packaging materials such as the carrier tape can only withstand the temperature of 55 °C, modules shall be removed from the package during baking.

Table 5-1 Package Description

External diameter: 330 mm Internal diameter: 100 mm Width: 24 mm
Thickness: 2.0 mm
Carrier Tape| Space between (center-to-center distance): 20 mm

The UM960L is rated at MSL level 3. Refer to the relevant IPC/JEDEC J-STD-033 standards for the package and operation requirements.
You may access to the website www.jedec.org to get more information.
The shelf life of the UM960L module packaged in vacuum-sealed aluminum foil antistatic bags is one year.

Unicore Communications, Inc.
F3, 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

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