HOW DOES IT WORK?

LBAND RTK Click is based on the NEO-D9S-00B, a satellite data receiver for L-band correction broadcast from u-blox, which can be configured for use with various correction services. Operating in a frequency range from 1525MHz to 1559MHz, the NEO-D9S-00B decodes the satellite transmission and outputs a correction stream, enabling a high-precision GNSS receiver to reach accuracies down to centimeter level. An independent stream of correction data, delivered over satellite L-band, ensures high availability of position output. Simultaneously, it reduces dependence on a cellular connection for the correction service provided over IP. Besides, it implements advanced security features such as signature and anti-jamming mechanisms.

In addition to accessing the broadcast data stream, the NEO-D9S-00B also eliminates the need for a dedicated delivery channel per user, making it flexible for different markets and applications. It is configurable for use with correction data of various providers and service levels, ensuring precision in multiple regions globally, as well as coverage across continents. This Click board™ can be easily integrated with other GNSS receivers from the u-blox F9 platform, such as GNSS RTK Click boards™ from our offer, providing a complete solution built with less design effort.

LBAND RTK Click communicates with the host MCU using the UART interface at 115200bps as its default communication protocol but also has other interfaces, such as SPI and I2C. The interface is selected by positioning SMD jumpers labeled COMM SEL in an appropriate position. When choosing the SPI communication, with the correct selection of the COMM SEL jumpers, it is also necessary to populate the DSEL jumper to configure the interface pins as SPI. In the default state, the jumper labeled as DSEL is unpopulated. In the case of using only this Click board™ alone via the I2C interface, it is necessary to populate I2C pull-up resistors (R2 and R3). Remove these resistors when using LBAND RTK in combination with other GNSS RTK boards. An additional header holds an optional UART interface, which can provide correction data directly to a GNSS receiver.

The USB interface, compatible with USB version 2.0 (Full Speed, 12 Mbit/s), can be used for communication as an alternative to the UART. Also, the USB port can be used as an additional power supply if you need the Click board™ to be a standalone device. In this case, the main module supply is provided by an onboard regulator, the NCV8705, providing the necessary 3.3V for its proper operation. The receiver also can enter a Safe-Boot mode. When the jumper labeled SFBT is populated, the receiver starts in Safe-Boot mode, and the L-band operation is disabled. During Safe-Boot mode, only the main UART interface is possible.

In addition to these features, this board also uses several mikroBUS™ pins. EIN pin routed to the AN pin of the mikroBUS™ socket is used as an external interrupt feature activated through a population of the R6 0Ω resistor. The RST pin routed on the PWM pin of the mikroBUS™ socket provides the general reset ability.

LBAND RTK Click possesses the SMA antenna connector for connecting the appropriate antenna that Mikroe offers, such as GNSS L-Band Active Antenna. This antenna easily allows positioning in space, supporting GNSS L-Band frequencies. This Click board™ can be operated only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.

SPECIFICATIONS