embit EMB-LR1302-mPCIe LoRaWAN Gateway Module User Manual

EMB-LR1302-mPCIe User Manual
Embit s.r.l.
Rev.1.1
09/12/2021

Document information

Versions & Revisions

the Electrical Characteristics section**
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Introduction

EMB-LR1302-mPCIe provides long-range connectivity using ultra-long range spread spectrum communication and high interference immunity on the 868/915 MHz radio band. This device is characterized by up to 10x less power consumption than previous solutions has a better thermal design and is capable of handling a higher amount of traffic than preceding devices.

EMB-LR1302-mPCIe is designed around the Semtech SX1302 which is a new generation of digital baseband LoRa® chip for gateways. It offers up to 8 LoRa® channels in the 868 MHz (or 915 MHz) frequency allowing it to receive up to 64 LoRa® packets simultaneously. It is able to achieve a sensitivity of up to -140 and an RF output power of +27 dBm making it the ideal device to use in LoRa® gateways applications. It supports two new spreading factors: SF5 and SF6. This enables users to reach higher data rate communication.

Specifications

• Operating Voltage: 5V
• Current Consumption: 421mA (Tx@+27dBm); 39mA (Rx)
• Modulation: LoRa® Spread Spectrum, FSK, GFSK
• Operating Frequency: 868MHz (EU) / 915MHz (US)
• Frequency Range: 860MHz to 1020MHz
• Operating Temperature: -40°C to +85°C
• RF Output Power: Up to +27dBm
• Interfaces: mPCIe Interface
• Sensitivity: Up to -140 dBm
• Dimensions: 30.00×50.95×1.00 mm
• Features: On-board uFL antenna connector, 8 LoRa®Channels

 Description

SX1302 Module

The SX1302 is a new generation of baseband LoRa® chip for gateways. It excels in reducing current consumption, simplifies the thermal design of gateways and it is capable of handling a higher amount of traffic than preceding devices.

Main features:

• RF standard supported: LoRaWAN®
• Frequency band: 868 MHz, 915MHz
• borage is the driver of the SX1302, which provides API for LoRa® packet exchange using the SX1302 (developed by Semtech, customized and ported by Embit® to this specific platform).
• packet_forwarder is the application that allows the exchange of the LoRaWAN® server. It forwards RF packets received by the gateway to a server through an IP/UDP link and emits RF packets that are sent by the server.
• Sample Projects:
  ◦ Semtech source code available SX1302-Hal
  ◦ helper programs: util_pkt_logger, util_spi_stress, util_tx_test, util_tx_continuous

 SX1250 Module

The two SX1250 [2] are a half-duplex sub-1 GHz RF to IQ transceiver designed to work along with Semtech’s SX1302 baseband engine, to design a high performing
LoRaWAN® gateway.

The SX1250 is capable of low power operation in the 150-960 MHz ISM frequency bands. It has a maximum signal bandwidth of 500 kHz both in transmission and reception.

The SX1250 transceiver is controlled by its companion baseband chip SX1302 through an SPI interface.

Crypto Element

The Crypto element is a high-security cryptographic device that combines world-class hardware-based key storage with hardware cryptographic accelerators to implement various authentication and encryption protocols.

The includes an EEPROM array which can be used for storage of up to 16 keys, certificates, miscellaneous read/write, secret data, and security configurations.
Access to the various sections of memory can be restricted in a variety of ways and then the configuration can be locked to prevent changes.

It can be used as an Ecosystem control and Anti-Counterfeiting and validates if a system or component is authentic and came from the OEM shown on the nameplate.

Access to the device is made through a standard I2C Interface at speeds of up to 1 Mb/s.

External Antenna Connection

The EMB-LR1302-mPCIe has a U.FL connector for an 868MHz antenna (or 915MHz for the US market).

Connections

Pin Out Description

Table 1: mPCIe Interface Pin Out.

Electrical Characteristics

Absolute Minimum and Maximum Ratings

Table 2: Absolute minimum and maximum ratings.

Operating Conditions

Table 3: Operating Conditions.

Power Consumption

Table 4: Power Consumption.

RF Characteristics

Table 5: Receiver Sensitivity.

Regulatory Compliance

 Introduction

The purpose of this chapter is to describe which behavior the user MUST have in order to operate the device under compliance with current regulations. The details described here are then to be read carefully and applied literally. Also, please read carefully all the other documentation available in order to understand all the limits and ensure compliance of the final application.

The module EMB-LR1302-mPCIe will be certified for CE, FCC, and IC compliance. The different regulations have different limitations and impose different approaches to the module that will be discussed in different chapters. Any aspect that both the regulations have in common will be described in an appropriate chapter in order to keep the readability of this document at maximum.

The main aspect that the user MUST consider is the output power. The module itself is compliant and ready to be used but care must be taken in setting an appropriate output
power when programming the devices. The module can output up to 27 dBm of conducted power. Please follow the directives in this document to set the appropriate output power for the antenna you are using. Any other antenna that is not covered in the certification must not be used unless a new certification is performed.

Compliance: Important information

The module is to be used in accordance with the current guide. Any hardware modification on the module will void the certification.

The antennas used must be one of those indicated by the manufacturer and the output power must be set as required by the present document.

The EMB-LR1302-mPCIe can operate using the external antenna attached via the U.FL connector. For the specific FCC certification, the list of allowed antennas is indicated in the following table. The use of any other antenna is permitted only with an FCC Class two permissive Change.

NB: in the standard use of the device a minimum distance of 20 cm between the radiant element and the human body has to be maintained.

 FCC: Data

FCC ID: Z7H-EMBLR1302
Brand: Ambit
Model: EMB-LR1302-mPCIe
Power supply: 5V VDC
Transmission frequency: 902-928 MHz

The device complies with part 15 of the FCC Rules. Operation is subjected to the following 2 conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

 FCC: Maximum Output power

The FCC regulation allows for up to 30 dB of output power plus up to 6 dBi of assembly gain which translates into up to +36 dBm of EIRP. The modules EMB- LR1302-mPCIe can output up to +27 dBm and so when using the allowed antenna, will have no problems with the output power limit. Spurious emission and spectral density
doesn’t limit the output power either on the EMB-LR1302-mPCIe and so every output power setting can be used.

FCC: Device labeling

Please notice that if the FCC identification number is not visible when the module is installed inside another device, the device into which the module is installed must display
a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains FCC ID: Z7H-EMBLR1302” or similar.

IC: Data

IC ID: 21487-EMBLR1302
Brand: Ambit
Model: EMB-LR1302-mPCIe
Power supply: 5V VDC
Transmission frequency: 902-918 MHz

The device complies with the Industry Canada RSS Rules. Operation is subjected to the following 2 conditions: (1) this device may not cause harmful interference and (2) this
device must accept any interference received, including interference that may cause undesired operation.

 IC: Maximum Output power

The IC regulation allows for up to 30 dB or output power plus up to 6 dBi of assembly gain which translates into up to +36 dBm of EIRP. The modules EMB- LR1302-mPCIe can output up to +27 dBm and so when using the allowed antenna, will have no problems with the output power limit. Spurious emission and spectral density don’t
limit the output power neither on the EMB-LR1302-mPCIe and so every output power setting can be used.

NB: in the standard use of the device a minimum distance of 20 cm between the radiant element and the human body has to be maintained

Mechanical Characteristics

References

1.  Semtech, SX1302 Datasheet from www.semtech.com
2. Semtech, SX1250 Datasheet from www.semtech.com
3. Semtech, SX1261 Datasheet from www.semtech.com

Disclaimer of liability

The user must read carefully all the documentation available before using the product. In particular, care must be taken in order to comply with the regulations (e.g., power limits, duty cycle limits, etc.).

Handling Precautions

This product is an ESD-sensitive device. Handling precautions should be carefully observed.

Limitations

Every operation involving a modification on the internal components of the module will void the warranty.

 Disclaimer of Liability

The information provided in this and other documents associated to the product might contain technical inaccuracies as well as typing errors. Regulations might also vary in time. Updates to these documents are performed periodically and the information provided in these manuals might change without notice. The user is required to ensure that the documentation is updated and the information contained is valid. Gambit reserves the right to change any of the technical/functional specifications as well as to discontinue manufacture or support of any of its products without any written announcement.

Trademarks

Ambit is a registered trademark owned by Ambit s.r.l.

All other trademarks, registered trademarks, and product names are the sole proprietary of their respective owners.

User Manual EMB-LR1302-mPCIe

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