Swarm M138 - Safety Information and Compliance

Revision History 4
Additional Resources: 4
1 Safety Information and Compliance 7
1.1 FCC Compliance 7
1.2 ISED Compliance 7
1.3 RF Exposure Guidance 7
1.4 EU RED Certification 8
1.5 Transceiver Regulatory Certification 8
2 Product Overview 9
3 Mechanical Specification 10
3.1 Modem Dimensions 10
3.2 Environmental 11
3.3 Moisture Sensitivity Level 11
4 Electrical Interfaces 12
4.1 User Host Device 12
4.2 Modem Pin Allocation 13
4.3 DC Power Interface 15
4.4 Power On/Off Control 18
4.5 Serial Data Interface 18
4.6 LED Indicators 19
5 Design Guidance 20
5.1 Input Connections 20
5.2 Decoupling and Feed-through Capacitors 20
5.3 Input Voltage Examples 21
5.4 Communications 23
5.4.1 Level Shifting 24
5.5 Example Design 25
6 RF Interfaces 27
6.1 RF Connectors 27
6.2 RF Antenna 27
6.2.1 Antenna Characteristics 28
6.2.2 Ground Plane Requirements 29
6.3 Antenna Debugging 31
November 2021 Swarm M138 Modem Manual - Rev 1.00 5/77