User's Manual
Table Of Contents
- Overview
- Introduction
- Main Features
- Package Contents
- WisGate RAK7248
- Overview
- Interface
- SystemStructure
- RaspberryPi
- LoRa Operating Frequencies
- 2.9.1 Transmitter RF Characteristics
- 2.9.2 Receiver RF Characteristics
- Antenna
- LoRa Antenna
- 3.1.1 Overview
- 3.1.2Antenna Dimension
- 3.1.3Antenna Parameter
- 3.2.1Overview
- 3.2.2GPS Antenna Dimensions
- 3.2.3GPS Environmental Requirements
- 3.2.4GPS Antenna Parameter
- FCCCaution
- ISEDC Warning
- Revision History
- Document Summary
8
RA
K20
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RAK7248
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2.8. Environmental Requirements
The table below lists the operation and storage temperature requirements:
Parameter Min. Typical Max.
Operation Temperature Range -20 ºC +25 ºC +65 ºC
Extended Temperature Range -40 ˚C
+85 ˚C
Storage Temperature Range -40 ˚C
+85 ˚C
Table 3| Environment Requirements
2.9. LoRa RF Characteristics
2.9.1 Transmitter RF Characteristics
The RAK2287 has an excellent transmitter performance. It is highly recommended to use an
optimized configuration for the power level configuration, which is part of the HAL. This
results in a mean RF output power level and current consumption.
Frequency Range Transmit Power Modulation
Technique
923.3-927.5 MHz 13.39dBm LoRa / FSK
Table 4| TX RF Characteristics
2.9.2 Receiver RF Characteristics
It is highly recommended, to use optimized RSSI calibration values, which is part of the HAL
v3.1. For both, Radio 1 and 2, the RSSI-Offset should be set -169.0. The following table
gives typically sensitivity level of the RAK2287.
Signal Bandwidth / [KHz] Spreading Factor Sensitivity / [dBm]
500 12 -134
500 7 -120
Table 5| RX RF Characteristics
3. Antenna
3.1. LoRa Antenna
3.1.1 Overview
The LoRa Antenna with RP-SMA female connector shown as follow figures.