8
RA
K20
11
RAK
7248
8
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.
