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Regional Parameters RP002-1.0.5 ©2022-2025 LoRa Alliance ® Page 72 of 116 The authors reserve the right to change specifications without notice. 3.9.7.2 Channel Plan for 26 MHz Antenna Systems 1436 • For both plans, the RX1 receive channel is a function of the upstream channel used to 1437 initiate the data exchange. The RX1 receive channel can be determined as follows: 1438 o RX1 Channel Number = Transmit Channel Number modulo 24 1439 • The RX2 default frequency is: 1440 o For Channel plan A: 492.5 MHz 1441 o For Channel plan B: 502.5 MHz 1442 3.9.8 CN470-510 Class B Beacon 1443 The beacon frame content is defined in Section 5.1.3. 17 1444 The beacons are transmitted using the following settings: 1445 1446 DR 2 Corresponds to SF10 spreading factor with 125 kHz BW CR 1 Coding rate = 4/5 Signal polarity Non-inverted As opposed to normal downlink traffic, which uses inverted signal polarity frequencies Defined per plan below Table 59: CN470-510 beacon settings 1447 3.9.8.1 Default Beacon and Ping-Slot Channel Numbers and Ping-Slots for 20 MHz 1448 Antenna Systems 1449 Defaults for Channel plan Type A are shown in the following table along with the downstream 1450 channel used for beacons, according to the common join channel the end-device used: 1451 1452 Common Join Channel Index Beacon Channel Number 0 [ ( _ _ )] 8 1 8 + [ ( _ _ ) ] 8 2 16 + [ ( _ _ ) ] 8 3 24 + [ ( _ _ ) ] 8 4 32 + [ ( _ _ ) ] 8 5 40 + [ ( _ _ ) ] 8 6 48 + [ ( _ _ ) ] 8 7 56 + [ ( _ _ ) ] 8 Table 60: Beacon channel number for channel plan type A for 20 MHz antenna 1453 • where beacon_time is the integer value of the 4-byte Time field of the beacon 1454 frame 1455 • where beacon_period is the periodicity of beacons, 128 seconds 1456 • where floor(x) designates rounding to the integer immediately inferior or equal to 1457 x 1458 17 Prior to LoRaWAN 1.0.4, the CN470 beacon format was defined here as: Size (bytes) 3 4 2 7 1 2 BCNPayload RFU Time CRC GwSpecific RFU CRC