Issue link: https://read.uberflip.com/i/1540208
Regional Parameters RP002-1.0.5 ©2022-2025 LoRa Alliance ® Page 62 of 116 The authors reserve the right to change specifications without notice. 3.8.7 AU915-928 Receive Windows 1219 • The RX1 receive channel is a function of the upstream channel used to initiate the data 1220 exchange. The RX1 receive channel can be determined as follows: 1221 o RX1 Channel Number = Transmit Channel Number modulo NbChannel, 1222 where NbChannel is the number of active receive channels. 1223 • The RX1 window data rate depends on the transmit data rate (see Table 26). 1224 • The RX2 (second receive window) settings uses a fixed data rate and frequency. 1225 Default parameters are 923.3 MHz / DR8. 1226 1227 Uplink Data Rate Downlink Data Rate RX1DROffset 0 1 2 3 4 5 DR0 DR8 DR8 DR8 DR8 DR8 DR8 DR1 DR9 DR8 DR8 DR8 DR8 DR8 DR2 DR10 DR9 DR8 DR8 DR8 DR8 DR3 DR11 DR10 DR9 DR8 DR8 DR8 DR4 DR12 DR11 DR10 DR9 DR8 DR8 DR5 DR13 DR12 DR11 DR10 DR9 DR8 DR6 DR13 DR13 DR12 DR11 DR10 DR9 DR7 DR9 DR8 DR8 DR8 DR8 DR8 DR9 DR14 DR13 DR12 DR11 DR10 DR9 DR10 DR0 DR14 DR13 DR12 DR11 DR10 Table 46: AU915-928 downlink RX1 data rate mapping 1228 The allowed values for RX1DROffset are in the [0:5] range. Values in the range [6:7] are 1229 reserved for future use and end-devices SHALL NOT accept these settings in any command, 1230 neither a RXParamSetupReq, which SHALL cause a negative acknowledgement of 1231 RX1DROffsetACK in RXParamSetupAns, nor a Join-Accept which SHALL be silently 1232 ignored. 1233 3.8.8 AU915-928 Class B Beacon 1234 The downstream channel used for a given beacon is: 1235 Channel = [ ( _ _ ) ] 8 1236 • where beacon_time is the integer value of the 4-byte Time field of the beacon frame 1237 • where beacon_period is the periodicity of beacons, 128 seconds 1238 • where floor(x) designates rounding to the integer immediately inferior or equal to x 1239 Example: The first beacon will be transmitted on 923.3 MHz, the second 1240 on 923.9 MHz, the 9 th beacon will be on 923.3 MHz again. 1241 1242 Beacon Channel Number Frequency [MHz] 0 923.3 1 923.9 2 924.5 3 925.1 4 925.7 5 926.3 6 926.9 7 927.5 Table 47: AU915-928 beacon channels 1243 1244