Issue link: https://read.uberflip.com/i/1428362
LoRaWAN 1.0.2 Regional Parameters ©2017 LoRa Alliance™ Page 35 of 55 The authors reserve the right to change specifications without notice. ChMaskCntl ChMask applies to The device should enable all currently defined channels independently of the ChMask field value. 7 RFU Table 42: CN470 ChMaskCntl value table 937 If the ChMask field value is one of the values meaning RFU, then end-device should reject 938 the command and unset the "Channel mask ACK" bit in its response. 939 2.6.6 CN470-510 Maximum payload size 940 The maximum MACPayload size length (M) is given by the following table. It is derived from 941 the maximum allowed transmission time at the PHY layer taking into account a possible 942 repeater encapsulation. The maximum application payload length in the absence of the 943 optional FOpt MAC control field (N) is also given for information only. The value of N might 944 be smaller if the FOpt field is not empty: 945 DataRate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 230 222 5 230 222 6:15 Not defined Table 43: CN470-510 maximum payload size 946 If the end-device will never operate with a repeater then the maximum application payload 947 length in the absence of the optional FOpt control field should be: 948 949 DataRate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 250 242 5 250 242 6:15 Not defined Table 44 : CN470-510 maximum payload size (not repeater compatible) 950 951 2.6.7 CN470-510 Receive windows 952 The RX1 receive channel is a function of the upstream channel used to initiate the 953 data exchange. The RX1 receive channel can be determined as follows. 954 o RX1 Channel Number = Uplink Channel Number modulo 48, for example, 955 when transmitting channel number is 49, the rx1 channel number is 1. 956 The RX1 window data rate depends on the transmit data rate (see Table below). 957 The RX2 (second receive window) settings uses a fixed data rate and frequency. 958 Default parameters are 505.3 MHz / DR0 959 960 RX1DROffset 0 1 2 3 4 5 Upstream data rate Downstream data rate in RX1 slot DR0 DR0 DR0 DR0 DR0 DR0 DR0 DR1 DR1 DR0 DR0 DR0 DR0 DR0 DR2 DR2 DR1 DR0 DR0 DR0 DR0 DR3 DR3 DR2 DR1 DR0 DR0 DR0