Issue link: https://read.uberflip.com/i/1428362
LoRaWAN 1.0.2 Regional Parameters ©2017 LoRa Alliance™ Page 22 of 55 The authors reserve the right to change specifications without notice. 8:15 Not defined Table 23 : CN780 maximum payload size (not repeater compatible) 608 2.3.7 CN779-787 Receive windows 609 The RX1 receive window uses the same channel than the preceding uplink. The data rate is 610 a function of the uplink data rate and the RX1DROffset as given by the following table. The 611 allowed values for RX1DROffset are in the [0:5] range. Values in the range [6:7] are 612 reserved for future use 613 614 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 DR4 DR4 DR3 DR2 DR1 DR0 DR0 DR5 DR5 DR4 DR3 DR2 DR1 DR0 DR6 DR6 DR5 DR4 DR3 DR2 DR1 DR7 DR7 DR6 DR5 DR4 DR3 DR2 Table 24: CN780 downlink RX1 data rate mapping 615 The RX2 receive window uses a fixed frequency and data rate. The default parameters are 616 786 MHz / DR0. 617 2.3.8 CN779-787 Class B beacon and default downlink channel 618 The beacons SHALL be transmitted using the following settings 619 DR 3 Corresponds to SF9 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 Table 25: CN780 beacon settings 620 The beacon frame content is: 621 Size (bytes) 2 4 2 7 2 BCNPayload RFU Time CRC GwSpecific CRC The beacon default broadcast frequency is 785MHz. 622 The class B default downlink pingSlot frequency is 785MHz 623 624 2.3.9 CN779-787 Default Settings 625 The following parameters are recommended values for the CN779-787MHz band. 626 RECEIVE_DELAY1 1 s 627 RECEIVE_DELAY2 2 s (must be RECEIVE_DELAY1 + 1s) 628 JOIN_ACCEPT_DELAY1 5 s 629 JOIN_ACCEPT_DELAY2 6 s 630 MAX_FCNT_GAP 16384 631 ADR_ACK_LIMIT 64 632