Setpacketparam; Table 8-20: Setpacketparam Command; Table 8-21: Pbldetect: Preamble Detector Length - Semtech LR1110 User Manual

Table 8-19: Bandwidth Parameter
• Fdev defines the deviation frequency (in Hz).

8.5.2 SetPacketParam

The command SetPacketParam( ) allows to configure the parameters of the RF packet for the selected modem. Since the
parameters are modem dependent, the description hereafter is valid only for the (G)FSK modem.

Table 8-20: SetPacketParam Command

Byte 0
Data from Host 0x02
Data to Host Stat1
•
PbLengthTX defines the length of the (G)FSK packet preamble in bits. Coded on 2 Bytes, from 0x0008 (8 bits) to 0xFFFF
(65535 bits).
•
PblDetect defines the preamble detector length. The preamble detector acts as a gate to the packet controller, when
different from 0x00 (preamble detector length off), the packet controller will only become active if a certain number of
preamble bits have been successfully detected by the radio.

Table 8-21: PblDetect: Preamble Detector Length

PblDetect
0x00
0x04
0x05
0x06
0x07
• SyncWordLen defines the length of the Syncword in bits. The Syncword is directly programmed into the device through
the command SetGfskSyncWord( ).
LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
BWF
0x11
0x09
1 2 3
PbLength PbLength
0x10
TX(15:8) TX(7:0)
Irq Irq
Stat2
Status Status
(31:24) (23:16)
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RX_BW_373600 (373.6 kHz DSB)
RX_BW_467000 (467 kHz DSB)
4 5 6
Pbl Sync Addr
Detect WordLen Comp
Irq Irq
0x00
Status Status
(15:8) (7:0)
Description
Preamble detector length off
Preamble detector length 8 bits
Preamble detector length 16 bits
Preamble detector length 24 bits
Preamble detector length 32 bits
Description
7 8 9
Packet Payload Crc
Type Len Type
0x00 0x00 0x00
10
DcFree
0x00
64 of 130
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