RFD TX Module User Manual
www.rfdesign.com.au
13
Version 1.0 Last update 07/03/2019
Min frequency in KHz
S9
MAX_FREQ
Max frequency in KHz
928000
/869000
4
928000
/870000
4
903000
/869000
4
Yes
S10
NUM_CHANNELS
Number of frequency hopping channels
20
50
1
Yes
S11
DUTY_CYCLE
The percentage of time to allow transmit
100
100
10
No
S12
LBT_RSSI
Listen before talk threshold
(This parameter shouldn’t be changed)
0
220
25
Yes
S13
RTSCTS
Ready-to-send and Clear-to-send flow
control.
0
1
0
No
S14
Max Window
Max transit window size used to limit
max time/latency if required otherwise
will be set automatically
131
400
20
Yes
S15
Encryption Level
Encryption level 0=off, 1=128bit AES
0
1
0
Yes
S16
R/C input GPIO1.1
Set GPIO 1.1 as R/C(PPM) input
0
1
0
No
S17
R/C output GPIO1.1
Set GPIO 1.1 as R/C(PPM) output
0
1
0
No
S18
5
ANT_MODE
0= Diversity, 1= Antenna 1 only, 2=
Antenna 2 only, 3= Antenna 1 TX and
antenna 2 RX
0
3
0
No
S19
5
PKT_DROP_RSSI
Sets a RSSI threshold below which the
packet will be discarded. 0 disables the
feature
0
255
0
No
R0
TARGET_RSSI
Optimal RSSI value to try to sustain (255
disables the feature)
255
50
255
No
R1
HYSTERESIS_RSSI
Amount of change before power levels
altered
50
20
50
No
Table 3: RFD900x SiK firmware parameters
Notes:
1
ECC - Software Detection and correction, extra packet information, twice the packet length, is sent to allow the recovery of corrupted
packets.
2
Injects RSSI packet when MAVLink protocol used and heartbeat packet detected.
3
Maximum from version 2.60 onwards
4
868 modems
5
Introduced in V2.55
a)
Modifying parameters with the TX Module web interface
