RisingHF RHF2S208, User Manual

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V1.1 2018-10-9
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RHF2S208 User Manual
RisingHF
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In combination with description above, SX1301 has below features:
1. One SX1301 supports 2 Radios. SX1255 or SX1257 can be used .
2. One SX1301 could support maximum 10 channels, of which 8 Multi-SF channels, 1 standard
channel and 1 FSK channel.
3. One single SX125x chip has below limitations.
Lower Side Channel
Bandwidth
Upper Side Channel
Bandwidth
SX125x Bandwidth
125KHz 125KHz
925KHz
250KHz 250KHz 1MHz
500KHz 500KHz
1.1MHz
125KHz 250KHz 962.5KHz
250KHz 125KHz
962.5KHz
500KHz 250KHz 1.05MHz
250KHz 500KHz
1.05MHz
500KHz 125KHz 1.0125MHz
125KHz 500KHz 1.0125MHz
LoRa Module hardware structures:
Figure 5-1 LoRa Module hardware structures
5.1.1 Customized channels
User could follow below principles to customize different frequency channel.
1. Split defined channels to two group for radio_0(radio_a) and radio_1(radio_b), calculate central
frequency. Set
SX1301_conf.radio_0.freq
and
SX1301_conf.radio_1.freq
the new value.
2. Choose
SX1301_conf.radio_0.type
and
SX1301_conf.radio_1.type
depends on the new radio frequency. If it
is higher than 520MHz set radio type
SX1257
, if it is less than 520MHz set radio type
SX1255
. (Note:
real products have a narrow band support, please follow specified specification for the details)
3. Refer to the RHF-DS01603 document to get device configuration parameters, include RSSI offset
and radio frequency TX power. Set
SX1301_conf.radio_0.rssi_offset
and
SX1301_conf.radio_1.rssi_offset
and
tx_lut_xxx
value
4. Calculate IF channel offset value. Modify
SX1301_conf.chan_multiSF_xxx
,
SX1301_conf.chan_Lora_std
和
SX1301_conf.chan_FSK
object. Channel configuration follows below rules.
a) Each IF channel can be associated with either radio0 or radio1 freely.
b) Each IF channel offset can't be out of range the SX125x bandwidth limitation, or the IF channel
setting will be invalid.
c) Each IF channel can be enable or disable independently .
5. So the example json file contains below channels:
d) CH0 868.1MHz Multi-SF
e) CH1 868.3MHz Multi-SF
f) CH2 868.5MHz Multi-SF
SX125x (1)
SX1301
SX125x (0)
RFSW
/Duplexer