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1		-XWiki.Xiaoling
	1	+XWiki.Kilight

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1		-= Introduction =
	1	+= Overview: =
2	2
3		-(((
4		-In LoRaWAN protocol, the gateway output power refer to the downstream packets sent by Gateway. This output power is controlled by LoRaWAN server.
5		-)))
	3	+In LoRaWAN protocol, the gateway transmit packet uses the output power base on the Power Index from the LoRaWAN server downlink. for example, the LoRaWAN server sends a downlink with this info "rf_power=14", gateway got this info and it will search the index for rf_power=14 and use the related rf setting to set output power. In some cases, the LoRaWAN server might set the rf-power to a quite low value ( for example 0dB) which is not practical for use. In such a case, the User can manually change the rf_power=0's rf settings to a higher power out. Below are the methods.
6	6
7		-(((
8		-Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
9		-)))
10	10
	6	+= Change Power for Semtech UDP Paket forward connection =
	7	+
	8	+----
	9	+
	10	+In LoRaWAN protocol, the gateway output power refers to the downstream packets sent by Gateway. This output power is controlled by the LoRaWAN server.
	11	+
	12	+Gateway maintains a power index in the file: /etc/lora/global_conf.json for example:
	13	+
	14	+
11	11	(% class="box" %)
12	12	(((
13		-(((
14	14	"tx_lut_3": {
15	15	"desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain
16	16	"pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
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25	25	"rf_power": 16,
26	26	"dig_gain": 0
27	27	)))
28		-)))
29	29
30		-(((
31		-When LoRaWAN server sends a downlink stream, server will also ask the gateway to use which rf_power as output. So user don't need to consider to control in the gateway side.
32		-)))
	32	+(% class="mark" %)Note: If when lorawan server specifies a rf_power that is not listed above. gateway will choose the closest power. profile.
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34		-(((
35		-
36		-)))
37	37
38		-(((
39		-If user want to always use a higher power or a lower power. User can modify the pa_gain,mix_gain,dig_gain for specify rf_power to achieve this purpose. This is not recommend, because this might break the regulator for specify country.
40		-)))
	35	+When the LoRaWAN server sends a downlink stream, the server will also ask the gateway to use rf_power as output. So users don't need to consider controlling on the gateway side.
41	41
42		-(((
43		-
44		-)))
	37	+If users want to always use a higher power or a lower power. Users can modify the pa_gain,mix_gain, and dig_gain to specify rf_power to achieve this purpose. This is not recommended, because this might break the regulator for a specific country.
45	45
46		-(((
47		-Please note, the global_conf.json file will be overwrite by the match region files in /etc/lora/cfg-30x when change settings in the web. So user need to change the files in /etc/lora/cfg-cfg-30x instead of global_conf.json
48		-)))
	39	+Please note, that the global_conf.json file will be overwritten by the match region files in /etc/lora/cfg-30x when changing settings on the web. So the user needs to change the files in /etc/lora/cfg-cfg-30x instead of global_conf.json
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	41	+
	42	+= Change Power for LoRaWAN Basic Station connection =
	43	+
	44	+----
	45	+
	46	+When users use LoRaWAN Basic Station， How to Change the Power for the LoRaWAN Basic Station connection?
	47	+
	48	+If users want to always use a higher power or a lower power. Users can modify the pa_gain,mix_gain, and dig_gain to specify rf_power to achieve this purpose. This is not recommended, because this might break the regulator for a specific country.
	49	+
	50	+