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	1	+= Introduction =
	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.
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	6	+
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	8	+Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
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	10	+
	11	+(% class="box" %)
	12	+(((
	13	+"tx_lut_3": {
	14	+ "desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain
	15	+ "pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
	16	+ "mix_gain": 10,
	17	+ "rf_power": 15,
	18	+ "dig_gain": 1
	19	+},
	20	+"tx_lut_4": {
	21	+ "desc": "TX gain table, index 4",
	22	+ "pa_gain": 2,
	23	+ "mix_gain": 10,
	24	+ "rf_power": 16,
	25	+ "dig_gain": 0
	26	+)))
	27	+
	28	+(((
	29	+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.
	30	+)))
	31	+
	32	+(((
	33	+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.
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	35	+
	36	+(((
	37	+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
	38	+)))