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Changes for page Change Gateway Power

Last modified by Xiaoling on 2022/08/10 15:18
From version 1.2
edited by Xiaoling
on 2022/05/14 13:43
Change comment: There is no comment for this version
To version 5.1
edited by Edwin Chen
on 2022/06/20 17:43
Change comment: There is no comment for this version

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Author
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1 -XWiki.Xiaoling
1 +XWiki.Edwin
Content
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1 += Introduction =
2 +
3 +----
4 +
5 +In LoRaWAN protocol, the gateway output power refer to the downstream packets sent by Gateway. This output power is controlled by LoRaWAN server.
6 +
7 +Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
8 +
9 +
10 +(% class="box" %)
11 +(((
12 +"tx_lut_3": {
13 + "desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain 
14 + "pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
15 + "mix_gain": 10,
16 + "rf_power": 15,
17 + "dig_gain": 1
18 +},
19 +"tx_lut_4": {
20 + "desc": "TX gain table, index 4",
21 + "pa_gain": 2,
22 + "mix_gain": 10,
23 + "rf_power": 16,
24 + "dig_gain": 0
25 +)))
26 +
27 +
28 +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.
29 +
30 +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.
31 +
32 +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
33 +