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44	44	|(% style="width:134px" %)**US915**|(% style="width:400px" %)20 or 22 dBm (depends on max output of module)|(% style="width:362px" %)SF=10|(% style="width:102px" %)125Khz
45	45	|(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz
46	46
47		-
48	48	== 2.2  Adaptive Data Rate (ADR) and set max distance ==
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50	50
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89	89	* (% style="color:#037691" %)**AT+DR=  0**     (%%)~/~/  Use the smallest DR
90	90	* (% style="color:#037691" %)**AT+TXP=0**    (%%) ~/~/  Use max power.
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92		-
93		-
94	94	= 3.  Analyze at the hardware side =
95	95
96	96	== 3.1  Check if the antenna path is good ~-~- For LSn50v2 series end node ==
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110	110	== 4.1  Check the use environment ==
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113		-First , User should notice: Radio link quality and performances are highly dependent of the environment.
	110	+First , User should notice: Radio link quality and performances are highly dependent of the environment.Even you have the same hardware and antenna, Different installation will result in different performance.
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115	115	(% style="color:blue" %)**Better performances can be reached with:**
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126	126	* High ISM band usage by other technologies.
127	127	* Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small.
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129		-
130		-
131	131	== 4.2  Improve the Antenna ==
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171	171	[[image:image-20221031233759-3.png]]
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	169	+[[image:image-20221101000006-1.png||height="353" width="931"]]
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