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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
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	47	+
47	47	== 2.2  Adaptive Data Rate (ADR) and set max distance ==
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49	49
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88	88	* (% style="color:#037691" %)**AT+DR=  0**     (%%)~/~/  Use the smallest DR
89	89	* (% style="color:#037691" %)**AT+TXP=0**    (%%) ~/~/  Use max power.
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	92	+
	93	+
91	91	= 3.  Analyze at the hardware side =
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93	93	== 3.1  Check if the antenna path is good ~-~- For LSn50v2 series end node ==
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107	107	== 4.1  Check the use environment ==
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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.
	113	+First , User should notice: Radio link quality and performances are highly dependent of the environment.
111	111
112	112	(% style="color:blue" %)**Better performances can be reached with:**
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123	123	* High ISM band usage by other technologies.
124	124	* 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	+
126	126	== 4.2  Improve the Antenna ==
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166	166	[[image:image-20221031233759-3.png]]
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169		-[[image:image-20221101000006-1.png||height="353" width="931"]]
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173		-
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