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...	...	@@ -1012,7 +1012,7 @@
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1013	1013	== 4.1  What is the frequency plan for LDDS75? ==
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1015		-LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:
	1015	+LDDS75 use the same frequency as other Dragino products. User can see the detail from this link: [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
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...	...	@@ -1031,39 +1031,19 @@
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1032	1032	= 5.  Trouble Shooting =
1033	1033
1034		-== 5.1  AT Commands input doesn’t work ==
	1034	+== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
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1036	1036
1037		-(((
1038		-In the case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1039		-)))
1040	1040
	1038	+== 5.2  AT Command input doesn't work ==
1041	1041
1042		-== 5.2  Significant error between the output distant value of LiDAR and actual distance ==
	1040	+In the case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1043	1043
1044		-
1045	1045	(((
1046		-(% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance (such as glass and water, etc.)
1047		-)))
1048		-
1049		-(((
1050		-Troubleshooting: Please avoid use of this product under such circumstance in practice.
1051		-)))
1052		-
1053		-(((
1054	1054
1055	1055	)))
1056	1056
1057		-(((
1058		-(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
1059		-)))
1060	1060
1061		-(((
1062		-Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1063		-)))
1064		-
1065		-
1066		-
1067	1067	= 6.  Order Info =
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