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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: [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
	1015	+LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:
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...	...	@@ -1031,19 +1031,39 @@
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1032	1032	= 5.  Trouble Shooting =
1033	1033
1034		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
	1034	+== 5.1  AT Commands input doesn’t work ==
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	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	+)))
1037	1037
1038		-== 5.2  AT Command input doesn't work ==
1039	1039
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.
	1042	+== 5.2  Significant error between the output distant value of LiDAR and actual distance ==
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	1044	+
1042	1042	(((
	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	+(((
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1044	1044	)))
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	1057	+(((
	1058	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1059	+)))
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	1061	+(((
	1062	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
	1063	+)))
	1064	+
	1065	+
	1066	+
1047	1047	= 6.  Order Info =
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...	...	@@ -1067,7 +1067,6 @@
1067	1067	* (% style="color:red" %)**8**(%%): 8500mAh battery
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1069	1069
1070		-
1071	1071	= 7. ​ Packing Info =
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...	...	@@ -1083,7 +1083,6 @@
1083	1083	* Weight / pcs : g
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1085	1085
1086		-
1087	1087	= 8.  ​Support =
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1089	1089	* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.