Version 83.2 by Xiaoling on 2022/08/23 09:16

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Xiaoling 69.2 1 (% style="text-align:center" %)
Edwin Chen 43.1 2 [[image:image-20220620202334-2.png||height="467" width="809"]]
Xiaoye 4.1 3
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Xiaoling 69.2 6
Xiaoye 4.1 7
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Xiaoye 5.1 10
11 **Table of Contents:**
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13 {{toc/}}
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Xiaoling 69.2 15
Xiaoling 83.2 16
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Kilight Cao 11.1 19 = **1. Introduction** =
Xiaoye 5.1 20
Xiaoling 83.2 21
Kilight Cao 12.1 22 == **1.1 What is LPS8v2** ==
Xiaoye 5.1 23
Xiaoling 69.2 24
Xiaoye 5.1 25 (((
Xiaoling 69.7 26 (((
Edwin Chen 44.1 27 The LPS8v2 is an (% style="color:green" %)**open-source LoRaWAN Gateway**(%%). It lets you bridge LoRa wireless network to an IP network via (% style="color:green" %)**WiFi , Ethernet or Cellular Network**(%%) (via Optional 4G module). The LoRa wireless allows users to send data and reach extremely long ranges at low data rates.
Xiaoling 69.7 28 )))
Xiaoye 6.2 29
Xiaoling 69.7 30 (((
Edwin Chen 44.1 31 The LPS8v2 is fully compatible with LoRaWAN protocol. It supports different kinds of LoRaWAN Network Connections such as: (% style="color:green" %)**Semtech UDP Packet Forwarder, LoRaWAN Basic Station, ChirpStack MQTT Bridge**(%%), and so on. This makes LPS8V2 work with most LoRaWAN platforms in the market.
Xiaoling 69.7 32 )))
Xiaoye 6.2 33
Xiaoling 69.7 34 (((
Edwin Chen 44.1 35 LPS8v2 also includes a (% style="color:green" %)**built-in LoRaWAN Server and IoT server**(%%), which provide the possibility for the system integrator to deploy the IoT service without cloud service or 3rd servers.
Xiaoling 69.7 36 )))
Xiaoye 6.2 37
Xiaoling 69.7 38 (((
Edwin Chen 43.1 39 Different countries use different LoRaWAN frequency bands. LPS8v2 has these bands pre-configured. Users can also customize the frequency bands to use in their own LoRa network.
Xiaoling 69.7 40 )))
Xiaoye 6.2 41
Xiaoling 69.7 42 (((
Edwin Chen 44.1 43 LPS8v2 supports (% style="color:green" %)**remote management**(%%). System Integrator can easy to remote monitor the gateway and maintain it.
Xiaoling 69.7 44 )))
Edwin Chen 43.1 45
46
Xiaoling 69.2 47
Kilight Cao 11.1 48 == **1.2 Specifications** ==
Xiaoye 6.2 49
50
Xiaoling 69.2 51 (% style="color:#037691" %)**Hardware System:**
52
Edwin Chen 46.1 53 * CPU: Quad-core Cortex-A7 1.2Ghz
Xiaoye 6.2 54 * RAM: 512MB
55 * eMMC: 4GB
56
Xiaoling 69.2 57 (% style="color:#037691" %)**Interface:**
Xiaoye 6.2 58
59 * 10M/100M RJ45 Ports x 1
Edwin Chen 45.1 60 * Multi-Channel LoRaWAN Wireless
Edwin Chen 43.1 61 * WiFi 802.11 b/g/n
Xiaoye 6.2 62
Xiaoling 69.2 63 (% style="color:#037691" %)**Operating Condition:**
Xiaoye 6.2 64
65 * Work Temperature: -20 ~~ 65°C
66 * Storage Temperature: -20 ~~ 65°C
Edwin Chen 45.1 67 * Power Input: 5V, 2A, DC
Xiaoye 6.2 68
Xiaoling 83.2 69
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Kilight Cao 11.1 72 == **1.3 Features** ==
Xiaoye 6.2 73
Xiaoling 69.2 74
Xiaoye 6.2 75 * Open Source Debian system
76 * Managed by Web GUI, SSH via WAN or WiFi
Edwin Chen 45.1 77 * Remote Management
Edwin Chen 49.1 78 * Auto-provisioning for batch deployment and management
Xiaoye 6.2 79 * LoRaWAN Gateway
80 * 10 programmable parallel demodulation paths
Xiaoye 26.1 81 * Pre-configured to support different LoRaWAN regional settings.
Kilight Cao 11.1 82 * Allow customizing LoRaWAN regional parameters.
Edwin Chen 45.1 83 * Different kinds of LoRaWAN Connections such as
84 ** Semtech UDP Packet Forwarder
85 ** LoRaWAN Basic Station
86 ** ChirpStack-Gateway-Bridge (MQTT)
Xiaoling 69.2 87 * Built-in (% style="color:#037691" %)//**The Things Network**//(%%) local LoRaWAN server
88 * Built-in  (% style="color:#037691" %)//**Node-Red**// (%%)local Application server
Xiaoye 6.2 89
Kilight Cao 11.1 90 == **1.4 Block Diagram** ==
Xiaoye 6.2 91
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Xiaoling 69.3 93
Xiaoye 35.1 94 == **1.5 LED Indicators** ==
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Xiaoling 69.3 96
Xiaoye 35.1 97 LPS8-V2 has totally four LEDs, They are:
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Xiaoling 69.3 100 (% style="color:blue" %)//**➢ Power LED**//(%%)//: This RED LED will be solid if the device is properly powered//
Xiaoye 35.1 101
Xiaoling 69.3 102 (% style="color:blue" %)//**➢ LoRa LED**//(%%)//: This RGB LED will blink GREEN when the LoRaWAN module starts or transmit a packet//
Xiaoye 35.1 103
Xiaoling 69.3 104 (% style="color:blue" %)//**➢ SYS LED**//(%%)//: This RGB LED will show different colors in different states~://
Xiaoye 35.1 105
Xiaoling 69.3 106 // ✓ **SOLID BLUE:** The device is alive with a LoRaWAN server connection.//
Xiaoye 35.1 107
Xiaoling 69.3 108 // ✓ **BLINKING BLUE:** a) Device has internet connection but no LoRaWAN Connection. or b) Device is in booting stage, in this stage, it will BLINKING BLUE for several seconds and then with SOLID RED and BLINKING BLUE together//
Xiaoye 35.1 109
Xiaoling 69.4 110 // ✓** SOLID RED:** Device doesn't have an Internet connection.//
Xiaoye 35.1 111
Xiaoling 69.3 112 (% style="color:blue" %)//**➢ ETH LED**//(%%)//: This LED shows the ETH interface connection status.//
Xiaoye 35.1 113
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Xiaoling 69.3 115
Xiaoye 26.1 116 = **2. Quick Start** =
Xiaoye 8.1 117
Xiaoling 69.4 118
Xiaoye 26.1 119 The LPS8-V2 supports network access via Ethernet or Wi-Fi connection and runs without a network.
Xiaoye 8.1 120
Xiaoye 26.1 121 In most cases, the first thing you need to do is make the lps8-v2 accessible to the network.
Xiaoye 8.1 122
123
Xiaoling 69.4 124
Xiaoye 35.1 125 == **2.1 Connects to the network and accesses the gateway Web UI** ==
Xiaoye 8.1 126
127
Xiaoye 35.1 128 == **2.1.1 connect the network.** ==
Xiaoye 8.1 129
130
Xiaoling 69.4 131 === (% style="color:blue" %)**Method 1**(%%):  Connect via Ethernet with DHCP IP from the router ===
Xiaoye 26.1 132
Xiaoling 69.4 133
Xiaoling 69.10 134 (((
Xiaoye 35.1 135 Connect the LPS8-V2 Ethernet port to your router and LPS8 can obtain an IP address from your router. In the router's management portal, you should be able to find what IP address the router has assigned to the LPS8-V2.
Xiaoling 69.10 136 )))
Xiaoye 26.1 137
Xiaoling 69.10 138 (((
Xiaoye 35.1 139 You can also use this IP to connect.
Xiaoling 69.10 140 )))
Xiaoye 35.1 141
142 [[image:image-20220622100129-1.png||height="332" width="1263"]]
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Xiaoling 69.4 146 === (% style="color:blue" %)**Method 2**(%%):  Connect via WiFi with DHCP IP from the router ===
Xiaoye 35.1 147
Xiaoling 69.4 148
Xiaoye 35.1 149 [[image:image-20220622100542-2.png||height="369" width="1256"]]
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Xiaoling 69.11 152 (((
Xiaoye 35.1 153 The LPS8-V2 has a fall-back IP address on its WAN port. you have to access the gateway Web-UI to configure the WiFi connection via the fallback IP address.
Xiaoling 69.11 154 )))
Xiaoye 35.1 155
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Xiaoling 69.4 158 (% style="color:#037691" %)**Steps to connect via fallback IP:**
Xiaoye 35.1 159
Xiaoling 69.11 160 ~1. Connect PC's Ethernet port to LPS8-V2's WAN port
Xiaoling 69.4 161
Xiaoye 35.1 162 2. Configure PC's Ethernet port has  IP: 172.31.255.253 and Netmask: 255.255.255.252
163
164 [[image:image-20220622101433-4.png]]
165
166
167 and then On the PC, use the IP address **http:~/~/172.31.255.254** to access the LPS8-V2 via Web or Console.
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170 [[image:image-20220622102210-5.png||height="569" width="1039"]]
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Xiaoling 69.4 173 Fill in the WiFi information by checking the box and clicking (% style="color:red" %)**Save&Apply**
Xiaoye 35.1 174
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176 [[image:image-20220622102702-6.png]]
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Xiaoling 69.4 179
Xiaoye 35.1 180 **Wi-Fi configuration successful**
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183 [[image:image-20220622102847-7.png]]
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Xiaoling 69.4 185
Xiaoye 35.1 186 [[image:image-20220622102901-8.png||height="513" width="1011"]]
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Xiaoye 26.1 190 == **2.2 The LPS8-V2 is registered and connected to The Things Network** ==
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Xiaoye 41.1 193 === **2.2.1 Select your area frequency** ===
Xiaoye 26.1 194
Xiaoling 69.4 195
Xiaoling 69.12 196 (((
Xiaoye 41.1 197 First, you need to set the frequency plan in LPS8-V2 to match the end node we use, so to receive the LoRaWAN packets from the LoRaWAN sensor.
Xiaoling 69.12 198 )))
Xiaoye 26.1 199
Xiaoye 41.1 200 [[image:image-20220622103332-9.png]]
Xiaoye 26.1 201
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Xiaoling 69.4 203
Xiaoye 41.1 204 === **2.2.2 Get the only gateway EUI** ===
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Xiaoling 69.4 206
Xiaoye 41.1 207 Every LPS8-V2 has a unique gateway id. The ID can be found on LoRaWAN Semtech page:
208
209 [[image:image-20220622103355-10.png]]
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Xiaoling 69.4 212 (% style="color:red" %)**Note: Choose the cluster that corresponds to a specific Gateway server address**
Xiaoye 41.1 213
Xiaoling 69.4 214
Xiaoye 41.1 215 **➢ Europe 1:**  corresponding Gateway server address:  **eu1.cloud.thethings.network**
216
217 **➢ North America 1:**  corresponding Gateway server address:  **nam1.cloud.thethings.network**
218
219 **➢ Australia 1: ** corresponding Gateway server address:  **au1.cloud.thethings.network**
220
221 **➢ Legacy V2 Console:** TTN v2 shuts down in December 2021
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224 [[image:image-20220622103956-12.png]]
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226
227
228 == 2.2.3 Register the gateway to The Things Network ==
229
Xiaoling 69.4 230
Xiaoye 41.1 231 **Login to The Things Network**
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233 [[https:~~/~~/console.cloud.thethings.network/>>https://console.cloud.thethings.network/]]
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Xiaoling 69.4 235
Xiaoye 41.1 236 **Add the gateway**
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238 [[image:image-20220622104252-13.png||height="511" width="953"]]
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241 **Get it online**
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Xiaoling 69.4 244
Kilight Cao 15.1 245 = **3. Web Configure Pages** =
Xiaoye 8.1 246
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Kilight Cao 15.1 248 == **3.1 Home** ==
Kilight Cao 11.1 249
Xiaoling 69.4 250
Kilight Cao 23.1 251 //Shows the system running status~://
Kilight Cao 15.1 252
Xiaoling 69.4 253
Kilight Cao 15.1 254 == **3.2 LoRa Settings** ==
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Kilight Cao 23.1 257 === **3.2.1 LoRa ~-~-> LoRa** ===
Kilight Cao 15.1 258
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Kilight Cao 23.1 260 //This page shows the LoRa Radio Settings. There is a set of default frequency bands according to LoRaWAN protocol, and users can customize the band* as well.//
Kilight Cao 15.1 261
Kilight Cao 23.1 262 //Different LPS8v2 hardware versions can support different frequency ranges~://
Kilight Cao 15.1 263
Xiaoye 83.1 264 * (% style="color:#0000ff" %)//**868**//(% style="color:black" %)//: valid frequency: 863Mhz ~~ 870Mhz. for bands EU868, RU864, IN865, or KZ865.//
Kilight Cao 23.1 265 * (% style="color:#0000ff" %)//**915**//(% style="color:black" %)//: valid frequency: 902Mhz ~~ 928Mhz. for bands US915, AU915, AS923 or KR920//
Xiaoye 8.1 266
Kilight Cao 23.1 267 (% class="wikigeneratedid" %)
Xiaoling 69.4 268 //After the user choose the frequency plan,  the user can see the actual frequency is used by checking the page (% style="color:#037691" %)**LogRead ~-~-> LoRa Log**//
Kilight Cao 23.1 269
270 (% class="wikigeneratedid" %)
271 [[image:image-20220616110739-1.png||height="372" width="682"]]
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Xiaoling 69.4 274 (((
Xiaoling 69.5 275 (% style="color:red" %)//**Note *: See this instruction for how to customize the frequency band: **//(%%)**//__[[How to customized LoRaWAN frequency band - DRAGINO>>url:http://8.211.40.43/xwiki/bin/view/Main/How%20to%20customized%20LoRaWAN%20frequency%20band/]]__//**
Xiaoling 69.4 276 )))
Kilight Cao 23.1 277
278
279
280 == **3.3 LoRaWAN Settings** ==
281
282
283 === **3.3.1 LoRaWAN ~-~-> LoRaWAN Semtech UDP** ===
284
285
286 //This page is for the connection set up to a general LoRaWAN Network server such as [[TTN>>url:http://www.thethingsnetwork.org/]], [[ChirpStack>>url:https://www.chirpstack.io/]], etc.//
287
288 [[image:image-20220616111932-2.png||height="516" width="672"]]
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Xiaoling 69.5 291
Kilight Cao 23.1 292 === **3.3.2 LoRaWAN ~-~-> LoRaWAN Basic Station** ===
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295 //This page is for the connection set up to the TTN Basic Station, AWS-IoT, etc.//
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297 [[image:image-20220616113246-3.png||height="396" width="672"]]
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Xiaoling 69.12 300 (((
Kilight Cao 23.1 301 Please see this instruction to know more detail and a demo for how to use of LoRaWAN Basic Station: __[[Use of LoRaWAN Basic Station - DRAGINO>>url:http://8.211.40.43/xwiki/bin/view/Main/Use%20of%20LoRaWAN%20Basic%20Station/]]__
Xiaoling 69.12 302 )))
Kilight Cao 23.1 303
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Xiaoling 69.5 305
Kilight Cao 23.1 306 == **3.4 Network Settings** ==
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309 === **3.4.1 Network ~-~-> WiFi** ===
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312 [[image:image-20220616114756-4.png||height="251" width="669"]]
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Xiaoling 69.5 315
Kilight Cao 23.1 316 === **3.4.2 Network ~-~-> System Status** ===
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Xiaoye 83.1 319 [[image:image-20220820134112-2.png||height="539" width="668"]]
Kilight Cao 23.1 320
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Xiaoling 69.5 322
Kilight Cao 23.1 323 === **3.4.3 Network ~-~-> Firewall** ===
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326 [[image:image-20220616115351-6.png||height="244" width="661"]]
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Xiaoling 69.5 329
Kilight Cao 23.1 330 == **3.5 System** ==
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333 === **3.5.1  System ~-~-> System Overview** ===
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336 Shows the system info:
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Xiaoling 69.5 339
Kilight Cao 23.1 340 === **3.5.2 System ~-~-> Backup/Restore** ===
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343 [[image:image-20220616115808-7.png||height="194" width="649"]]
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Xiaoye 83.1 347 = **4. Build-in Server** =
Xiaoye 53.1 348
Xiaoye 83.1 349 The default factory version of LPS8-V2 is installed with the built-in Applicant server: (% style="color:blue" %)**Node-Red, and**(%%) LoRaWAN Server: (% style="color:blue" %)**The Things Network - Stack (Open Source 3.19 Version).**
Xiaoye 53.1 350
Xiaoye 83.1 351 [[image:image-20220820115644-1.png]]
Xiaoye 53.1 352
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Xiaoye 83.1 354 Note:
Kilight Cao 58.1 355
Xiaoye 83.1 356 **Path**: System ~-~-> Built-in Server
Kilight Cao 58.1 357
358
Xiaoye 83.1 359 **Troubleshooting:**
Kilight Cao 59.1 360
Xiaoye 60.1 361
Xiaoye 83.1 362 **~ 1. URL does not jump properly**
Xiaoye 60.1 363
Xiaoye 83.1 364 For the ttn-stack, you can click the update the URL which will update the configuration where change the hotsname to the current local IP address as the URL.
Xiaoye 60.1 365
Xiaoye 83.1 366 For the Node-Red, you can use the local IP address and the port is 18880 to access it.
Kilight Cao 57.1 367
368
Xiaoye 83.1 369 == **4.1 LoRaWAN Network  Server ~-~- The Things Network - Stack (TTN-V3)** ==
Kilight Cao 58.1 370
Xiaoye 83.1 371 You can access the gateway's built-in LNS server of **The Things Network - Stack **via the URL( (% style="background-color:yellow" %)__**//http:~/~/<hostname>:8080 or http:~/~/<local-IPV4-address> //**__(%%)) in your browser.
Xiaoling 69.5 372
Xiaoye 83.1 373 Such as  (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
Xiaoye 67.1 374
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Xiaoye 83.1 376 Login account:
Xiaoling 69.5 377
Xiaoye 83.1 378 **User ID: ** ** (% style="background-color:yellow" %)admin(%%)**
Xiaoye 53.1 379
Xiaoye 83.1 380 **Password: ** ** (% style="background-color:yellow" %)dragino(%%)**
Xiaoye 53.1 381
Kilight Cao 59.1 382
Xiaoye 83.1 383 [[image:image-20220725171719-1.png||height="570" width="769"]]
Kilight Cao 59.1 384
385
Xiaoye 60.1 386
Xiaoye 83.1 387 == **4.2. Application Server ~-~- Node-Red** ==
Xiaoling 69.6 388
Xiaoye 53.1 389
Xiaoye 83.1 390 You can access the gateway's built-in AS server of **Node-Red **via the URL((% style="background-color:yellow" %)__**//http:~/~/<hostname>:8080 or http:~/~/<local-IPV4-address>//**__(%%)) in your browser.
Xiaoye 53.1 391
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Xiaoye 83.1 393 Such as (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or [[http:~~/~~/<Local-IPV4-Address~>>>http://<Local-IPV4-Address>]]//**__
Xiaoye 61.1 394
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Xiaoye 83.1 396 [[image:image-20220725172124-3.png||height="610" width="843"]]
Xiaoye 61.1 397
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Kilight Cao 74.1 400 = **6. How users can access LPS8v2 using serial USB** =
Xiaoling 69.6 401
Kilight Cao 74.1 402
Kilight Cao 79.1 403 **USB TTL to LPS8v2  Connection:**
Kilight Cao 74.1 404
405 Port 1 of the UART on the LPS8v2 is GND
406
Kilight Cao 79.1 407 (% class="box infomessage" %)
408 (((
Kilight Cao 74.1 409 TXD  <~-~--> UART RXD (Gray line)
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411 RXD  <~-~--> UART TXD (White line)
412
413 GND <~-~--> GND (Black line)
Kilight Cao 79.1 414 )))
Kilight Cao 74.1 415
416
Kilight Cao 77.1 417 **LPS8v2 UART connection photo**
418
419 [[image:image-20220804163015-1.png||height="621" width="466"]]
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Kilight Cao 78.1 423 In the PC,you can use the serial port tool(such as [[putty>>url:http://www.chiark.greenend.org.uk/~~sgtatham/putty/download.html]] in Windows), you need to set the serial baud rate to (% style="color:blue" %)**115200**(%%) to access the serial console for LPS8v2. LPS8v2 will output system info once power on as below:
Kilight Cao 77.1 424
425 [[image:image-20220804164928-3.png||height="320" width="332"]]
426
427 [[image:image-20220804164747-2.png||height="622" width="594"]]
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Kilight Cao 23.1 429 (% style="color:inherit; font-family:inherit; font-size:29px" %)**10. Supports**
430
Xiaoling 69.6 431
Kilight Cao 14.1 432 (((
433 **//If you are experiencing issues and can't solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
434 )))
Xiaoye 8.1 435
Kilight Cao 14.1 436 (((
437 **//With your question as detailed as possible. We will reply and help you in the shortest.//**
Kilight Cao 15.1 438
Edwin Chen 50.1 439
Xiaoling 69.6 440
Edwin Chen 50.1 441 = **11 Reference** =
442
Xiaoling 69.6 443
Edwin Chen 52.1 444 * Install Tago Core: Refer **Install Tago Core in LPS8v2** in[[ Instruction>>doc:Main.Tago\.IO.WebHome]].
Edwin Chen 80.1 445 * [[Advance OS Reference Guide for LPS8v2>>doc:Main.Armbian OS instruction.WebHome]].
Edwin Chen 50.1 446
Kilight Cao 15.1 447
Kilight Cao 14.1 448 )))
Xiaoye 8.1 449
Edwin Chen 50.1 450 = **12. Order Info** =
Xiaoye 8.1 451
Xiaoling 69.6 452
Edwin Chen 42.1 453 (% style="color:#0000ff" %)**LPS8v2-XXX-YYY**
Xiaoye 8.1 454
Kilight Cao 14.1 455 (% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
Xiaoye 8.1 456
Xiaoling 69.6 457 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
458 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
459 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
460 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
461 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
462 * (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
Xiaoye 8.1 463
Edwin Chen 42.1 464 (% style="color:#0000ff" %)**YYY**(% style="color:black" %): 4G Cellular Option
465
Xiaoling 69.6 466 * (% style="color:red" %)**E**(%%):  EMEA, Korea, Thailand, India.
467 * (% style="color:red" %)**A**(%%):  North America/ Rogers/AT&T/T-Mobile.
468 * (% style="color:red" %)**AU**(%%): Latin America, New Zeland, Taiwan
469 * (% style="color:red" %)**J**(%%):  Japan, DOCOMO/SoftBank/ KDDI
Edwin Chen 42.1 470
471 More info about valid bands, please see [[EC25-E product page>>url:https://www.quectel.com/product/ec25.htm]].
472
473
Xiaoling 69.6 474
Edwin Chen 50.1 475 = **13. Manufacturer Info** =
Xiaoye 8.1 476
Xiaoling 69.6 477
Xiaoye 8.1 478 **Shenzhen Dragino Technology Development co. LTD**
479
480 Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
481
482 LongCheng Street, LongGang District ; Shenzhen 518116,China
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484
Xiaoling 69.6 485
Edwin Chen 50.1 486 = **14. FCC Warning** =
Xiaoye 8.1 487
Xiaoling 69.6 488
Xiaoling 69.12 489 (((
Xiaoye 8.1 490 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Xiaoling 69.12 491 )))
Xiaoye 8.1 492
Xiaoling 69.12 493 (((
Xiaoye 8.1 494 ~-~- Reorient or relocate the receiving antenna.
Xiaoling 69.12 495 )))
Xiaoye 8.1 496
Xiaoling 69.12 497 (((
Xiaoye 8.1 498 ~-~- Increase the separation between the equipment and receiver.
Xiaoling 69.12 499 )))
Xiaoye 8.1 500
Xiaoling 69.12 501 (((
Xiaoye 8.1 502 ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Xiaoling 69.12 503 )))
Xiaoye 8.1 504
Xiaoling 69.12 505 (((
Xiaoye 8.1 506 ~-~- Consult the dealer or an experienced radio/TV technician for help.
Xiaoling 69.12 507 )))
Xiaoye 8.1 508
509
Xiaoling 69.12 510 (((
Xiaoye 8.1 511 Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
Xiaoling 69.12 512 )))
Xiaoye 8.1 513
514
Xiaoling 69.12 515 (((
Xiaoye 8.1 516 The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
517 )))
Xiaoling 69.12 518 )))