Last modified by Xiaoye on 2024/09/21 08:44
<
From version < 83.4 >
edited by Xiaoling
on 2022/08/23 10:01
To version < 64.1 >
edited by Xiaoye
on 2022/07/25 19:48
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Title
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1 -LPS8v2 LoRaWAN Indoor Gateway User Manual
1 +LPS8v2 LoRaWAN Indoor Gateway
Author
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1 -XWiki.Xiaoling
1 +XWiki.Xiaoye
Content
... ... @@ -1,9 +2,8 @@
1 -(% style="text-align:center" %)
2 2  [[image:image-20220620202334-2.png||height="467" width="809"]]
3 3  
4 4  
5 5  (((
6 -
5 +**LPS8v2 User Manual**
7 7  
8 8  
9 9  )))
... ... @@ -12,65 +12,44 @@
12 12  
13 13  {{toc/}}
14 14  
15 -
16 -
17 -
18 -
19 19  = **1. Introduction** =
20 20  
21 -
22 22  == **1.1 What is LPS8v2** ==
23 23  
24 -
25 25  (((
26 -(((
27 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.
28 -)))
29 29  
30 -(((
31 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.
32 -)))
33 33  
34 -(((
35 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.
36 -)))
37 37  
38 -(((
39 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.
40 -)))
41 41  
42 -(((
43 43  LPS8v2 supports (% style="color:green" %)**remote management**(%%). System Integrator can easy to remote monitor the gateway and maintain it.
44 -)))
45 45  
46 46  
47 -
48 48  == **1.2 Specifications** ==
49 49  
32 +**Hardware System:**
50 50  
51 -(% style="color:#037691" %)**Hardware System:**
52 -
53 53  * CPU: Quad-core Cortex-A7 1.2Ghz
54 54  * RAM: 512MB
55 55  * eMMC: 4GB
56 56  
57 -(% style="color:#037691" %)**Interface:**
38 +**Interface:**
58 58  
59 59  * 10M/100M RJ45 Ports x 1
60 60  * Multi-Channel LoRaWAN Wireless
61 61  * WiFi 802.11 b/g/n
62 62  
63 -(% style="color:#037691" %)**Operating Condition:**
44 +**Operating Condition:**
64 64  
65 65  * Work Temperature: -20 ~~ 65°C
66 66  * Storage Temperature: -20 ~~ 65°C
67 67  * Power Input: 5V, 2A, DC
68 68  
69 -
70 -
71 71  == **1.3 Features** ==
72 72  
73 -
74 74  * Open Source Debian system
75 75  * Managed by Web GUI, SSH via WAN or WiFi
76 76  * Remote Management
... ... @@ -83,86 +83,73 @@
83 83  ** Semtech UDP Packet Forwarder
84 84  ** LoRaWAN Basic Station
85 85  ** ChirpStack-Gateway-Bridge (MQTT)
86 -* Built-in (% style="color:#037691" %)//**The Things Network**//(%%) local LoRaWAN server
87 -* Built-in  (% style="color:#037691" %)//**Node-Red**// (%%)local Application server
64 +* Built-in //**The Things Network**// local LoRaWAN server
65 +* Built-in  //**Node-Red**// local Application server
88 88  
89 -
90 -
91 91  == **1.4 Block Diagram** ==
92 92  
93 93  
94 -
95 95  == **1.5 LED Indicators** ==
96 96  
97 -
98 98  LPS8-V2 has totally four LEDs, They are:
99 99  
100 100  
101 -(% style="color:blue" %)//**➢ Power LED**//(%%)//: This RED LED will be solid if the device is properly powered//
75 +//**➢ Power LED**: This RED LED will be solid if the device is properly powered//
102 102  
103 -(% style="color:blue" %)//**➢ LoRa LED**//(%%)//: This RGB LED will blink GREEN when the LoRaWAN module starts or transmit a packet//
104 104  
105 -(% style="color:blue" %)//**➢ SYS LED**//(%%)//: This RGB LED will show different colors in different states~://
78 +//**➢ LoRa LED**: This RGB LED will blink GREEN when the LoRaWAN module starts or transmit a packet//
106 106  
107 -// ✓ **SOLID BLUE:** The device is alive with a LoRaWAN server connection.//
108 108  
109 -// ✓ **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//
81 +//**➢ SYS LED**: This RGB LED will show different colors in different states~://
110 110  
111 -// ✓** SOLID RED:** Device doesn't have an Internet connection.//
83 +// ✓ SOLID BLUE: The device is alive with a LoRaWAN server connection.//
112 112  
113 -(% style="color:blue" %)//**➢ ETH LED**//(%%)//: This LED shows the ETH interface connection status.//
85 +// ✓ 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//
114 114  
87 +// ✓ SOLID RED: Device doesn’t have an Internet connection.//
115 115  
116 116  
117 -= **2. Quick Start** =
90 +//**➢ ETH LED**: This LED shows the ETH interface connection status.//
118 118  
119 119  
93 += **2. Quick Start** =
94 +
120 120  The LPS8-V2 supports network access via Ethernet or Wi-Fi connection and runs without a network.
121 121  
122 122  In most cases, the first thing you need to do is make the lps8-v2 accessible to the network.
123 123  
124 124  
125 -
126 126  == **2.1 Connects to the network and accesses the gateway Web UI** ==
127 127  
128 128  
129 129  == **2.1.1 connect the network.** ==
130 130  
105 +=== ===
131 131  
132 -=== (% style="color:blue" %)**Method 1**(%%):  Connect via Ethernet with DHCP IP from the router ===
107 +=== **Method 1**: Connect via Ethernet with DHCP IP from the router ===
133 133  
134 -
135 -(((
136 136  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.
137 -)))
138 138  
139 -(((
140 140  You can also use this IP to connect.
141 -)))
142 142  
143 143  [[image:image-20220622100129-1.png||height="332" width="1263"]]
144 144  
145 145  
116 +=== **Method 2**: Connect via WiFi with DHCP IP from the router ===
146 146  
147 -=== (% style="color:blue" %)**Method 2**(%%):  Connect via WiFi with DHCP IP from the router ===
148 148  
149 -
150 150  [[image:image-20220622100542-2.png||height="369" width="1256"]]
151 151  
152 152  
153 -(((
154 154  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.
155 -)))
156 156  
157 157  
125 +**Steps to connect via fallback IP:**
158 158  
159 -(% style="color:#037691" %)**Steps to connect via fallback IP:**
127 +~1. Connect PC’s Ethernet port to LPS8-V2's WAN port
160 160  
161 -~1. Connect PC's Ethernet port to LPS8-V2's WAN port
162 -
163 163  2. Configure PC's Ethernet port has  IP: 172.31.255.253 and Netmask: 255.255.255.252
164 164  
165 -
166 166  [[image:image-20220622101433-4.png]]
167 167  
168 168  
... ... @@ -172,51 +172,41 @@
172 172  [[image:image-20220622102210-5.png||height="569" width="1039"]]
173 173  
174 174  
175 -Fill in the WiFi information by checking the box and clicking (% style="color:red" %)**Save&Apply**
140 +Fill in the WiFi information by checking the box and clicking **Save&Apply**
176 176  
177 177  
178 178  [[image:image-20220622102702-6.png]]
179 179  
180 180  
181 -
182 182  **Wi-Fi configuration successful**
183 183  
184 184  
185 185  [[image:image-20220622102847-7.png]]
186 186  
187 -
188 188  [[image:image-20220622102901-8.png||height="513" width="1011"]]
189 189  
190 190  
191 191  
155 +
192 192  == **2.2 The LPS8-V2 is registered and connected to The Things Network** ==
193 193  
194 194  
195 195  === **2.2.1 Select your area frequency** ===
196 196  
197 -
198 -(((
199 199  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.
200 200  
201 -
202 -)))
203 -
204 204  [[image:image-20220622103332-9.png]]
205 205  
206 206  
207 -
208 208  === **2.2.2 Get the only gateway EUI** ===
209 209  
210 -
211 211  Every LPS8-V2 has a unique gateway id. The ID can be found on LoRaWAN Semtech page:
212 212  
213 -
214 214  [[image:image-20220622103355-10.png]]
215 215  
216 216  
217 -(% style="color:red" %)**Note: Choose the cluster that corresponds to a specific Gateway server address**
173 +**Note: Choose the cluster that corresponds to a specific Gateway server address**
218 218  
219 -
220 220  **➢ Europe 1:**  corresponding Gateway server address:  **eu1.cloud.thethings.network**
221 221  
222 222  **➢ North America 1:**  corresponding Gateway server address:  **nam1.cloud.thethings.network**
... ... @@ -230,14 +230,12 @@
230 230  
231 231  
232 232  
233 -== **2.2.3 Register the gateway to The Things Network** ==
188 +== 2.2.3 Register the gateway to The Things Network ==
234 234  
235 -
236 236  **Login to The Things Network**
237 237  
238 238  [[https:~~/~~/console.cloud.thethings.network/>>https://console.cloud.thethings.network/]]
239 239  
240 -
241 241  **Add the gateway**
242 242  
243 243  [[image:image-20220622104252-13.png||height="511" width="953"]]
... ... @@ -246,17 +246,13 @@
246 246  **Get it online**
247 247  
248 248  
249 -
250 250  = **3. Web Configure Pages** =
251 251  
252 252  
253 253  == **3.1 Home** ==
254 254  
255 -
256 256  //Shows the system running status~://
257 257  
258 -
259 -
260 260  == **3.2 LoRa Settings** ==
261 261  
262 262  
... ... @@ -267,21 +267,19 @@
267 267  
268 268  //Different LPS8v2 hardware versions can support different frequency ranges~://
269 269  
270 -* (% style="color:#0000ff" %)//**868**//(% style="color:black" %)//: valid frequency: 863Mhz ~~ 870Mhz. for bands EU868, RU864, IN865, or KZ865.//
219 +* (% style="color:#0000ff" %)//**868**//(% style="color:black" %)//: valid frequency: 863Mhz ~~ 870Mhz. for bands EU868, RU864, IN865 or KZ865.//
271 271  * (% style="color:#0000ff" %)//**915**//(% style="color:black" %)//: valid frequency: 902Mhz ~~ 928Mhz. for bands US915, AU915, AS923 or KR920//
272 272  
273 273  (% class="wikigeneratedid" %)
274 -//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**//
223 +//After the user choose the frequency plan,  the user can see the actual frequency is used by checking the page **LogRead ~-~-> LoRa Log**//
275 275  
276 -
277 277  (% class="wikigeneratedid" %)
278 278  [[image:image-20220616110739-1.png||height="372" width="682"]]
279 279  
280 280  
281 -(((
282 -(% 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/]]__//**
283 -)))
229 +//**Note ***: See this instruction for how to customize the frequency band~://
284 284  
231 +//__[[How to customized LoRaWAN frequency band - DRAGINO>>url:http://8.211.40.43/xwiki/bin/view/Main/How%20to%20customized%20LoRaWAN%20frequency%20band/]]__//
285 285  
286 286  
287 287  == **3.3 LoRaWAN Settings** ==
... ... @@ -292,26 +292,20 @@
292 292  
293 293  //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.//
294 294  
295 -
296 296  [[image:image-20220616111932-2.png||height="516" width="672"]]
297 297  
298 298  
299 -
300 300  === **3.3.2 LoRaWAN ~-~-> LoRaWAN Basic Station** ===
301 301  
302 302  
303 303  //This page is for the connection set up to the TTN Basic Station, AWS-IoT, etc.//
304 304  
305 -
306 306  [[image:image-20220616113246-3.png||height="396" width="672"]]
307 307  
308 308  
309 -(((
310 310  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/]]__
311 -)))
312 312  
313 313  
314 -
315 315  == **3.4 Network Settings** ==
316 316  
317 317  
... ... @@ -321,14 +321,12 @@
321 321  [[image:image-20220616114756-4.png||height="251" width="669"]]
322 322  
323 323  
324 -
325 325  === **3.4.2 Network ~-~-> System Status** ===
326 326  
327 327  
328 -[[image:image-20220820134112-2.png||height="539" width="668"]]
268 +[[image:image-20220616115229-5.png||height="548" width="665"]]
329 329  
330 330  
331 -
332 332  === **3.4.3 Network ~-~-> Firewall** ===
333 333  
334 334  
... ... @@ -335,7 +335,6 @@
335 335  [[image:image-20220616115351-6.png||height="244" width="661"]]
336 336  
337 337  
338 -
339 339  == **3.5 System** ==
340 340  
341 341  
... ... @@ -345,7 +345,6 @@
345 345  Shows the system info:
346 346  
347 347  
348 -
349 349  === **3.5.2 System ~-~-> Backup/Restore** ===
350 350  
351 351  
... ... @@ -353,44 +353,22 @@
353 353  
354 354  
355 355  
356 -= **4. Build-in Server** =
293 += **4. Build-in LoRaWAN Network  Server ~-~- The Things Network - Stack (TTN-V3)** =
357 357  
358 358  
359 -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).**
296 +The default factory version of LPS8-V2 is installed with the Built-in LoRaWAN Server: **The Things Network - Stack (Open Source 3.19 Version).**
360 360  
298 +You can access the gateway's built-in LNS server of **The Things Network - Stack **via the URL((% class="mark" %)__**//http:~/~/<hostname>:8080 or http:~/~/<local-IPV4-address> //**__(%%)) in your browser.
361 361  
362 -[[image:image-20220820115644-1.png]]
363 363  
301 +Such as (% class="mark" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
364 364  
365 -(% style="color:red" %)**Note:**
366 366  
367 - **Path**: System ~-~-> Built-in Server
368 -
369 -
370 -**Troubleshooting:**
371 -
372 -
373 -**~ 1. URL does not jump properly**
374 -
375 - 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.
376 -
377 - For the Node-Red, you can use the local IP address and the port is 18880 to access it.
378 -
379 -
380 -
381 -== **4.1 LoRaWAN Network  Server ~-~- The Things Network - Stack (TTN-V3)** ==
382 -
383 -
384 -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.
385 -
386 -Such as  (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
387 -
388 -
389 389  Login account:
390 390  
391 -**User ID: ** ** (% style="background-color:yellow" %)admin(%%)**
306 +**User ID: ** (% class="mark" %)admin
392 392  
393 -**Password: ** ** (% style="background-color:yellow" %)dragino(%%)**
308 +**Password: ** (% class="mark" %)dragino
394 394  
395 395  
396 396  [[image:image-20220725171719-1.png||height="570" width="769"]]
... ... @@ -397,55 +397,37 @@
397 397  
398 398  
399 399  
400 -== **4.2. Application Server ~-~- Node-Red** ==
315 += **5. Build-in Application Server ~-~- Node-Red** =
401 401  
402 402  
403 -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.
318 +The default factory version of LPS8-V2 is installed with the built-in Applicant server: **Node-Red.**
404 404  
320 +You can access the gateway's built-in AS server of **Node-Red **via the URL((% class="mark" %)__**//http:~/~/<hostname>:8080 or http:~/~/<local-IPV4-address> //**__(%%)) in your browser.
405 405  
406 -Such as (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
407 407  
323 +Such as (% class="mark" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
408 408  
409 409  [[image:image-20220725172124-3.png||height="610" width="843"]]
410 410  
411 411  
412 412  
413 -= **6. How users can access LPS8v2 using serial USB** =
329 +**Note:  (% class="mark" %)A portion of the sample devices that were not installed with Node-Red.
330 + You can complete the installation manually with the following command.(%%)**
414 414  
415 415  
416 -**USB TTL to LPS8v2  Connection:**
417 -
418 -Port 1 of the UART on the LPS8v2 is GND
419 -
420 420  (% class="box infomessage" %)
421 421  (((
422 -TXD  <~-~--> UART RXD (Gray line)
335 +(% class="mark" %)cd /tmp && wget  [[http:~~/~~/repo.dragino.com/release/tool/nodered/autoinstall_nodered.sh>>url:http://repo.dragino.com/release/tool/nodered/autoinstall_nodered.sh]]
423 423  
424 -RXD  <~-~--> UART TXD (White line)
425 -
426 -GND <~-~--> GND (Black line)
337 +(% class="mark" %)chmod +x /tmp/autoinstall_nodered.sh && /tmp/autoinstall_nodered.sh
427 427  )))
428 428  
429 429  
430 -**LPS8v2 UART connection photo**
341 +[[image:http://mail.dragino.cc/attachment/downloadex?ri=%2Falimail%2FinternalLinks%2FrefreshToken&o=1&et=normal&ext=png&e=xiaoye%40dragino.cc&f=519294ac-3286-4e3b-8b3d-1f0f07a6fc41&m=1_0%3ADzzzzyR6R3g%24---.OcxECjM0&n=temp4cj.png]][[image:image-20220725194830-1.jpeg||height="418" width="830"]]
431 431  
432 -[[image:image-20220804163015-1.png||height="621" width="466"]]
433 433  
434 -
435 -
436 -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:
437 -
438 -
439 -[[image:image-20220804164928-3.png||height="320" width="332"]]
440 -
441 -
442 -[[image:image-20220804164747-2.png||height="622" width="594"]]
443 -
444 -
445 -
446 446  (% style="color:inherit; font-family:inherit; font-size:29px" %)**10. Supports**
447 447  
448 -
449 449  (((
450 450  **//If you are experiencing issues and can't solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
451 451  )))
... ... @@ -454,46 +454,38 @@
454 454  **//With your question as detailed as possible. We will reply and help you in the shortest.//**
455 455  
456 456  
457 -
458 458  = **11 Reference** =
459 459  
460 -
461 461  * Install Tago Core: Refer **Install Tago Core in LPS8v2** in[[ Instruction>>doc:Main.Tago\.IO.WebHome]].
462 -* [[Advance OS Reference Guide for LPS8v2>>doc:Main.Armbian OS instruction.WebHome]].
463 463  
464 -
465 -
466 466  
467 467  )))
468 468  
469 469  = **12. Order Info** =
470 470  
471 -
472 472  (% style="color:#0000ff" %)**LPS8v2-XXX-YYY**
473 473  
474 474  (% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
475 475  
476 -* (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
477 -* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
478 -* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
479 -* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
480 -* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
481 -* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
367 +* **AS923**: LoRaWAN AS923 band
368 +* **AU915**: LoRaWAN AU915 band
369 +* **EU868**: LoRaWAN EU868 band
370 +* **KR920**: LoRaWAN KR920 band
371 +* **US915**: LoRaWAN US915 band
372 +* **IN865**: LoRaWAN IN865 band
482 482  
483 483  (% style="color:#0000ff" %)**YYY**(% style="color:black" %): 4G Cellular Option
484 484  
485 -* (% style="color:red" %)**E**(%%):  EMEA, Korea, Thailand, India.
486 -* (% style="color:red" %)**A**(%%):  North America/ Rogers/AT&T/T-Mobile.
487 -* (% style="color:red" %)**AU**(%%): Latin America, New Zeland, Taiwan
488 -* (% style="color:red" %)**J**(%%):  Japan, DOCOMO/SoftBank/ KDDI
376 +* ** E**: EMEA, Korea, Thailand, India.
377 +* ** A**: North America/ Rogers/AT&T/T-Mobile.
378 +* ** AU**: Latin America, New Zeland, Taiwan
379 +* ** J**: Japan, DOCOMO/SoftBank/ KDDI
489 489  
490 490  More info about valid bands, please see [[EC25-E product page>>url:https://www.quectel.com/product/ec25.htm]].
491 491  
492 492  
493 -
494 494  = **13. Manufacturer Info** =
495 495  
496 -
497 497  **Shenzhen Dragino Technology Development co. LTD**
498 498  
499 499  Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
... ... @@ -501,39 +501,21 @@
501 501  LongCheng Street, LongGang District ; Shenzhen 518116,China
502 502  
503 503  
504 -
505 505  = **14. FCC Warning** =
506 506  
507 -
508 -(((
509 509  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:
510 -)))
511 511  
512 -(((
513 513  ~-~- Reorient or relocate the receiving antenna.
514 -)))
515 515  
516 -(((
517 517  ~-~- Increase the separation between the equipment and receiver.
518 -)))
519 519  
520 -(((
521 521  ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
522 -)))
523 523  
524 -(((
525 525  ~-~- Consult the dealer or an experienced radio/TV technician for help.
526 -)))
527 527  
528 528  
529 -(((
530 530  Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
531 -)))
532 532  
533 533  
534 -(((
535 535  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.
536 -
537 -
538 538  )))
539 -)))
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