Last modified by Xiaoye on 2024/09/21 08:44
<
From version < 83.2 >
edited by Xiaoling
on 2022/08/23 09:16
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  )))
... ... @@ -12,66 +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 -
72 72  == **1.3 Features** ==
73 73  
74 -
75 75  * Open Source Debian system
76 76  * Managed by Web GUI, SSH via WAN or WiFi
77 77  * Remote Management
... ... @@ -84,81 +84,71 @@
84 84  ** Semtech UDP Packet Forwarder
85 85  ** LoRaWAN Basic Station
86 86  ** ChirpStack-Gateway-Bridge (MQTT)
87 -* Built-in (% style="color:#037691" %)//**The Things Network**//(%%) local LoRaWAN server
88 -* 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
89 89  
90 90  == **1.4 Block Diagram** ==
91 91  
92 92  
93 -
94 94  == **1.5 LED Indicators** ==
95 95  
96 -
97 97  LPS8-V2 has totally four LEDs, They are:
98 98  
99 99  
100 -(% 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//
101 101  
102 -(% style="color:blue" %)//**➢ LoRa LED**//(%%)//: This RGB LED will blink GREEN when the LoRaWAN module starts or transmit a packet//
103 103  
104 -(% 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//
105 105  
106 -// ✓ **SOLID BLUE:** The device is alive with a LoRaWAN server connection.//
107 107  
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//
81 +//**➢ SYS LED**: This RGB LED will show different colors in different states~://
109 109  
110 -// ✓** SOLID RED:** Device doesn't have an Internet connection.//
83 +// ✓ SOLID BLUE: The device is alive with a LoRaWAN server connection.//
111 111  
112 -(% 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//
113 113  
87 +// ✓ SOLID RED: Device doesn’t have an Internet connection.//
114 114  
115 115  
116 -= **2. Quick Start** =
90 +//**➢ ETH LED**: This LED shows the ETH interface connection status.//
117 117  
118 118  
93 += **2. Quick Start** =
94 +
119 119  The LPS8-V2 supports network access via Ethernet or Wi-Fi connection and runs without a network.
120 120  
121 121  In most cases, the first thing you need to do is make the lps8-v2 accessible to the network.
122 122  
123 123  
124 -
125 125  == **2.1 Connects to the network and accesses the gateway Web UI** ==
126 126  
127 127  
128 128  == **2.1.1 connect the network.** ==
129 129  
105 +=== ===
130 130  
131 -=== (% 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 ===
132 132  
133 -
134 -(((
135 135  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.
136 -)))
137 137  
138 -(((
139 139  You can also use this IP to connect.
140 -)))
141 141  
142 142  [[image:image-20220622100129-1.png||height="332" width="1263"]]
143 143  
144 144  
116 +=== **Method 2**: Connect via WiFi with DHCP IP from the router ===
145 145  
146 -=== (% style="color:blue" %)**Method 2**(%%):  Connect via WiFi with DHCP IP from the router ===
147 147  
148 -
149 149  [[image:image-20220622100542-2.png||height="369" width="1256"]]
150 150  
151 151  
152 -(((
153 153  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.
154 -)))
155 155  
156 156  
125 +**Steps to connect via fallback IP:**
157 157  
158 -(% style="color:#037691" %)**Steps to connect via fallback IP:**
127 +~1. Connect PC’s Ethernet port to LPS8-V2's WAN port
159 159  
160 -~1. Connect PC's Ethernet port to LPS8-V2's WAN port
161 -
162 162  2. Configure PC's Ethernet port has  IP: 172.31.255.253 and Netmask: 255.255.255.252
163 163  
164 164  [[image:image-20220622101433-4.png]]
... ... @@ -170,48 +170,41 @@
170 170  [[image:image-20220622102210-5.png||height="569" width="1039"]]
171 171  
172 172  
173 -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**
174 174  
175 175  
176 176  [[image:image-20220622102702-6.png]]
177 177  
178 178  
179 -
180 180  **Wi-Fi configuration successful**
181 181  
182 182  
183 183  [[image:image-20220622102847-7.png]]
184 184  
185 -
186 186  [[image:image-20220622102901-8.png||height="513" width="1011"]]
187 187  
188 188  
189 189  
155 +
190 190  == **2.2 The LPS8-V2 is registered and connected to The Things Network** ==
191 191  
192 192  
193 193  === **2.2.1 Select your area frequency** ===
194 194  
195 -
196 -(((
197 197  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.
198 -)))
199 199  
200 200  [[image:image-20220622103332-9.png]]
201 201  
202 202  
203 -
204 204  === **2.2.2 Get the only gateway EUI** ===
205 205  
206 -
207 207  Every LPS8-V2 has a unique gateway id. The ID can be found on LoRaWAN Semtech page:
208 208  
209 209  [[image:image-20220622103355-10.png]]
210 210  
211 211  
212 -(% 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**
213 213  
214 -
215 215  **➢ Europe 1:**  corresponding Gateway server address:  **eu1.cloud.thethings.network**
216 216  
217 217  **➢ North America 1:**  corresponding Gateway server address:  **nam1.cloud.thethings.network**
... ... @@ -227,12 +227,10 @@
227 227  
228 228  == 2.2.3 Register the gateway to The Things Network ==
229 229  
230 -
231 231  **Login to The Things Network**
232 232  
233 233  [[https:~~/~~/console.cloud.thethings.network/>>https://console.cloud.thethings.network/]]
234 234  
235 -
236 236  **Add the gateway**
237 237  
238 238  [[image:image-20220622104252-13.png||height="511" width="953"]]
... ... @@ -241,16 +241,13 @@
241 241  **Get it online**
242 242  
243 243  
244 -
245 245  = **3. Web Configure Pages** =
246 246  
247 247  
248 248  == **3.1 Home** ==
249 249  
250 -
251 251  //Shows the system running status~://
252 252  
253 -
254 254  == **3.2 LoRa Settings** ==
255 255  
256 256  
... ... @@ -261,20 +261,19 @@
261 261  
262 262  //Different LPS8v2 hardware versions can support different frequency ranges~://
263 263  
264 -* (% 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.//
265 265  * (% style="color:#0000ff" %)//**915**//(% style="color:black" %)//: valid frequency: 902Mhz ~~ 928Mhz. for bands US915, AU915, AS923 or KR920//
266 266  
267 267  (% class="wikigeneratedid" %)
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**//
223 +//After the user choose the frequency plan,  the user can see the actual frequency is used by checking the page **LogRead ~-~-> LoRa Log**//
269 269  
270 270  (% class="wikigeneratedid" %)
271 271  [[image:image-20220616110739-1.png||height="372" width="682"]]
272 272  
273 273  
274 -(((
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/]]__//**
276 -)))
229 +//**Note ***: See this instruction for how to customize the frequency band~://
277 277  
231 +//__[[How to customized LoRaWAN frequency band - DRAGINO>>url:http://8.211.40.43/xwiki/bin/view/Main/How%20to%20customized%20LoRaWAN%20frequency%20band/]]__//
278 278  
279 279  
280 280  == **3.3 LoRaWAN Settings** ==
... ... @@ -288,7 +288,6 @@
288 288  [[image:image-20220616111932-2.png||height="516" width="672"]]
289 289  
290 290  
291 -
292 292  === **3.3.2 LoRaWAN ~-~-> LoRaWAN Basic Station** ===
293 293  
294 294  
... ... @@ -297,12 +297,9 @@
297 297  [[image:image-20220616113246-3.png||height="396" width="672"]]
298 298  
299 299  
300 -(((
301 301  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/]]__
302 -)))
303 303  
304 304  
305 -
306 306  == **3.4 Network Settings** ==
307 307  
308 308  
... ... @@ -312,14 +312,12 @@
312 312  [[image:image-20220616114756-4.png||height="251" width="669"]]
313 313  
314 314  
315 -
316 316  === **3.4.2 Network ~-~-> System Status** ===
317 317  
318 318  
319 -[[image:image-20220820134112-2.png||height="539" width="668"]]
268 +[[image:image-20220616115229-5.png||height="548" width="665"]]
320 320  
321 321  
322 -
323 323  === **3.4.3 Network ~-~-> Firewall** ===
324 324  
325 325  
... ... @@ -326,7 +326,6 @@
326 326  [[image:image-20220616115351-6.png||height="244" width="661"]]
327 327  
328 328  
329 -
330 330  == **3.5 System** ==
331 331  
332 332  
... ... @@ -336,7 +336,6 @@
336 336  Shows the system info:
337 337  
338 338  
339 -
340 340  === **3.5.2 System ~-~-> Backup/Restore** ===
341 341  
342 342  
... ... @@ -344,40 +344,22 @@
344 344  
345 345  
346 346  
347 -= **4. Build-in Server** =
293 += **4. Build-in LoRaWAN Network  Server ~-~- The Things Network - Stack (TTN-V3)** =
348 348  
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).**
350 350  
351 -[[image:image-20220820115644-1.png]]
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).**
352 352  
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.
353 353  
354 -Note:
355 355  
356 - **Path**: System ~-~-> Built-in Server
301 +Such as (% class="mark" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
357 357  
358 358  
359 -**Troubleshooting:**
360 -
361 -
362 -**~ 1. URL does not jump properly**
363 -
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.
365 -
366 - For the Node-Red, you can use the local IP address and the port is 18880 to access it.
367 -
368 -
369 -== **4.1 LoRaWAN Network  Server ~-~- The Things Network - Stack (TTN-V3)** ==
370 -
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.
372 -
373 -Such as  (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
374 -
375 -
376 376  Login account:
377 377  
378 -**User ID: ** ** (% style="background-color:yellow" %)admin(%%)**
306 +**User ID: ** (% class="mark" %)admin
379 379  
380 -**Password: ** ** (% style="background-color:yellow" %)dragino(%%)**
308 +**Password: ** (% class="mark" %)dragino
381 381  
382 382  
383 383  [[image:image-20220725171719-1.png||height="570" width="769"]]
... ... @@ -384,51 +384,37 @@
384 384  
385 385  
386 386  
387 -== **4.2. Application Server ~-~- Node-Red** ==
315 += **5. Build-in Application Server ~-~- Node-Red** =
388 388  
389 389  
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.
318 +The default factory version of LPS8-V2 is installed with the built-in Applicant server: **Node-Red.**
391 391  
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.
392 392  
393 -Such as (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or [[http:~~/~~/<Local-IPV4-Address~>>>http://<Local-IPV4-Address>]]//**__
394 394  
323 +Such as (% class="mark" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
395 395  
396 396  [[image:image-20220725172124-3.png||height="610" width="843"]]
397 397  
398 398  
399 399  
400 -= **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.(%%)**
401 401  
402 402  
403 -**USB TTL to LPS8v2  Connection:**
404 -
405 -Port 1 of the UART on the LPS8v2 is GND
406 -
407 407  (% class="box infomessage" %)
408 408  (((
409 -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]]
410 410  
411 -RXD  <~-~--> UART TXD (White line)
412 -
413 -GND <~-~--> GND (Black line)
337 +(% class="mark" %)chmod +x /tmp/autoinstall_nodered.sh && /tmp/autoinstall_nodered.sh
414 414  )))
415 415  
416 416  
417 -**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"]]
418 418  
419 -[[image:image-20220804163015-1.png||height="621" width="466"]]
420 420  
421 -
422 -
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:
424 -
425 -[[image:image-20220804164928-3.png||height="320" width="332"]]
426 -
427 -[[image:image-20220804164747-2.png||height="622" width="594"]]
428 -
429 429  (% style="color:inherit; font-family:inherit; font-size:29px" %)**10. Supports**
430 430  
431 -
432 432  (((
433 433  **//If you are experiencing issues and can't solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
434 434  )))
... ... @@ -437,12 +437,9 @@
437 437  **//With your question as detailed as possible. We will reply and help you in the shortest.//**
438 438  
439 439  
440 -
441 441  = **11 Reference** =
442 442  
443 -
444 444  * Install Tago Core: Refer **Install Tago Core in LPS8v2** in[[ Instruction>>doc:Main.Tago\.IO.WebHome]].
445 -* [[Advance OS Reference Guide for LPS8v2>>doc:Main.Armbian OS instruction.WebHome]].
446 446  
447 447  
448 448  )))
... ... @@ -449,32 +449,29 @@
449 449  
450 450  = **12. Order Info** =
451 451  
452 -
453 453  (% style="color:#0000ff" %)**LPS8v2-XXX-YYY**
454 454  
455 455  (% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
456 456  
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
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
463 463  
464 464  (% style="color:#0000ff" %)**YYY**(% style="color:black" %): 4G Cellular Option
465 465  
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
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
470 470  
471 471  More info about valid bands, please see [[EC25-E product page>>url:https://www.quectel.com/product/ec25.htm]].
472 472  
473 473  
474 -
475 475  = **13. Manufacturer Info** =
476 476  
477 -
478 478  **Shenzhen Dragino Technology Development co. LTD**
479 479  
480 480  Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
... ... @@ -482,37 +482,21 @@
482 482  LongCheng Street, LongGang District ; Shenzhen 518116,China
483 483  
484 484  
485 -
486 486  = **14. FCC Warning** =
487 487  
488 -
489 -(((
490 490  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:
491 -)))
492 492  
493 -(((
494 494  ~-~- Reorient or relocate the receiving antenna.
495 -)))
496 496  
497 -(((
498 498  ~-~- Increase the separation between the equipment and receiver.
499 -)))
500 500  
501 -(((
502 502  ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
503 -)))
504 504  
505 -(((
506 506  ~-~- Consult the dealer or an experienced radio/TV technician for help.
507 -)))
508 508  
509 509  
510 -(((
511 511  Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
512 -)))
513 513  
514 514  
515 -(((
516 516  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.
517 517  )))
518 -)))
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