Skip to Content
Version 102.1 by Edwin Chen on 2022/11/14 19:41
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20221028134937-1.jpeg||height="466" width="466"]]
3
4 (((
5
6
7
8 )))
9
10 **Table of Contents：**
11
12 {{toc/}}
13
14 = **1. Introduction** =
15
16
17 == **1.1 What is LG01-V2** ==
18
19
20 (((
21 (((
22 The LG01-V2 is an (% style="color:green" %)**open-source single channel LoRa 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.
23 )))
24
25 (((
26 LG01-V2 supports (% style="color:green" %)**remote management**(%%). System Integrator can easy to remote monitor the gateway and maintain it.
27 )))
28
29
30
31 == **1.2 Specifications** ==
32
33
34 (% style="color:#037691" %)**Hardware System:**
35
36 * CPU: Quad-core Cortex-A7 1.2Ghz
37 * RAM: 512MB
38 * eMMC: 4GB
39
40 (% style="color:#037691" %)**Interface:**
41
42 * 10M/100M RJ45 Ports x 1
43 * WiFi 802.11 b/g/n
44
45 (% style="color:#037691" %)**Operating Condition:**
46
47 * Work Temperature: -20 ~~ 65°C
48 * Storage Temperature: -20 ~~ 65°C
49 * Power Input: 5V, 2A, DC
50
51 == **1.3 Features** ==
52
53
54 * Open Source Debian system
55 * Managed by Web GUI, SSH via WAN or WiFi
56 * Remote Management
57 * Auto-provisioning for batch deployment and management
58 * LoRa Gateway
59 * Built-in (% style="color:#037691" %)//**The Things Network**//(%%) local LoRaWAN server
60 * Built-in  (% style="color:#037691" %)//**Node-Red**// (%%)local Application server
61
62 == **1.4 Block Diagram** ==
63
64
65
66 == **1.5 LED Indicators** ==
67
68
69 LG01-V2 has totally four LEDs, They are:
70
71
72 (% style="color:blue" %)//**➢ Power LED**//(%%)//: This RED LED will be solid if the device is properly powered//
73
74 (% style="color:blue" %)//**➢ ETH LED**//(%%)//:  This RGB LED will blink GREEN when the ETH port is connecting//
75
76 (% style="color:blue" %)//**➢ SYS LED**//(%%)//:  This RGB LED will show different colors in different states~://
77
78 // ✓ **SOLID GREEN:** The device is alive with a LoRaWAN server connection.//
79
80 // ✓ **BLINKING GREEN:** a) Device has internet connection but no LoRaWAN Connection. or b) Device is in booting stage, in this stage, it will BLINKING GREEN for several seconds and then with BLINKING GREEN together//
81
82 // ✓** SOLID RED:** Device doesn't have an Internet connection.//
83
84 (% style="color:blue" %)//**➢ WIFI LED**//(%%)//: This LED shows the WIFI interface connection status.//
85
86
87
88 == **1.6 Button Intruction** ==
89
90
91 LG01-V2 has a black toggle button, which is:
92
93
94 (% style="color:blue" %)**//➢ //Long press 4-5s  : **(%%)the gateway will reload the Network and Initialize wifi configuration
95
96 // **LED status: ** ETH LED will BLINKIND BULE Until the reload is finished.//
97
98
99 (% style="color:blue" %)//**➢ **//**Long press more than 10s:**(%%)**    **//the gateway will restore the factory settings.//
100
101 //**LED status: ** ETH LED will SOLID BULE Until the restore is finished.//
102
103
104
105 = **2. Quick Start** =
106
107
108 The LG01-V2 supports network access via Ethernet or Wi-Fi connection and runs without a network.
109
110 In most cases, the first thing you need to do is make the LG01-v2 accessible to the network.
111
112
113 == **2.1 Connects to the network and accesses the gateway Web UI** ==
114
115
116 == **2.1.1 connect the network.** ==
117
118
119 === (% style="color:blue" %)**Method 1**(%%):  Connect via Ethernet with DHCP IP from the router ===
120
121
122 Connect the LG01-V2 Ethernet port to your router and LG01-V2 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 LG01-V2.
123
124 You can also use this IP to connect.
125
126
127 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622100129-1.png?width=1263&height=332&rev=1.1||alt="image-20220622100129-1.png"]]
128
129
130 === (% style="color:blue" %)**Method 2**(%%):  Connect via WiFi with DHCP IP from the router ===
131
132
133 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622100542-2.png?width=1256&height=369&rev=1.1||alt="image-20220622100542-2.png"]]
134
135
136 Fill in the WiFi information by checking the box and clicking (% style="color:red" %)**Save&Apply**
137
138
139 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622102702-6.png?rev=1.1||alt="image-20220622102702-6.png"]]
140
141
142 **Wi-Fi configuration successful**
143
144
145 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622102847-7.png?rev=1.1||alt="image-20220622102847-7.png"]]
146
147
148
149 = **3. Web Configure Pages** =
150
151 == **3.1 Home** ==
152
153 //Shows the system running status~://
154
155 [[image:image-20221104155612-1.png||height="497" width="942"]]
156
157
158 == **3.2 Network Settings** ==
159
160
161 === **3.2.1 Network ~-~-> WiFi** ===
162
163
164 [[image:image-20221104155654-2.png||height="319" width="813"]]
165
166
167
168 === **3.4.2 Network ~-~-> System Status** ===
169
170
171 [[image:image-20221104155724-3.png||height="679" width="861"]]
172
173
174
175 === **3.4.3 Network ~-~-> Firewall** ===
176
177
178 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220616115351-6.png?width=661&height=244&rev=1.1||alt="image-20220616115351-6.png"]]
179
180
181
182 == **3.5 System** ==
183
184
185 === **3.5.1  System ~-~-> System Overview** ===
186
187
188 Shows the system info:
189
190 [[image:image-20221104155907-4.png]]
191
192
193
194 === **3.5.2 System ~-~-> Backup/Restore** ===
195
196
197 [[image:image-20221104155928-5.png||height="334" width="880"]]
198
199
200 = (% id="cke_bm_1978S" style="display:none" %)** **(%%)**4. Build in Server** =
201
202
203 The default factory version of LG01-V2 is installed with the built-in Applicant server: (% style="color:blue" %)**Node-Red**
204
205
206 [[image:image-20221104155949-6.png||height="315" width="1023"]]
207
208
209 (% style="color:red" %)**Note:**
210
211 **Path**: System ~-~-> Built-in Server
212
213
214 **Troubleshooting:**
215
216
217 **~ 1. URL does not jump properly**
218
219 For the Node-Red, you can use the local IP address and the port is 1880 to access it.
220
221
222
223 == **4.1 Application Server ~-~- Node-Red** ==
224
225
226 You can access the gateway's built-in AS server of (% style="color:blue" %)**Node-Red **(%%)via the URL((% style="background-color:yellow" %)__**//http:~/~/<hostname>:1880 or http:~/~/<local-IPV4-address>//**__(%%)) in your browser.
227
228
229 Such as (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:1880  or http:~/~/<Local-IPV4-Address>//**__
230
231
232 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220725172124-3.png?width=843&height=610&rev=1.1||alt="image-20220725172124-3.png"]]
233
234
235 = **5. How to configure the Lora Gateway** =
236
237
238 == **5.1 Configure and Debug LoRa wireless of LG01v2** ==
239
240
241 Users can access the Lora configuration page by running the following command, then select the option **''serial port setup"**:
242
243 (% class="box infomessage" %)
244 (((
245 **root@dragino-2406ef:~~# minicom -s**
246 )))
247
248 [[image:image-20221029174637-2.png||height="410" width="524"]]
249
250
251 And then, change the setting:
252
253 (% class="box infomessage" %)
254 (((
255 **Serial Device :** **/dev/ttyUSB0**
256
257 **Bps/Par/Bits : 9600 8N1**
258 )))
259
260
261 (% style="color:red" %)**Note: Enter the corresponding letter to change the configuration, like A,B,C**(%%)
262 (% style="color:red" %)[[image:image-20221029174703-3.png]]
263
264
265 Enter **AT+CFG **in the interface to get the configuration,
266
267
268 (% class="box infomessage" %)
269 (((
270 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency
271 AT+GROUPMOD=0,0  ~-~--> TX and RX group
272 AT+BW=0,0  ~-~--> TX and RX Bandwidth
273 AT+SF=12,12  ~-~--> TX and RX Spreading Factor
274 AT+POWER=14  ~-~--> TX Power Range
275 AT+CRC=1,1  ~-~--> TX and RX CRC Type
276 AT+HEADER=0,0  ~-~--> TX and RX Header Type
277 AT+CR=1,1  ~-~--> TX and RX Coding Rate
278 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
279 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length
280 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public)**
281 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode
282 AT+RXDAFORM=1                              
283 )))
284
285
286 == **5.2 Example: LG01v2** ==
287
288 === **5.2.1 Introduce for the example:** ===
289
290 [[image:image-20221104102736-3.png||height="282" width="723"]]
291
292
293 In this example, there are two devices:
294
295 * **LA66 Shield + UNO + DHT11**: The UNO will get the temperature and humidity and broadcast the value via LoRa protocol.
296 * **LG01v2** : LG01v2 is set to listening the LoRa Channel which LA66 is broadcasting. When LG01v2 get the data from LA66, LG01v2 will plot the data in built-in IoT server.
297
298 === 5.2.2 Set Up LA66 Shield + UNO ===
299
300
301 ==== **Set up LA66 Module** ====
302
303 LA66 Module is loaded with the firmware **[[LA66 Peer-to-Peer firmware>>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/Instruction%20for%20LA66%20Peer%20to%20Peer%20firmware/]] **and user can use AT Command to set up LA66 with below parameters:
304
305 (((
306 (% style="color:red" %)**LA66 Shield as Sender: **
307
308 (% class="box infomessage" %)
309 (((
310 **LA66 Shield configuration:**
311
312 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
313 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
314 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
315 AT+POWER=14  ~-~--> TX Power Range set: 14dBm
316 AT+CRC=1,1  ~-~--> TX and RX CRC Type
317 AT+HEADER=0,0  ~-~--> TX and RX Header Type
318 AT+CR=1,1  ~-~--> TX and RX Coding Rate
319 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
320 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
321 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public)**
322 AT+RXMOD=6,0  ~-~-->  Rx Timeout and Reply mode
323 )))
324 )))
325
326
327 ==== **Set up Arduino UNO** ====
328
329 (% id="cke_bm_1033249S" style="display:none" %)** **(%%)**Hardware Connection**
330
331 (% class="box infomessage" %)
332 (((
333 **The DHT11 sensor connects to the LA66 Shield:**
334
335 **VCC  <~-~--> 3.3V (Red line)**
336 **DATA <~-~--> PIN8 (Purple line)**
337 **GND  <~-~--> GND (White line)**
338 )))
339
340 [[image:image-20221108170731-5.png||height="588" width="441"]]
341
342
343 ===== **1. Open Arduino IDE** =====
344
345 [[image:image-20221108172149-6.png||height="650" width="542"]]
346
347
348 ===== **2. Open project** =====
349
350 Users can download Arduino files from this link: [[attach:Log-Temperature-Sensor-and-send-data-to-Node-red.ino||target="_blank"]]
351
352 Then click Compile and Upload to LA66 Shield,
353
354 [[image:image-20221108172432-7.png]]
355
356
357 ===== **3. Open the Serial Monitor to check the LA66 Shield data** =====
358
359 The UNO will now reads the temperature and humidity data from the sensor and broadcast it via LoRa wireless,
360
361 [[image:image-20221108174840-8.png||height="731" width="671"]]
362
363
364 Sending out data as below.
365
366 [[image:image-20221108175113-9.png||height="556" width="998"]]
367
368
369
370 === 5.2.3 Set Up LG01v2 ===
371
372
373 Configure LG01v2 LoRa channel parameters so it can get data from LA66 Shield
374
375 (% style="color:red; font-weight:bold" %)**LG01v**(% style="color:red" %)**2 as Receiver: (configured as AT+RXMOD=65535,2)**
376
377 (% class="box infomessage" %)
378 (((
379 **LG01-V2 configuration:**
380
381 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
382 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
383 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
384 AT+POWER=14  ~-~--> TX Power Range set: 14dBm
385 AT+CRC=1,1  ~-~--> TX and RX CRC Type
386 AT+HEADER=0,0  ~-~--> TX and RX Header Type
387 AT+CR=1,1  ~-~--> TX and RX Coding Rate
388 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
389 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
390 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public)**
391 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode, RX window always open
392 )))
393
394
395 === 5.2.4 Test result ===
396
397 After the above configuration is complete, users can send test simulation data to check whether the configuration is correct, In LA66 sheild serial console send:(% style="color:red" %)**(AT+SEND=1,hello world,2,3).**
398 )))
399
400 When LG01v2 replies with ACK when it receives a packet sent by LA66 sheild.
401
402 [[image:image-20221108164413-2.png]]
403
404
405 In the real-time log of LG01v2：
406
407 [[image:image-20221108170314-3.png]]
408
409
410 === **5.2.5 Plot data chart in LG01v2** ===
411
412
413 User can plot the temperature and humidity chat via LG01v2 built-in IoT server.
414
415 User can import this example in Node-Red: [[attach:Log-Temperature-Sensor-and-send-data-to-node-red.json||target="_blank"]]
416
417 [[image:image-20221108180334-10.png||height="651" width="1141"]]
418
419
420 The temperature and humidity chart is displayed in the built-in node-red UI
421
422 **Browser input: (% style="background-color:yellow" %)__//http:~/~/<local-IPV4-address>//__(%%)**
423
424 [[image:image-20221108180458-11.png||height="402" width="1137"]]
425
426
427 = (% style="color:inherit; font-family:inherit; font-size:29px" %)**6. How users can access LG01**(%%)**v(% style="color:inherit; font-family:inherit; font-size:29px" %)2 using serial USB(%%)** =
428
429
430 (% style="color:blue" %)**USB TTL to LG01-V2  Connection:**
431
432
433 Port 1 of the UART on the LG01-V2 is GND
434
435 (% class="box infomessage" %)
436 (((
437 **TXD  <~-~--> UART RXD (Gray line)**
438
439 **RXD  <~-~--> UART TXD (White line)**
440
441 **GND <~-~--> GND (Black line)**
442 )))
443
444
445 **LG01-V2 UART connection photo**
446
447 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220804163015-1.png?width=466&height=621&rev=1.1||alt="image-20220804163015-1.png"]]
448
449
450
451 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 LG01v2. LG01v2 will output system info once power on as below:
452
453
454 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220804164928-3.png?width=332&height=320&rev=1.1||alt="image-20220804164928-3.png"]]
455
456 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220804164747-2.png?width=594&height=622&rev=1.1||alt="image-20220804164747-2.png"]]
457
458
459 = **7. FAQ** =
460
461
462 == **7.1 How does LG01-V2 communicate with Lora shield (LoRa.h)** ==
463
464
465 This example describes how to use LG01-V2, LoRa Shield to set up a LoRa network,
466
467 [[image:image-20221103152238-8.png||height="251" width="654"]]
468
469
470 (% style="color:red" %)**Prerequisites: The configurations of LG01-V2 and Lora shield must match**
471
472 **LG01-V2 configuration:**
473
474 (% class="box infomessage" %)
475 (((
476 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
477 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
478 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
479 AT+POWER=14  ~-~--> TX Power Range
480 AT+CRC=1,1  ~-~--> TX and RX CRC Type
481 AT+HEADER=0,0  ~-~--> TX and RX Header Type
482 AT+CR=1,1  ~-~--> TX and RX Coding Rate
483 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
484 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
485 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public), **the corresponding Lora shield syncword is 0x12
486 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode,RX window always open
487 AT+RXDAFORM=1    
488 )))
489
490 **Lora shield configuration:**
491
492 Lora Shield example: [[attach:LoRa_Shield_Sketch_For_MQTT.ino||target="_blank"]] , [[attach:arduino-LoRa-master.zip||target="_blank"]]
493
494 [[image:image-20221101161318-2.png]]
495
496
497 **Test LG01-V2 to receive Lora Shield data:**
498
499 [[image:image-20221101161951-3.png]]
500
501
502 **Test the LG01-V2 to send data:**
503
504 [[image:image-20221101162527-4.png]]
505
506
507 == **7.2 How does LG01-V2 communicate with Heltec LoRa Node** ==
508
509
510 This example describes how to use LG01-V2 and Heltec LoRa Node to set up a LoRa network,
511
512 [[image:image-20221112161111-2.png||height="258" width="692"]]
513
514 (% style="color:red" %)**Prerequisites: The configurations of LG01-V2 and Lora shield must match**
515
516 **LG01-V2 configuration:**
517
518 (% class="box infomessage" %)
519 (((
520 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
521 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
522 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
523 AT+POWER=14  ~-~--> TX Power Range
524 AT+CRC=1,1  ~-~--> TX and RX CRC Type
525 AT+HEADER=0,0  ~-~--> TX and RX Header Type
526 AT+CR=1,1  ~-~--> TX and RX Coding Rate
527 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
528 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
529 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public), **the corresponding Lora shield syncword is 0x12
530 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode,RX window always open
531 AT+RXDAFORM=1  ~-~--> RX data format**（0: Hex ,1: String）**
532 )))
533
534 After we upload the sketch to Heltec LoRa Node, we can see below output from Arduino.
535
536 Lora Shield example: [[attach:LoRa_send_trial.ino||target="_blank"]]
537
538 [[image:image-20221112162733-3.png||height="524" width="927"]]
539
540
541 And we can see the logread of gateway as below, means the packet arrive gateway:
542
543 [[image:image-20221112163119-4.png||height="808" width="560"]]
544
545 = (% style="color:inherit; font-family:inherit; font-size:29px" %)**8. Supports**(%%) =
546
547
548 (((
549 **//If you are experiencing issues and can't solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
550 )))
551
552 (((
553 **//With your question as detailed as possible. We will reply and help you in the shortest.//**
554
555
556
557 = **9. Reference** =
558
559
560 * Install Tago Core: Refer **Install Tago Core in LPS8v2** in[[ Instruction>>doc:Main.Tago\.IO.WebHome]].
561 * [[Advance OS Reference Guide for LPS8v2>>doc:Main.Armbian OS instruction.WebHome]].
562
563
564 )))
565
566 = **10. Order Info** =
567
568
569 (% style="color:#0000ff" %)**LPS8v2-XXX-YYY**
570
571 (% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
572
573 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
574 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
575 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
576 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
577 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
578 * (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
579
580 (% style="color:#0000ff" %)**YYY**(% style="color:black" %): 4G Cellular Option
581
582 * (% style="color:red" %)**E**(%%):  EMEA, Korea, Thailand, India.
583 * (% style="color:red" %)**A**(%%):  North America/ Rogers/AT&T/T-Mobile.
584 * (% style="color:red" %)**AU**(%%): Latin America, New Zeland, Taiwan
585 * (% style="color:red" %)**J**(%%):  Japan, DOCOMO/SoftBank/ KDDI
586
587 More info about valid bands, please see [[EC25-E product page>>url:https://www.quectel.com/product/ec25.htm]].
588
589
590
591 = **10. Manufacturer Info** =
592
593
594 **Shenzhen Dragino Technology Development co. LTD**
595
596 Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
597
598 LongCheng Street, LongGang District ; Shenzhen 518116,China
599
600
601
602 = **11. FCC Warning** =
603
604
605 (((
606 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:
607 )))
608
609 (((
610 ~-~- Reorient or relocate the receiving antenna.
611 )))
612
613 (((
614 ~-~- Increase the separation between the equipment and receiver.
615 )))
616
617 (((
618 ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
619 )))
620
621 (((
622 ~-~- Consult the dealer or an experienced radio/TV technician for help.
623 )))
624
625
626 (((
627 Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
628 )))
629
630
631 (((
632 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.
633
634
635 )))
636
637 ~)~)~)