Version 138.1 by Kilight Cao on 2023/01/13 11:41
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1 (% style="text-align:center" %)
2 [[image:image-20220620202334-2.png||height="467" width="809"]]
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5 (((
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9 )))
10
11 **Table of Contents：**
12
13 {{toc/}}
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15
16
17
18
19 = 1. Introduction =
20
21 == 1.1 What is LPS8v2 ==
22
23
24 (((
25 (((
26 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.
27 )))
28
29 (((
30 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.
31 )))
32
33 (((
34 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.
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 LPS8v2 supports (% style="color:green" %)**remote management**(%%). System Integrator can easy to remote monitor the gateway and maintain it.
43 )))
44
45
46 == 1.2 Specifications ==
47
48
49 (% style="color:#037691" %)**Hardware System:**
50
51 * CPU: Quad-core Cortex-A7 1.2Ghz
52 * RAM: 512MB
53 * eMMC: 4GB
54
55 (% style="color:#037691" %)**Interface:**
56
57 * 10M/100M RJ45 Ports x 1
58 * Multi-Channel LoRaWAN Wireless
59 * WiFi 802.11 b/g/n
60
61 (% style="color:#037691" %)**Operating Condition:**
62
63 * Work Temperature: -20 ~~ 65°C
64 * Storage Temperature: -20 ~~ 65°C
65 * Power Input: 5V, 2A, DC
66
67 == 1.3 Features ==
68
69
70 * Open Source Debian system
71 * Managed by Web GUI, SSH via WAN or WiFi
72 * Remote Management
73 * Auto-provisioning for batch deployment and management
74 * LoRaWAN Gateway
75 * 10 programmable parallel demodulation paths
76 * Pre-configured to support different LoRaWAN regional settings.
77 * Allow customizing LoRaWAN regional parameters.
78 * Different kinds of LoRaWAN Connections such as
79 ** Semtech UDP Packet Forwarder
80 ** LoRaWAN Basic Station
81 ** ChirpStack-Gateway-Bridge (MQTT)
82 * Built-in (% style="color:#037691" %)//**The Things Network**//(%%) local LoRaWAN server
83 * Built-in  (% style="color:#037691" %)//**Node-Red**// (%%)local Application server
84
85 == 1.4 Block Diagram ==
86
87
88
89 == 1.5 LED Indicators ==
90
91
92 LPS8-V2 has totally four LEDs, They are:
93
94
95 (% style="color:blue" %)//**➢ Power LED**//(%%)//: This RED LED will be solid if the device is properly powered//
96
97 (% style="color:blue" %)//**➢ ETH LED**//(%%)//:  This RGB LED will blink GREEN when the ETH port is connecting//
98
99 (% style="color:blue" %)//**➢ SYS LED**//(%%)//:  This RGB LED will show different colors in different states~://
100
101 // ✓ **SOLID GREEN:** The device is alive with a LoRaWAN server connection.//
102
103 // ✓ **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//
104
105 // ✓** SOLID RED:** Device doesn't have an Internet connection.//
106
107 (% style="color:blue" %)//**➢ WIFI LED**//(%%)//: This LED shows the WIFI interface connection status.//
108
109
110 == 1.6 Button Intruction ==
111
112
113 LPS8-V2 has a black toggle button, which is:
114
115
116 (% style="color:blue" %)**//➢ //Long press 4-5s  : **(%%)the gateway will reload the Network and Initialize wifi configuration
117
118 // **LED status: ** ETH LED will BLINKIND BULE Until the reload is finished.//
119
120
121 (% style="color:blue" %)//**➢ **//**Long press more than 10s:**(%%)**    **//the gateway will restore the factory settings.//
122
123 //**LED status: ** ETH LED will SOLID BULE Until the restore is finished.//
124
125
126 = 2. Quick Start =
127
128
129 The LPS8-V2 supports network access via Ethernet or Wi-Fi connection and runs without a network.
130
131 In most cases, the first thing you need to do is make the lps8-v2 accessible to the network.
132
133
134 == 2.1 Connects to the network and accesses the gateway Web UI ==
135
136 == 2.1.1 connect the network ==
137
138
139 === (% style="color:blue" %)**Method 1**(%%):  Connect via Ethernet with DHCP IP from the router ===
140
141
142 (((
143 Connect the LPS8-V2 Ethernet port to your router and LPS8-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 LPS8-V2.
144 )))
145
146 (((
147 You can also use this IP to connect.
148 )))
149
150 [[image:image-20220622100129-1.png||height="332" width="1263"]]
151
152
153 === (% style="color:blue" %)**Method 2**(%%):  Connect via LPS8-V2 Fallback IP ===
154
155
156 [[image:image-20230107084650-2.png||height="310" width="839"]]
157
158
159 (% style="color:blue" %)**Steps to connect via fallback IP:**
160
161 ~1. Connect the PC's Ethernet port to LPS8-V2's WAN port
162
163 2. Configure PC's Ethernet port has IP: 172.31.255.253 and Netmask: 255.255.255.252
164
165 As in the below photo:
166
167 [[image:image-20230107085904-4.png||height="443" width="361"]]
168
169 3. In the PC, use IP address 172.31.255.254 to access the LPS8-V2 via Web or Console.
170
171
172 [[image:image-20230111094247-2.png||height="619" width="1250"]]
173
174
175
176 === (% style="color:blue" %)**Method 3**(%%):  Connect via WiFi with DHCP IP from the router ===
177
178
179 [[image:image-20220622100542-2.png||height="369" width="1256"]]
180
181
182 Fill in the WiFi information by checking the box and clicking (% style="color:red" %)**Save&Apply**
183
184
185 [[image:image-20220622102702-6.png]]
186
187
188
189 **Wi-Fi configuration successful**
190
191
192 [[image:image-20220622102847-7.png]]
193
194
195 [[image:image-20220622102901-8.png||height="476" width="938"]]
196
197
198 == 2.1.2 Access Configure Web UI ==
199
200
201 **Web Interface**
202
203 Open a browser on the PC and type the LPS8-V2 ip address (depends on your connect method)
204
205
206 [[(% style="background-color:yellow" %)**//http:~~/~~/IP_ADDRESS //**>>http://IP_ADDRESS]](%%) or (% style="background-color:yellow" %)//**[[http:~~/~~/172.31.255.254>>http://172.31.255.254(]]**//(Fallback IP)
207
208 You will see the login interface of LPS8-V2 as shown below.
209
210 The account details for Web Login are:
211
212 (% style="color:#4f81bd" %)**User Name: root**
213
214 (% style="color:#4f81bd" %)**Password:   dragino**
215
216 [[image:image-20230106153501-1.png||height="367" width="894"]]
217
218
219 == 2.2 The LPS8-V2 is registered and connected to The Things Network ==
220
221 === 2.2.1 Select your area frequency ===
222
223
224 (((
225 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.
226
227
228 )))
229
230 [[image:image-20220622103332-9.png||height="485" width="938"]]
231
232
233 === 2.2.2 Get the only gateway EUI ===
234
235
236 Every LPS8-V2 has a unique gateway id. The ID can be found on LoRaWAN Semtech page:
237
238
239 [[image:image-20220622103355-10.png||height="698" width="949"]]
240
241
242 (% style="color:red" %)**Note: Choose the cluster that corresponds to a specific Gateway server address**
243
244
245 **➢ Europe 1:**  corresponding Gateway server address:  **eu1.cloud.thethings.network**
246
247 **➢ North America 1:**  corresponding Gateway server address:  **nam1.cloud.thethings.network**
248
249 **➢ Australia 1: ** corresponding Gateway server address:  **au1.cloud.thethings.network**
250
251 **➢ Legacy V2 Console:** TTN v2 shuts down in December 2021
252
253
254 [[image:image-20220622103956-12.png]]
255
256
257 == 2.2.3 Register the gateway to The Things Network ==
258
259
260 **Login to The Things Network**
261
262 [[https:~~/~~/console.cloud.thethings.network/>>https://console.cloud.thethings.network/]]
263
264
265 **Add the gateway**
266
267 [[image:image-20220622104252-13.png||height="511" width="953"]]
268
269
270 **Get it online**
271
272
273 = 3. Web Configure Pages =
274
275 == 3.1 Home ==
276
277
278 //Shows the system running status~://
279
280 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622102901-8.png?rev=1.1||alt="image-20220622102901-8.png" height="476" width="939"]]
281
282
283 == 3.2 LoRa Settings ==
284
285 === 3.2.1 LoRa ~-~-> LoRa ===
286
287
288 //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.//
289
290 //Different LPS8v2 hardware versions can support different frequency ranges~://
291
292 * (% style="color:#0000ff" %)//**868**//(% style="color:black" %)//: valid frequency: 863Mhz ~~ 870Mhz. for bands EU868, RU864, IN865, or KZ865.//
293 * (% style="color:#0000ff" %)//**915**//(% style="color:black" %)//: valid frequency: 902Mhz ~~ 928Mhz. for bands US915, AU915, AS923 or KR920//
294
295 (% class="wikigeneratedid" %)
296 //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**//
297
298
299 (% class="wikigeneratedid" %)
300 [[image:image-20220616110739-1.png||height="372" width="682"]]
301
302
303 (((
304 (% style="color:red" %)//**Note *: See this instruction for how to customize the frequency band: **//(%%)**//__[[How to customized LoRaWAN frequency band - DRAGINO>>doc:Main.How to customized LoRaWAN frequency band.WebHome]]__//**
305 )))
306
307
308 == 3.3 LoRaWAN Settings ==
309
310 === 3.3.1 LoRaWAN ~-~-> LoRaWAN Semtech UDP ===
311
312
313 //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.//
314
315
316 [[image:image-20220616111932-2.png||height="516" width="672"]]
317
318
319 === 3.3.2 LoRaWAN ~-~-> LoRaWAN Basic Station ===
320
321
322 //This page is for the connection set up to the TTN Basic Station, AWS-IoT, etc.//
323
324
325 [[image:image-20220616113246-3.png||height="396" width="672"]]
326
327
328 (((
329 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>>doc:Main.Use of LoRaWAN Basic Station.WebHome]]__
330 )))
331
332
333 == 3.4 Network Settings ==
334
335 === 3.4.1 Network ~-~-> WiFi ===
336
337
338 [[image:image-20220616114756-4.png||height="251" width="669"]]
339
340
341 === 3.4.2 Network ~-~-> System Status ===
342
343
344 [[image:image-20220820134112-2.png||height="539" width="668"]]
345
346
347 === 3.4.3 Network ~-~-> Firewall ===
348
349
350 [[image:image-20220616115351-6.png||height="244" width="661"]]
351
352
353 == 3.5 System ==
354
355 === 3.5.1 System ~-~-> System Overview ===
356
357
358 Shows the system info:
359
360 [[image:image-20220917144512-5.png||height="618" width="853"]]
361
362
363 === 3.5.2 System ~-~-> System General ===
364
365
366 In the System-> System General interface, Users can customize the configuration System Password and set Timezone.
367
368 [[image:image-20230107084158-1.png||height="543" width="844"]]
369
370
371 === 3.5.3 System ~-~-> Backup/Restore ===
372
373
374 [[image:image-20220917144725-6.png||height="208" width="869"]]
375
376
377 === 3.5.4 System ~-~-> Remoteit ===
378
379
380 In the System-> Remoteit interface, users can configure the gateway to be accessed remotely via Remote.it.
381
382
383 the users can refer to this link to configure them: **[[Monitor & Remote Access Gateway>>http://wiki.dragino.com/xwiki/bin/view/Main/Monitor%20%26%20Remote%20Access%20Gateway/?Remote%20Access#H2.1A0RemoteAccessviaRemote.it.]]**
384
385 [[image:image-20221230092303-2.png]]
386
387
388 = 4. Build-in Server =
389
390
391 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).**
392
393
394 [[image:image-20220820115644-1.png||height="217" width="778"]]
395
396
397 (% style="color:red" %)**Note:**
398
399 **Path**: System ~-~-> Built-in Server
400
401
402 **Troubleshooting:**
403
404
405 **~ 1. URL does not jump properly**
406
407 For the ttn-stack, you can click the update the URL which will update the configuration where change the hostname to the current local IP address as the URL.
408
409 For the Node-Red, you can use the local IP address and the port is 1880 to access it.
410
411
412 == 4.1 LoRaWAN Network  Server ~-~- The Things Network - Stack (TTN-V3) ==
413
414
415 You can access the gateway's built-in LNS server of (% style="color:blue" %)**The Things Network - Stack **(%%)via the URL( (% style="background-color:yellow" %)__**//http:~/~/<hostname>:8080 or http:~/~/<local-IPV4-address> //**__(%%)) in your browser.
416
417 Such as  (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:8080  or http:~/~/<Local-IPV4-Address>//**__
418
419
420 Login account:
421
422 **User ID: ** ** (% style="background-color:yellow" %)admin(%%)**
423
424 **Password: ** ** (% style="background-color:yellow" %)dragino(%%)**
425
426
427 [[image:image-20220725171719-1.png||height="570" width="769"]]
428
429
430 == 4.2 Application Server ~-~- Node-Red ==
431
432
433 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.
434
435
436 Such as (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:1880  or http:~/~/<Local-IPV4-Address>//**__
437
438
439 [[image:image-20220725172124-3.png||height="610" width="843"]]
440
441
442
443 === **Using Node-Red, InfluxDB and Grafana** ===
444
445 The LPS8-V2 supports this combination, the default, Node-red is pre-installed but the InfluxDB and Grafana is not pre-installed.
446
447
448 the users can refer to this link to install them.
449
450 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Armbian%20OS%20instruction/#H2.6HowtoinstallGrafanaandinfluxdb>>http://wiki.dragino.com/xwiki/bin/view/Main/Armbian%20OS%20instruction/#H2.6HowtoinstallGrafanaandinfluxdb]]
451
452 == 4.3 How to disable the built-in server ==
453
454
455 Use the following commands to start and stop the TTNv3 service:
456
457 (% class="box infomessage" %)
458 (((
459 **# start**
460 systemctl start ttnstack
461
462 **# stop**
463 systemctl stop ttnstack
464
465 **# enable**
466 systemctl enable ttnstack
467
468 **#disable**
469 systemctl disable ttnstack
470 )))
471
472 Use the following commands to start and stop the Node-Red service:
473
474 (% class="box infomessage" %)
475 (((
476 **# start**
477 systemctl start nodered
478
479 **# stop**
480 systemctl stop nodered
481
482 **# enable**
483 systemctl enable nodered
484
485 **#disable**
486 systemctl disable nodered
487 )))
488
489 == 4.4 How to use ChirpStack on LPS8V2 ==
490
491
492 By default, the built-in LoRaWAN network server used on LPS8v2 is TTNv3, so users need to disable TTNv3 services and follow this link to install chirpstack:
493
494
495 = 5. How users can access LPS8v2 using serial USB =
496
497
498 (% style="color:blue" %)**USB TTL to LPS8v2  Connection:**
499
500
501 Port 1 of the UART on the LPS8v2 is GND
502
503 (% class="box infomessage" %)
504 (((
505 **TXD  <~-~--> UART RXD (Gray line)**
506
507 **RXD  <~-~--> UART TXD (White line)**
508
509 **GND <~-~--> GND (Black line)**
510 )))
511
512
513 **LPS8v2 UART connection photo**
514
515 [[image:image-20220804163015-1.png||height="621" width="466"]]
516
517
518 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:
519
520
521 [[image:image-20220804164928-3.png||height="320" width="332"]]
522
523
524 [[image:image-20220804164747-2.png||height="622" width="594"]]
525
526
527 = 6. Use the helium gateway-rs as the Data-only Hotspot =
528
529
530 == **Step 1: Configure Frequency Band** ==
531
532
533 //Each country has a requirement for frequency region. Choose the right one for your area.//
534
535 [[image:image-20220905164308-1.png]]
536
537
538
539 == **Step 2: Configure the forward address** ==
540
541
542 **Select one of the servers to configure.**
543
544 **For example:**
545
546 [[image:image-20220905164847-2.png]]
547
548
549
550 == **Step 3: Download and Install the Helium-gateway-rs** ==
551
552
553 **Access the gateway CLI via SSH.**
554
555 [[image:image-20220905165222-3.png]]
556
557
558 **Download gateway-rs.**
559
560 [[image:image-20220905165715-5.png]]
561
562 (% class="box infomessage" %)
563 (((
564 **Command: wget [[http:~~/~~/repo.dragino.com/release/tool/gateway-rs/helium-gateway-v1.0.0-alpha.31-raspi234.deb>>http://repo.dragino.com/release/tool/gateway-rs/helium-gateway-v1.0.0-alpha.31-raspi234.deb]]**
565 )))
566
567
568 **Install gateway-rs.**
569
570 [[image:image-20220905165917-7.png]]
571
572 (% class="box infomessage" %)
573 (((
574 **Command: dpkg -i helium-gateway-v1.0.0-alpha.31-raspi234.deb **
575 )))
576
577
578 **Modify configuration.**
579
580
581 [[image:image-20220905173847-12.png]]
582
583
584 (% class="box infomessage" %)
585 (((
586 **region=<Enter regional parameters> \
587 && sed -i '/region/d' /etc/helium_gateway/settings.toml && sed -i "1 i\region = \"$region\"" /etc/helium_gateway/settings.toml \
588 && sed -i '/region/d' /etc/helium_gateway/default.toml && sed -i "22 i\region = \"$region\"" /etc/helium_gateway/default.toml**
589 )))
590
591
592 **Restart the helium_gateway**
593
594 [[image:image-20220905170920-9.png]]
595
596
597 (% class="box infomessage" %)
598 (((
599 **systemctl restart helium_gateway**
600 )))
601
602
603 **Check the helium_gateway Log：**
604
605 [[image:image-20220905173952-13.png]]
606
607
608 (% class="box infomessage" %)
609 (((
610 **journalctl -u helium_gateway -f**
611 )))
612
613
614 (% style="color:red" %)**Note: if your device is not finished the onboarding, which is unable to connect to the Helium console.**
615
616 where the helium gateway log is shown:
617
618 [[image:image-20220905174534-14.png]]
619
620
621 So you have to finish the onboarding, ~-~--Please refer to [[Step 2.7>>doc:Main.Notes for Helium.WebHome||anchor="H2.7A0Step6:OnboardingData-OnlyHotspot"]] to onboarding your LPS8-V2.
622
623
624 = 7. OTA System Update =
625
626
627 LPS8v2 supports system auto update via OTA, please see **[[this URL>>url:http://wiki.dragino.com/xwiki/bin/view/OTA%20Update/]]** for the detail of this feature.
628
629
630 = 8. Trouble Shooting =
631
632 == 8.1  I can't log in to the built-in Server TTN Stack which shows '**Login failed**'. ==
633
634
635 [[image:image-20220920135918-1.png]]
636
637
638 This is caused by the inconsistency between the built-in TTN-Stack domain configuration and your login URL.
639
640 By default, ttn-stack uses the gateway's domain name for URL resolution, but in some networks, they prefer to resolve IP-v4 addresses.
641
642
643 So you can change the domain name of the TTN-Stack configuration to the IPv4 address.
644
645 **Click the update URL button to configure the URL with the current eth port address.**
646
647 [[image:image-20220920141936-2.png]]
648
649
650 = (% style="color:inherit; font-family:inherit; font-size:29px" %)9. Supports(%%) =
651
652
653 (((
654 **//If you are experiencing issues and can't solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
655 )))
656
657 (((
658 **//With your question as detailed as possible. We will reply and help you in the shortest.//**
659
660
661 = 10. Reference =
662
663
664 * Install Tago Core: Refer **Install Tago Core in LPS8v2** in[[ Instruction>>doc:Main.Tago\.IO.WebHome]].
665 * [[Advance OS Reference Guide for LPS8v2>>doc:Main.Armbian OS instruction.WebHome]].
666
667
668 )))
669
670 = 11. Order Info =
671
672
673 (% style="color:#0000ff" %)**LPS8v2-XXX-YYY**
674
675 (% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
676
677 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
678 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
679 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
680 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
681 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
682 * (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
683
684 (% style="color:#0000ff" %)**YYY**(% style="color:black" %): 4G Cellular Option
685
686 * (% style="color:red" %)**E**(%%):  EMEA, Korea, Thailand, India.
687 * (% style="color:red" %)**A**(%%):  North America/ Rogers/AT&T/T-Mobile.
688 * (% style="color:red" %)**AU**(%%): Latin America, New Zeland, Taiwan
689 * (% style="color:red" %)**J**(%%):  Japan, DOCOMO/SoftBank/ KDDI
690
691 More info about valid bands, please see [[EC25-E product page>>url:https://www.quectel.com/product/ec25.htm]].
692
693
694 = 12. Manufacturer Info =
695
696
697 **Shenzhen Dragino Technology Development co. LTD**
698
699 Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
700
701 LongCheng Street, LongGang District ; Shenzhen 518116,China
702
703
704 = 13. FCC Warning =
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707 (((
708 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:
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712 ~-~- Reorient or relocate the receiving antenna.
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716 ~-~- Increase the separation between the equipment and receiver.
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719 (((
720 ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
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723 (((
724 ~-~- Consult the dealer or an experienced radio/TV technician for help.
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729 Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
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733 (((
734 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.
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738 )))

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