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Wireless Knowledge Center > Wireless System Setup Drawings |
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Sample System Setup Drawings |
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Cellular Amplifiers, High Gain Antennas & Cellular 3G Routers |
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Lighting surge suppression devices critical if mounting antenna in roof. Appropriate lightning device properly grounded in accordance with NEC or other applicable local regulations STRONGLY recommended more on lightning devices |
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Careful installation required to prevent oscillations caused by co-channel interference between outdoor antenna and indoor antenna. Observer minimum separation distances. Too much gain just as bad as too little. If gain too strong consider using attenuators to lower the gain. |
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Amplifier re-radiates boosted signal up to a maximum area. Consider carefully distance between cellular device and internal dome antenna. |
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Carefully consider total link budget (i.e how much signal strength you need vs how much is lost in cables/connectors) from outside antenna to mobile device. |
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Need information on what frequency band your carrier is operating on in your geographic area if getting single band amplifiers. |
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Not all amplifiers or cellular routers are created equal!!! |
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Brief Description |
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E-Store Bundle |
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Simple Omni-Directional Antenna Connected to USB Modem
Also includes a Cellular 3G router and lightning protection. Note that coaxial cable run from roof to modem is 75ft so need high quality (low-loss) cable such as the LMR-400 cable shown but even with this the attenuation is 4.4dB. Therefore need a powerful antenna such as the 9dBi shown to make up for the cable losses. Preferably a higher gain directional Yagi antenna should be used instead but will require orientation to directional of maximum received signal strength. |
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Cellular direct-connect In-Building Amplifier, outdoor omni-directional antenna |
| Improve in-building cellular coverage. System includes: |
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Outdor antenna is omni-directional: |
Useful when you don't know direction of maximum received signal strength or don't want to orient outdoor antenna. Receives signal from all directions. |
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Outdoor antenna is also dual-band: |
work with both 800 & 1900MHz cellular systems. |
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Amplifier is direct-connect: |
Directly attaches to 3G/4G data modem for maximum power transfer |
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Includes WWAN router (optional) |
Converts cellular 3G/4G data to WiFi/LAN |
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Cellular direct-connect In-Building Amplifier, outdoor directional yagi antenna |
| Improve in-building cellular coverage. System includes: |
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Outdor antenna is directional: |
provides high antenna gain. Need to orient to direction of maximum received signal strength. |
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Amplifier/Router/surge protection similar to case above with omni-directional antenna |
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Special case for Option Globesurfer III Fixed wireless Terminal |
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Special case for Axesstel MV400-Series Gateway. For other Axesstel modems and gateways see /Signal_Improvement/Axesstel |
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Cellular wireless In-Building Amplifier, outdoor omni-directional antenna |
| Improve in-building cellular coverage. System includes: |
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Outdor antenna is omni-directional: |
Useful when you don't know direction of maximum received signal strength or don't want to orient outdoor antenna. Receives signal from all directions. |
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Outdoor antenna is also dual-band: |
work with both 800 & 1900MHz cellular systems. |
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Amplifier is wireless: |
amplifier doesn't physically attach to modem. Allows to use single amplifier with multiple 3G/4G phones/modems in the same room. |
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Includes WWAN router (optional) |
Converts cellular 3G/4G data to WiFi/LAN |
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Cellular wireless In-Building Amplifier, outdoor directional antenna |
| Improve in-building cellular coverage. System includes: |
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Outdor antenna is directional: |
provides high antenna gain. Need to orient to direction of maximum received signal strength. |
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Amplifier/Router/surge protection similar to case above with omni-directional antenna |
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Special case for Option Globesurfer III Fixed wireless Terminal |
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High Gain Yagi Antenna for Option Globesufer III
(Generic for any radio. Just change the antenna pigtail.) |
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1900MHz In-Building Solution for Extremely Low RSS & Wide Area Coverage
This is specifically where we need to cover a large room and the outdoor signal is very weak. This is specific for 1900MHz (hint Sprint PCS uses only 1900MHz but for other carriers need to figure out from their tech support or from the mobile device what frequency is in use). Note that if your outdoor signal is very strong you would need to use an appopriate attenuator to avoid saturating the high gain amplifier/ repeater |
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1900MHz In-Building Solution for Multiple Rooms
Similar to above but in this case we need the boosted cellular signal to cover multiple rooms. In this case the distance to the room is close enough such that the losses through the coaxial cable and the -3dB loss through the splitter doesn't take the signal below noise floor. For more splitters/combiners or diplexers see Radio Passives |
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| WIMAX DRAWINGS |
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Generic WiMax USB Modem Dual Antenna Configuration (for 4G ONLY)
Pigtail options for Sierra Wireless 250U & Ubee PXU1900 (Clear 4G USB modem) |
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Simplified Construction Drawing for Portable Cellular 3G & WiMax 4G Internet Solution
Example of what is needed to place a Cellular/WiMax/WiFi router in a pelican case and drill through-holes for multiband Cellular/PCS/WiMax antenna and WiFi antenna including pigtails, cables and connectors. We show solution using Sierra 250U modem available from Clear/Sprint but could be extended to any 3G, 4G or Dual 3G/4G modem. Contact us for alternates or variations. |
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Remote Mobile Communication Solution #2
Generic example of a communication trailer for example for emergency management. Shown here with aggregation of 5 cellular 3G and WiMax 4G data modems for increased performance and redundancy. Design includes:
- [Page1] Isolation of 3G Cellular & 4G WiMax RF paths with cross-band coupler/ diplexer for independent boosting (and to prevent filtering out of higher frequency Wimax band by 3G cellular bi-directional amplifiers).
- [Page2] Splitting 2.4GHz WiFi RF path into two channels one goes to outdoor MIMO antennas and other goes to indoor antennas.
Shown for vehicle use but easily adapter to building, remote sites, etc. Contact us for entire solution and for your custom design based on specific constraints and target specifications. |
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WiMax Antenna Solutions for Digital Signage and Remote Kiosk Internet
Different topologies shown for hooking up a remote dynamic messaging system or remote kiosk internet. Techniques equally applicable for 4G LTE systems using equivalent LTE antennas (or multiband antennas to enable both 3G & 4G data). |
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1900MHz 3G Cellular & 2.5-2.7GHz 4G WiMax In-Building Solution (uses diplexer to re-use same coaxial transmission cabling)
To improve indoor coverage of dual 3G/4G systems. We use a high-gain directional cellular band antenna (1.9GHz PCS) and a high-gain directional WiMax antenna (2.6GHz). We pass the cellular signal through an RF bidirectional amplifier (BDA) and combine it with the WiMax signal using a low-loss 2-way diplexer. We then couple the signal to the 3G/4G modem. Contact us if interested in using MIMO diversity as well or see the forums. |
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High Gain Directional Antenna for WiMax 4G Modem
(for Xohm/Clearwire Zyxel Modem) |
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High Gain Directional Antenna for WiMax 4G Modem
(for Xohm/Clearwire Zyxel Modem w/ lightning discharge device) |
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Clear 4G USB Modem (PXU1900) Outdoor Omni-Directional Antenna
Improving In-Building coverage for the Clear 4G USB Modem (PXU1900) using outdoor omni-directional antennas (2 antennas used for full MIMO support). |
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Clear 4G USB Modem (PXU1900) Outdoor Directional Antenna
Improving In-Building coverage for the Clear 4G USB Modem (PXU1900) using outdoor directional panel antennas (2 antennas used for full MIMO support). |
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WiMax MIMO External Antennas (Omni-Directional + Directional Panel)
Shown in this drawing to include a Peplink MultiWAN router which combines multiple WiMax, Cellular or other ISP Inernet connections for increased bandwidth. For example if you have multiple LAN clients that need to concurrently upload or download data using a WiMax connection, you may combine multiple WiMax connections to improved average speed per client or for redundancy/failover. |
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Mobile Cellular Amplifiers. Mobile 3G/ 4G Routers & Antennas |
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Need an amplifier that is capable of handling mobility (wireless data communications systems degraded by a phenomenon called doppler frequency spread in a moving vehicle). |
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Need an omnidirectional antenna since direction of maximum received signal strength varies depending on where vehicle is more on cellular antennas |
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Typically powered by a DC/DC converter from the car battery. |
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Wireless systems components should be capable of handing temperature gradients and vibration dynamics of a moving vehicle. |
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| Drawing Link |
Brief Description |
Estimate |
E-Store Bundle |
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Remote Mobile Communication Solution #3
Generic example of a communication trailer for example for mobile office. Shown here with cellular to PSTN phone/ fax system (Fixed Wireless Terminal) and Cellular 3G/4G router. Uses 2 WAN's for data to provide seamless failover in the event that one data network fails. Also provides for a Cellular bi-direcitonal amplifier to ensure maximum speed of cellular 3G data modem. |
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Remote Mobile Communication Solution #1
Generic example of a communication trailer for example for emergency management. Shown here with option to extend wireless Internet coverage for 2 miles using a portable Point-to-Point Microwave data link. Contact us for entire solution and for your custom design based on specific constraints and target specifications. |
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Remote Mobile Communication Solution #2
Generic example of a communication trailer for example for emergency management. Shown here with aggregation of 5 cellular 3G and WiMax 4G data modems for increased performance and redundancy. Design includes:
- [Page1] Isolation of 3G Cellular & 4G WiMax RF paths with cross-band coupler/ diplexer for independent boosting (and to prevent filtering out of higher frequency Wimax band by 3G cellular bi-directional amplifiers).
- [Page2] Splitting 2.4GHz WiFi RF path into two channels one goes to outdoor MIMO antennas and other goes to indoor antennas.
Shown for vehicle use but easily adapter to building, remote sites, etc. Contact us for entire solution and for your custom design based on specific constraints and target specifications. |
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Vehicle direct-connect dual-band amplifier
Directly attaches to 3G/4G data modem, 800/1900MHz
Direct-Connect Dualband Vehicle WWAN (for Option Globesufer III FWT) |
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RV/ Camper Cellular Amplifier & 3G/ 4G Router |
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Mobile Office Communication w/ MultiWAN Router
Combines several 3G/4G data cards, WiFi & Satellite. Allows link-aggregation/ load-balancing to improve the connection speed/latency and failover for redundancy/ nation-wide coverage. |
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Medium Range Wireless Bridging Solutions |
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These applications pertain to situations where you need to extend your WLAN or Internet access outside the range of 802.11b/g/n radios i.e greater than ~500ft (150m) to about 3500ft (~1km) and at high datarate ~10mbps or more. See below for long range links > 1mile. |
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802.11n radios on the right channel will easily give you in excess of 300FT of coverage. Before spending money on costly bridges investigate whether you could boost the performance of your existing system (you often can using directional antennas, amplifiers, power-line adapters etc.) Learn More |
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Lighting surge suppression devices critical if mounting antenna in roof. Appropriate lightning device properly grounded in accordance with NEC or other applicable local regulations STRONGLY recommended more on lightning devices |
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Do be a good neighbor and observe FCC EIRP (Effective Isotropic Radiated Power). Where possible utilize high directivity antennas to reduce chances of interfering with other neighboring unlicensed band devices. |
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Long Range Wireless Bridging Solutions |
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By long range we mean > 1mile to several miles. Depending on desired data-rate, available frequency band and available line-of-sight, 50+ miles possible with tens of mbps and decent fade margin. Setting up a long-range wireless link is not a trivial exercise especially if using an unlicensed frequency band and trying to push throughput. |
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RF line-of-sight (LOS) is not the same as optical line-of-sight. You could have an optical line-of-sight and still not have RF LOS if there are obstructions in the Fresnel Zone (and Fresnel zone depends on wavelenght/frequency of signal). Non-line-of-sight (NLOS) and near-line-of-sight (nLOS) links possible but at reduced datarate Learn More |
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Typically the higher the frequency band the more the available bandwidth hence the higher the possible datarate (simplest form is bound by shannon channel capacity proportional to the Bandwidth and log of SNR). So millimeter wave (MMW) at 60GHz allows for better datarate than 5.8GHz or 900MHz but since the beamwidth is much smaller it requires more careful alignment and since wavelength is much lower more susceptible to rain fade. |
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Often the Capex required to implement long-range links is outweighed by 3G/ 4G WWAN links even after considering monthly subscription costs. The latter further provides for almost seamless migration to newer faster protocols. |
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Contact us for your custom system design. |
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Wireless Video Surveillance Applications |
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It's important to be realistic with your expectations. You should not expect to stream high quality video in real-time on a high latency 1xRTT or EDGE network! Learn More |
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All new projects should utilize IP cameras. Where possible legacy analog cameras should be replaced or encoded to IP. |
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With wireless video surveillance it takes more than just high speed backhaul. Jitter and latency can kill the project. |
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Brief Description |
E-Store |
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Solar Powered Wireless Video Surveillance for Remote Locations
Example solution to monitor remote sites such as construction sites, utility installations or other areas where no power exists (and outside range of power-over-ethernet use). Sample system includes all the components: Solar PV system (solar modules, battery bank, charge controllers, dc-dc converters, dc-ac inverters, LVD's etc), outdoor rugged network PTZ camera, wireless long range point-to-point radio for video data backhaul & remote monitoring/ viewing/ control software.
Solution may be customized for different cameras, different loads, different ranges (up to several miles even > 50 miles), portability, different wireless technologies e.g Cellular, Satellite, WiMax, LTE, Point-to-Multipoint, Mesh networks etc. View more on solar, long-distance links, battery backup, 4G Wimax, wireless video or simply contact us to begin your customized design. |
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Portable Wireless Video Surveillance w/ 900MHz Point-to-Multipoint backhaul radios.
The camera node is portable and uses a 900Mhz Non-line-of-Sight PtMp radio to connect to a fixed site receiver/monitoring site up to 1000ft away. Basic concept can be replicated for different link distances and frequency bands e.g 2.4GHz, 4.9GHz (licensed public sector), 5.8GHz as well as for licensed 3G cellular (EVDO, HSDPA) and 4G (WiMax). |
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Wireless Video Surveillance Backhaul w/ 5.8GHz Point-to-Multipoint backhaul radios
The camera nodes are fixed and since we have a clear line-of-sight (LOS) to the central base-station site where the network operations center resides we use a 5.8GHz point-to-mulitpoint radio network. This provides enough bandwidth for high definition real-time video. Designed for links outside the range of standard WiFi reach. Basic concept can be adapted for different link distances and frequency bands including links greater than several miles and redundant mesh networks for resiliency. |
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Point-to-Multipoint Non-line-of-sight wireless video backhaul |
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PTZ Camera, Solar/Pv, Battery Backup & Long-Range Point-to-Point |
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Wireless Telemetry, Automation & Control |
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Most popular wireless thermostat, the Totaline/ Venstar system is too simple to install to deserve any technical drawings. Refer to product page for technical specs More |
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For most residential/ commercial wireless HVAC needs the Totaline/ Vestar or Honeywell RedLINK™ products typicall suffice Learn More |
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As with most other data systems, when trying to remotely monitor environmental conditions such as temperature, humidity, CO2, CO for data logging or as part of a SCADA system, the goal is usually to convert it to IP as early as possible (prefereably at the sensor node) and use TCP/IP transport to remote storage server or monitoring stations. Rfwel's expertise in wireless data transport allows the economical bridging of distant sensors More on DAQ's |
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Radio Over IP [Over Wireless] & Radio Interoperability |
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ACU-100M Interoperability System allows cross connection of different communciation systems: HF, VHF, UHF, Trunked Systems, Cellular PTT, Cellular Voice, PSTN, Sattelite Systems Learn More |
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The NXU-2A Network Extension Unit allows distribution of Radio Cicuits over IP LAN/WAN Learn More |
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Rfwel then uses our expertise on Wireless distribution systems both local/campus and long range to interconnect different radio transceivers Learn More |
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