There are three main types of Distributive Antenna System (DAS) designs passive, active, and hybrid. The most common system recommended today is a hybrid DAS, which is considered the best option about 60% of the time. Active systems are recommended around 32% of the time, while passive systems are applied about 6% of the time. Passive systems are the simplest and most affordable to install but they do not offer the same reliability. A passive DAS is more commonly found in smaller buildings with fewer interruptions to RF signals. Active systems are the most complex and provide the greatest coverage. They are used in larger buildings with a lot of RF signal loss. Lastly, hybrid systems offer the best of both by combining the technology used in active and passive systems.

A Breakdown of Each Type of DAS Design

Passive DAS – Passive DAS is typically used indoors and for smaller areas. It is considered the simplest option in terms of design and is therefore more cost effective. The system consists of a repeater that transfers signals to and from the antenna. It relies on coax cabling to move the signals. A passive DAS is often recommended for buildings shrouded in metal, concrete, or thick masonry. These are all examples of materials that are difficult for RF signals to penetrate and, as a result, tend to block signals and cause “dead zones.”

Active DAS – Active DAS is more complex than a passive DAS. It is typically used in larger spaces or venues. If there are additional barrier materials blocking RF signals, an active DAS may be necessary to improve signal strength. This system includes fiber optic cabling that are capable of altering RF signals into light for distribution purposes, before turning it back into a recognizable signal once it reaches its intended destination.

Advanced fiber technologies are employed by up to 65% of engineers who specialize in DAS design. As a result of more advanced fiber technologies, digital transportation of RF signals is greatly enhanced. In many cases, this type of system can improve coverage as well as capacity and overall performance.

The downside to an active system is that it requires additional maintenance when compared to a passive system. Although, the enhanced communication capabilities and reliability make up for that in many cases.

Hybrid DAS – A combination of a passive design that relies on coax, and an active design that relies on fiber optics, Hybrid systems offer the best of both worlds. A hybrid system combines the technology of coax and fiber optics to distribute signals. It is a single passive DAS that is connected to a few passive systems that rely on RF amplifiers.

Since it is similar to a passive system, the design and installation tend to be less complex. This option typically produces better signals and offers fewer signal losses than a passive system. Although, there is still some signal loss because the antennas are wired together through coaxial cables. Over 50% of engineers believe that hybrid systems often make the best option.

What is the Best DAS Design for Your Building? – We offer free pre-testing of signal strength and site surveys. During this process, an engineer comes on site to assess your building or venue. As a result, we can provide you with the knowledge you need to decide on the best system regarding budget, reliability, and so forth. Contact us today to learn more and set up your free consultation and assessment.

SOURCE:

http://micro.apitech.com/pdf/whitepapers/DAS-API-WhitePaper.pdf

Two-way radios are designed for businesses like yours. They are durable, reliable, and free from the distractions present on a modern-day smartphone. On the other hand, smartphones are designed to distract with endless apps, photos, and text messages pouring in. All in all, smartphones are highly distracting and can actually lead to mistakes and other issues in the workplace.

The Benefits of Two-Way Radios for Businesses

There are many reasons businesses are making the switch from cell phones to two-way radios, here are five of them.

#1. More Affordable – Two-way radios help you run a successful business without the high costs of smartphones and costly cell phone plans. Cell phone companies have found countless ways to tack on extra fees to your monthly bill. Radios don’t come with the same range of fees that cell phones do, like data charges or roaming fees. Not to mention, many smartphones cost over $1,000 these days. Radios are far more affordable and don’t come with the same risk of added fees. Plus, since they are more durable and less likely to break, you’ll spend less money fixing and replacing devices.

#2. More Reliable – Cell phones are not made to withstand the harsh environments found on construction sites and other work zones. On the other hand, there are many two-way radios that are designed to withstand everything from water to hard falls, and even fire. This is crucial in an emergency situation because it means radios will continue to work when cell phones may not. Plus, in a crisis cell phone towers become overwhelmed by everyone trying to make calls or send messages. All the while, radio communication remains open and more reliable.

Additionally, radios work on ships out at sea and in other locations where cell phone signals are nowhere to be found. Plus, two-way radios provide clearer communication in loud work zones. These are just some of the many reasons two-way radios provide more reliability than cell phones.

#3. Better Network Security – Security is crucial when operating a business. Two-way radios provide enhanced security when compared to a cell phone. Cell phone networks are easier to breach and more heavily targeted. With two-way radios, there are several options you can rely on to keep private conversations private.

#4. Enhanced Communication & Group Collaboration – Thanks to a handful of features offered on two-way radios, it’s a lot easier to communicate as a group. You can send private or group messages with the push of a button. This improves safety and collaboration efforts, allowing everyone from construction workers to school security personnel to communicate quickly and efficiently.

#5. Prolonged Battery Life – Battery life is a huge concern. It is common for cell phones to not last through an entire shift without dying. As cell phones get older, battery life continues to decrease. Two-way radios are made to last through long shifts and there’s always the option to add reliable battery extenders. Plus, since there are far fewer distracting things to do on a two-way radio, battery power isn’t wasted surfing the web or texting.

The Benefits of Florida Fleet Talk

The one thing you used to be able to argue for cell phones is that they can communicate across longer distances. While traditional two-way radios didn’t have the capacity to communicate across hundreds of miles, our radios do thanks to Florida Fleet Talk.

For only $25 per radio/per month, Florida Fleet Talk ensures your two-way radios communicate across secure and reliable radio raves that extend from Jacksonville all the way down to Miami. That’s up to 300 miles of communication with no interruptions, static, or sound quality issues. You get clear and reliable communication across nearly the entire state of Florida. That’s communication you can count on.

Learn more about Florida Fleet Talk

SOURCES:

https://blog.amerizonwireless.com/two-way-radio-or-cell-phone-whats-best-for-your-business

 

If you’re looking to find the best two-way radios for your team, you’ve come to the right place. Allow us to break down the most important factors that influence 2-way radio selection by offering a list of questions you can ask yourself to help narrow down your needs. After all, there are many different types of radios that offer various features. Ultimately, the best option for you depends on application, environment, and budget.

8 Questions That’ll Help You Identify the Ideal Two-Way Radio for Your Needs

There are a wide variety of two-way radios out there—the goal is to find one that best fits your needs. So, what are your needs? We recommend starting by jotting down a list of the features you need a two-way radio to offer—such as Bluetooth, GPS, intrinsically safe, etc. The following questions are intended to help you narrow down your list of must-have features.

#1. Are two-way radio needs short term or long term?

If you only need radios for a specific window of time, say for instance one season, or over the weekend for a concert, you may want to consider renting radios instead of buying them. This may offer a more cost-effective option. Especially considering we offer affordable Kenwood and Motorola two-way radio rentals that include chargers and all other necessary accessories.

#2. Do radios need to be intrinsically safe?

A radio that is Certified Intrinsically Safe can be used in hazardous environments. It is designed to withstand a wide range of elements, from water to fire, while still remaining functional. Intrinsically safe radios are required in certain settings, such as onboard ships, as well as for Marine and Fire Team communication. In fact, recent updates to the law require two intrinsically certified radios onboard every ship.

#3. What tier of communication platform do you require (for ships)?

There are three tiers of communication levels:

• Mission Critical Tier System (best)
• Professional Tier System (better)
• Commercial Tier System (good)

The ideal system for your fleet can be determined by three different factors: available budget, vessel size, and functionality requirements. Learn more about the three different systems and what they offer here.

#4. Will radios be used in a rough environment where durability is crucial?

There are water-proof radios, dust-proof radios, and radios built tough enough to withstand a pretty steep fall. In addition, there are radios that get the job done but are not intended for high risk environments. It all depends on what you need situationally. It’s worth investing in a more durable and rugged radio if you need it, but if you don’t, you might save money by going with a less hardy model.

#5. Are you going to be discussing confidential information over two-way radios?

Certain two-way radios offer advanced features to heighten security when communicating across the network to one or multiple people at once.   

#6. How long will radios be in use for each day before retiring to their charger?

If radios require long-term usage, you may want to consider adding a battery extender. Not to mention, Motorola is known for their long-lasting IMPRES^TM battery technology. 

#7. Do you require communication across UHF or VHF frequency bands?

Are you communicating on VHF/Very High Frequency [low band—49 to 108 MHz, or high-band—169 to 216 MHz]? Or, UHF/Ultra High Frequency [low band—450 to 806 MHz or high-band—900 to 952 MHz]? Some radios are equipped to handle both, but not all radios are. It’s important to know what frequency band you’ll be communicating across when picking the best two-way radio for your fleet.

#8. Do you require advanced features?

From basic two-way radios to more technically advanced radios, you have a good deal of options based upon your needs. Some advanced features available for two-way radios that may be of interest to you include:

• Bluetooth
• GPS & tracking
• LCD color screen
• Hands-free
• Voice activated
• Full keyboard
• Submersible
• Intrinsically safe
• IMPRES^TM battery technology (offered on Motorola radios)

The job of a Distributed Antenna System (DAS) is to improve wireless signals in an indoor or outdoor space, essentially anywhere with an obstructed signal. Some of the most common issues related to designing a DAS include budget and time restraints, the inability to remove certain interferences, and planning for future expansion—just to name a few.

Solutions to 4 Common DAS Design Challenges

There is no one-size-fits-all solution for DAS. Buildings and venues are unique in many ways, and therefore, the appropriate system must be custom made to fit the needs of each space. The following challenges are commonly faced during the design phase. Luckily, there are solutions to help work around each issue.

DAS Challenge #1: Budget & Time Restraints

There are a variety of factors that influence the cost and time frame it takes to develop a DAS. For instance, what frequency range does the system require—Very High Frequency (VHF), Ultra High Frequency (UHF), or 700 to 800 MHz public safety? The latter is the easiest and most cost effective to construct, while VHF and UHF are costlier and more complex. No matter what, it takes time and money to install custom cabling, fiber optics, and other equipment.

The best solution is to plan for costs ahead of time by getting a free upfront quote from Highland Wireless. We offer free pre-testing of signal strength levels and a site survey. Even if your building is in pre-construction, we still offer a quote based on floor plans. Contact us today to learn more.

DAS Challenge #2: Near-Far

The near-far issue relates to a device that is operating on the DAS coverage zone, while it is serviced by a microcell tower that is not nearby. As a result, the DAS is affected because it must work overtime to transport data as the mobile device communicates with the macro network. Therefore, this creates interferences and performance issues with the DAS.

The solution is to design the DAS with this in mind, taking into consideration how much macro signal bleeding occurs in a building or at a venue. Then, create a DAS signal that is powerful enough to keep the mobile device operating on the DAS as opposed to switching back and forth between the macro system and the DAS.

DAS Challenge #3: Inability to Remove Certain Interferences

During the DAS design phase, all potential interferences must be identified and addressed. These interferences may include surrounding buildings, noise, fortified construction, and so forth. When possible, some interferences can be removed, but most of the time, the goal is to work around interferences. After all, realistically, not all interferences can be removed.

The practical solution to the problem is to detect all causes of interference. If a certain source cannot be removed or identified, the use of automatic detection and mitigation helps ensure the effectiveness of the DAS.

DAS Challenge #4: Looking Towards the Future

As technology continues to evolve and the use of mobile data increases, it’s important to look towards the future when designing a DAS so that it remains efficient over the long haul. One way to ensure this happens is to share the roadmap for growth with the designer and engineer of the DAS. This may include plans to expand, obtain more traffic flow, or increase current subscriber data. It is crucial to take the right steps towards ensuring future traffic and wireless network demands can be met by the system.

Learn more about our advanced DAS Design and Engineering services

Distributed Antenna Systems (DAS) are specially designed to improve wireless coverage throughout a building or outdoor venue, basically just about anywhere where wireless signals are obstructed. Some important considerations to make during the DAS design phase include identifying interferences, assessing performance, and addressing potential issues like near-far disturbances.

5 Things to Consider When Designing DAS

The design phase is crucial to developing a successful DAS. Before any work begins, there is an RF analysis focused on performance outcome. The engineer and design team generally take the following things into consideration during this process. 

#1. Overall Efficiency of Signal Propagation

A large percentage of industry engineers will tell you that signal propagation is easily one of the more important elements of a well-designed DAS. Signal propagation relates to the transmission of the radio signal from the station’s antenna to the receiver’s antenna.  To install a successful system, it’s crucial to assess the ways in which signals are propagated. It’s important to consider this early on in the design process, deciding upon the addition of macrocells and microcells. Microcells institute larger volume areas when there are many wireless users in a given space. 

#2. Aim for Optimal Performance

To achieve optimal performance, it’s important to minimize undesired factors like interference and background noise. On the other hand, you want to maximize desired factors. One of the biggest factors that negatively impacts performance is interference, which can be caused by signals in other circuits, or even the same circuit, such as ID card readers, two-way wireless communications systems, and other types of electronics.

Large buildings, especially high-rise buildings with 15+ floors, can imitate an RF shield, promoting the likelihood of interference and poor coverage. There are some unpredictable types of co-channel interference with the potential to obstruct DAS, thus impacting overall performance.

It’s important to take into consideration all potential interferences during the design process, including below grade floors, surrounding buildings that may block out signals, and so forth.  Of course, you cannot remove all interferences—say for instance the large building to your left. So, instead, the goal is to work with the surrounding space to improve performance as best as possible.

#3. Designing DAS for the Future

There are many factors that might not matter today but they will matter in the near future. After all, technology and data usage continue to grow and advance at unprecedented rates. The DAS design phase entails addressing issues that’ll arise in the future, not just today.

#4. The Near-Far Issue

Engineers typically address the near-far issue during the DAS design phase. Near-far is the reduction in performance a device suffers when it is operating within the area of a DAS while being serviced by a distant macrocell tower. As a result, it must work double-time. Transmitting at a higher power to reach the macro network can cause the rest of the DAS to downgrade in performance. For the most part, DAS does not address the near-far issue. Although, it’s still important for designers and engineers to work out these issues in the design phase for the best possible results.

#5. Integrate Small Cells

While DAS does not require small cells, many see it as part of the future of DAS development. Research has shown the ability for small cells to assist the system in high volume areas or venues. While DAS is the better option for reliable high-density wireless capacity traffic venues, small cells complement these systems well. Plus, small cells are rather efficient. It is becoming more common to integrate small cells with DAS. Therefore, this is something else to consider during the design phase.