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2. DAS Made Easy, (OK
Easier) The What’s, Why’s,
and How’s of Distributed
Antenna Systems

3. THE “WHAT”
 A Distributed Antenna System or DAS
A Network of spatially separated antenna
nodes
Connected to a common transport medium
Typically Fiber-optic
 Connectivity to the Carriers
Direct connection
Off-air repeater/BDA

4. THE “WHY”
 Why do I need a DAS
To extend coverage
To increase capacity
Seamless high quality customer
experience
Over 70% of mobile devices make calls or
access the internet from indoors
Existing outdoor signals not able to
penetrate indoors

5. THE WHY (CONT)
Exabyte = 1 Billion Gigabytes
Cisco VNI Country Mobile Forecast

6. THE “WHY” (CON’T)
 Value-add
 Increased revenue opportunity for venue
owners
 Sport Stadiums – Improved access to SM
 Business – Improved rental revenue growth
 Education – Improve student/faculty
productivity
 Hospitals – Reduce dependence on fixed
lines

7. THE “HOW”
 Pre-Installation
Test for existing signal levels
Test for signal interference
Identify problematic areas
 Review building pathways
Review potential donor antenna location
Review potential location for headend equipment
including availability of fiber and power
System design
Carrier and Public Safety coordination

8. THE HOW (CON’T)
 Installation
 Headend Assembly
 Point of interface (BDA or BTS)
 Remote Assemblies
 Transmits signal from headend to system
antennas
 Antenna Assemblies
 Omni and directional, multi-frequency
 Cable Assemblies
 Cut to length, terminated and tested

9. THE HOW (CON’T)
 Post Installation
 System Optimization and testing
 Connect carrier and public safety to headend
 Optimize power levels per design and carrier
specs
 Test live system performance and provide
coverage map
 Work with the testing agency to ensure
compliance and final acceptance

10. THE HOW (CON’T)
 System Monitoring
 99.999% uptime for connectivity and power
 Security
 Environmental
 Carrier Spectrum analysis
 Ongoing system support
 Medium, High and Critical

11. THE “WHO”
 So, who needs a DAS
Shopping Centers and Retail Parks
Sports Stadiums and Arenas
Convention Centers
Large office complexes
Airports
University and College Campuses
Hospitals
….Just about anywhere people congregate!

12. COMPONENTS OF A DAS
 Bi-directional Amplifier (BDA)
 Coaxial cable
 Connectors
 Antenna (Over-the-Air)
 Antenna

13. QUESTIONS