SECTION 27 64 10 DISTRIBUTED ANTENNA SYSTEM (DAS ...

SECTION 27 64 10

DISTRIBUTED ANTENNA SYSTEM (DAS) & LOUDOUN COUNTY RADIO ALERT SYSTEM

(REV 09/14/18) DISTRIBUTED ANTENNA SYSTEM (DAS) & LOUDOUN COUNTY RAD

11/14 27 64 10 - 1

PART 1 - GENERAL

1.1 SUMMARY

A. The Distributed Antenna System (DAS) and Loudoun County Radio Alert System are

each a standalone system (two systems).

B. The system must meet the requirements of County of Loudoun Emergency Communi-

cations.

1. Compliant Public Safety In-Building Two-Way Radio Communications En-

hancement Systems Requirements.

C. The contractor will design, furnish, install, and provide a five (5)-year warranty for a

Fiber Distributed Antenna System (DAS) In-Building First Responder Network (pub-

lic safety use). See other sections in this specification for additional warranties relat-

ing to other system components. The installed system will include fiber optic cabling

in conduits, roof mount tower, tower mounted antenna, indoor antenna, antenna sys-

tem integrity alarm, 70% of battery capacity remaining alarm, alarms remoted to fire

control room using an independent fire control panel, alarm interface compatibility to

standard fire alarm panels, all hardware, bi-directional amplifiers, band-pass filters,

surge suppressors, lightning protection, transmission lines, power cabling, coaxial ca-

bling in j-hooks or conduits in walls or inaccessible ceiling spaces, UPS, repeaters,

design/installation labor, etc. Areas that typically need to evaluated for poor commu-

nications are:

1. Below grade rooms.

2. Elevators.

3. Areas surrounded by metal or concrete.

D. System shall operate at the fire command center, elevators, elevator lobbies, emergen-

cy and stand-by power rooms, standpipe hose connections, building engineer’s office,

mechanical rooms, elevator equipment rooms/closets, fire pump rooms, areas of res-

cue assistance, entries into exit stairways, main mechanical room, main electrical

room, stair enclosures,

E. The contractor must provide the turnkey, ready to use, installation of a complete,

working, in-building fiber based DAS-based signal booster system including design,

installation with UPS to hold DAS operational for a minimum of 24 hours setup and

optimization per NFPA72-2010 10.5.6.3.1. The secondary power supply shall have

sufficient capacity to operate the system under quiescent load (system operating in a

non-alarm condition) for a minimum of alarm condition) for a minimum of 24 hours

and, at the end of that period, shall be capable of operating all alarm notification capa-

ble of operating all alarm notification appliances used for evacuation or to direct aid to

the location of an emergency for 5 minutes.

F. This Contractor shall furnish and install all fiber optic cable in conduit for the

entire run. Minimum conduit size for fiber optic cable shall be 3/4-inch.

G. System design shall take into account:

1. External macro signals.

2. Potential sources of interference.

3. Actual building construction materials.

4. Expected traffic in every area and density will be provided to accommodate a

30% increase in capacity.

(ELEMENTARY SCHOOL NO. 29)

DISTRIBUTED ANTENNA SYSTEM (DAS) & (REV 09/14/18)

LOUDOUN COUNTY RADIO ALERT SYSTEM

27 64 10 - 2 11/14

H. The purpose of this system is to provide communication coverage for public safety

personnel when performing their duties in the building per NFPA 72-2010 Chapter 24

5.2 requirements. The intent of this system is to provide the coverage, so that these

personnel will be able to communicate anywhere within the building, to exterior

commanders, personnel, and dispatchers under the worst of conditions.

I. Active Distribution. Active components shall be interconnected only with single-

mode plenum rated fiber optic cable and connectors meeting manufacturer’s recom-

mendations.

J. Perform and provide a RSSI signal level map at the donor location and provide a de-

tailed system design that will meet the coverage and capacity requirements of the

County of Loudoun.

K. Remote Management. The DAS shall provide for remote configuration, control, and

monitoring of active components.

L. An automatic monitoring system with a dedicated panel in the emergency command

center of the building is required.

M. Network Management System (NMS): The DAS shall have a NMS capable of alarm,

monitor, configuration and control of all Active Components.

N. Simple Network Management Protocol (SNMP) Alarm Reporting and SNMP Integra-

tion: The DAS NMS shall be capable of integration with third party SNMP based

NMS products for alarm purposes and provide alarming information.

O. Public Safety Network (PSN) Approval. The Contractor shall design and implement a

DAS capable of receiving the approval or certification from the local operator(s) of a

respective band.

P. School Alert Radio Installation: A complete system with school alert radio and cam-

pus radio plenum cabling, repeaters, roof mounted weatherhead and antenna mast with

antennas, lightning protection for a complete operating alert radio and campus radio

repeater system. The alert system radio is a custom built radio package by LCPS

UHF/VHF cross band repeater. UPS is not required as it is included in the custom ra-

dio package.

1. LCPS will install the alert radio equipment at cable terminations.

Q. Fire stopping shall be installed at all firewall penetrations.

1.2 DEFINITIONS

A. ATTENUATION: The reduction in signal power, expressed in decibels, as a result of

coupling, heat loss, or transmission distance in a cable or in air.

B. BDA: Bi-directional amplifier in-building radio communication system that brings

wireless signals into a structure from outside, amplifies those signals with a signal

booster, and then evenly distributes the amplified signals throughout a structure via a

Distributed Antenna System (DAS). The system also amplifies signals originating in-

side the building and transmits them outside.

C. BIM: Building Information Modeling.

D. CABLE ASSEMBLY (JUMPER): Short length of flexible coaxial cable used to attach

antennas or other components to the main coaxial cable distribution system.

E. DAS: (Distributed Antenna System): A network of service antennas connected at in-

tervals along shielded coaxial transmission lines and all connected to head-end elec-

tronics amplifying the signals to be distributed. Often refers to a system that includes

both the passive distribution system and the active amplifying electronics.


(REV 09/14/18) DISTRIBUTED ANTENNA SYSTEM (DAS) & LOUDOUN COUNTY RADIO ALER

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F. DIRECTIONAL COUPLER: A component which directs a small portion of down-

stream RF energy to a port which can be connected to an antenna or another branch of

distribution cabling, and also serves as a combiner of upstream energy between the tap

port and the through connection.

G. DONOR ANTENNA: The antenna, usually mounted on the outside of a structure

where a DAS is installed, which picks up signals over-the-air from a donor source.

H. DONOR SOURCE: The repeater, transceiver, cell site or other radio site that produc-

es signals which a DAS will relay and distribute.

I. REFLECTED POWER: Power which is reflected back along a transmission line as a

result of discontinuities in line impedance caused at connectors or close proximity of

metallic objects.

J. RF (RADIO FREQUENCY): Energy from electromagnetic waves, or alternating cur-

rents that produce electromagnetic waves, in the spectrum of radio frequencies (30

kHz to 300GHz).

K. SPLITTER: A passive component that has a single input port and two or more output

ports, effectively splitting the signal equally amongst the output ports. It also serves to

combine upstream signals from the "output" ports into composite signals at the "input"

port.

L. TERMINATION: A device that is installed on the end of a transmission line to pro-

vide a pure resistive 50-ohm load.

1.3 REFERENCES

A. Codes and orders: The design of all equipment and materials shall conform to the fol-

lowing codes and orders:

1. NFPA 1-2012.

2. NFPA 72 2012 Chapter 24.

3. IFC 2012 Section 510.

B. Rules, Regulations and Plans:

1. FCC Rules and Regulations 47 CFR

C. Standards: The following standards shall apply to the design work, and are hereby

made a part of these Specifications to the extent referenced:

1. Telecommunications Industry Association (TIA) Technical Systems Bulletin

TSB 88-A

1.4 CONTRACTOR QUALIFICATIONS AND WORKMANSHIP

A. The Contractor shall provide documentation demonstrating five (5) years of experi-

ence designing, installing, and commissioning DAS solutions of a similar scope and

complexity.

B. The Contractor shall provide documentation demonstrating certification from the

manufacturer of the active components of the DAS.

C. The Contractor shall comply with the latest editions of the National Electrical Code,

National Electrical Safety Code, National Contractor’s Association Standard of Instal-

lation, relevant local regulations, and manufacturer’s instructions during the design,

installation, and commissioning of the DAS.




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1.5 PRE-COMMISSIONING ACTIVATION AND OPTIMIZATION

A. The installer posts the Provisional Retransmission Authorization at the headend loca-

tion. The install notifies the Owner and LCPS Safety and Security when ready to acti-

vate for the initial time. If required by the County of Loudoun and/or LCPS, an initial

desense test is coordinated for the first activation of the system. The installer conducts

system activation and optimization.

1.6 FIRE ALARM/TWO-WAY RADIO COMMUNCIATIONS ENHANCEMENT SYSTEM

TESTING

A. The installer coordinates scheduling of the system testing with the fire alarm contrac-

tor at the site with the Architect, Owner, and LCPS Safety and Security. Testing shall

include the following:

1. Installer.

2. Fire alarm contractor.

3. Electrical Contractor.

4. County of Loudoun staff.

5. LCPS Safety and Security staff.

1.7 DAS PERFORMANCE SPECIFICATIONS

A. The primary requirement is to provide in-building signal booster systems that must re-

ceive and re-transmit to support Loudoun County Sherriff and Fire and Rescue Radio

Systems. This is a P25 800 MHz system. This system must be state-of-the-art, oper-

ating bi-directionally and in full-duplex. The system shall be fully compatible with

and shall function on the Loudoun County Public Safety Radio System.

B. Public Safety Network Approval. The contractor shall design and implement a DAS

capable of receiving the approval or certification from the local operator(s) of a re-

spective band.

C. Active Distribution. Active components shall be interconnected only with single-

mode fiber optic cable.

D. Remote Management. The DAS shall provide for remote configuration, control, and

monitoring of active components.

E. PERFORMANCE

1. The DAS shall meet or exceed the Minimum Downlink Receive Signal Level

(RSL) as described in Table 2.

F. Completed installations (including cabling) must comply with all applicable codes and

standards, including County Building and Electrical Codes, NFPA, ANSI, NEC,

OSHA, EIA, IEEE, R-56 etc., as well as, the FCC Rules and Regulations, as applica-

ble. Equipment manufacturer shall be Commscope Andrews Wireless Node A Sys-

tem. The system shall use fiber optic cable to minimize any cable losses. Equipment

provided must be UL listed and the FCC type accepted for this specific application.

Compliance to codes and standards must extend to include proper grounding, bonding

and surge protection. A coverage Acceptance Test shall be executed prior to final ac-

ceptance of an installed system. Coverage acceptance testing shall be based on audio

quality performance in evenly spaced test grids (minimum of 20 grid cells per floor

area) in the defined service areas. A minimum of 20 (twenty) tests will be taken per

floor/level.



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1. Refer to the 2012 International Fire Code (IFC) 2012 Section 510

EMERGENCY RESPONDER RADIO COVERAGE. All new buildings

shall have approved radio coverage for emergency responders within the

building based upon the existing coverage levels of the public safety commu-

nication systems of the jurisdiction at the exterior of the building.

G. The system will provide digital signal strength coverage over 99 percent floor area ra-

dio coverage area on each floor/level of the equipped building, or in specific areas de-

fined by the County in a Scope of Work document for a particular building or site.

Systems must provide a minimum digital and analog coverage of Circuit Merit (CM)

3, with a reliability factor of 100 per cent. A Coverage Acceptance Test must be exe-

cuted prior to final acceptance of an installed system. Coverage acceptance testing

must be based on audio quality performance in evenly spaced test grids in the defined

service areas. A minimum of twenty tests will be taken per floor/level. Total number

of test grid cells will be determined by the County AHJ, based on the size of the space

per floor/level.

H. System design shall take into account:

1. Potential sources of interference.

2. Actual building construction materials.

3. Extended traffic in every area and density shall be provided to accommodate

a 30 percent increase in capacity.

I. The DAS system shall be powered by the building’s electrical distribution system. A

transient voltage surge suppressor shall be provided as part of the bidirectional ampli-

fier design, and protect the incoming power line from transients.

J. Provide uninterruptable power source(s) (UPS) capable of maintaining the system op-

erational for a period of at least 24 hours per IFC Section 510 (appendix J) J103.1.3

secondary power.

K. In-building antenna system: The in-building antenna system shall consist of a suffi-

cient number of antennas and/or radiating cable distribute with the building to meet

the -90 dBm, or 10 dB above noise floor, design criteria throughout the building. Co-

axial power dividers shall distribute and balance the radio signals into appropriate

branch circuits connecting back to the DAS.

1. Each splitter shall be mounted in a separate junction box located so as to be

easily accessible for maintenance while maintaining security from tampering.

Each junction box shall be labeled externally. Also, provide label below grid

indicating junction box location above.

2. Antenna Isolation: Provide an antenna isolation of a minimum 15 dB higher

than the signal booster gain of the amplifier per NFPA requirements under all

operating conditions.

L. Degraded performance in emergencies:




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1. The signal booster shall be designed to allow degraded performance in ad-

verse conditions, such as high temperatures in the event heat from a nearby

fire, voltage fluctuations or other abnormal conditions that may occur during

an emergency. Circuits that intentionally disable the signal booster in such

situations (i.e. under/over voltage, over/under current, over/under tempera-

ture, high VSWR, etc.) are not acceptable. It is the purpose of this specifica-

tion to assure the maximum possible level of communications to public safety

personnel depending upon the signal booster even to the extent of damaging

the signal booster as long as some communications benefit can be provided

during the emergency.

M. During initial installation, each system must be optimized to perform in accordance

with the specifications set forth in the system design, manufacturer’s specifications

and FCC regulations. The contractor must ensure that uplink and downlink levels are

properly set and consistent with design expectations. The contractor must further en-

sure that noise and spurious products are held within limits set forth in the system de-

sign, manufacturer’s specifications and FCC regulations. Prior to system acceptance,

for each active DAS, booster amplifier, etc., the contractor must submit a Proof of

Performance certification, that lists the design expectations, actual measurements, and,

if applicable, FCC specifications for the following parameters:

1. Worst case DAS uplink input level, in dBm.

2. Worst case DAS uplink output level, in dBm.

3. DAS downlink input level, in dBm.

4. DAS downlink output level, in dBm.

5. Noise and spurious products, DAS uplink output, in dBc.

6. Noise and spurious products, DAS downlink output, in dBc.

N. The original Proof of Performance report must be submitted to LCPS project manager,

and a copy of the Proof of Performance report must be affixed to its associated

equipment.

O. The system is designated for in-building use and must be designed and quoted as fol-

lows:

P. Design and appearance will be of “finished” construction, etc. must be concealed

and/or unobtrusive in the administrative areas. Flush-mount ceiling antennae may be

acceptable on a case-by-case basis. “Wiremold” type installations will not be ac-

ceptable unless approved by the Loudoun County Public Schools in advance.

Q. Loudoun County, Virginia operates a Motorola Dual mode ASTRO/TDMA Trunked

Simulcast Digital Public Safety Radio System, which utilizes frequencies in the 806-

825/850-869 MHz frequency band. Systems shall be capable of upgrade, to allow for

instances where the jurisdiction changes or adds system frequencies, in order to main-

tain radio system coverage as originally designed.

See attached table. 800 MHz Channels assigned to Loudoun County by Region 20

and the FCC.

R-20 Channel # Base Xmit Mobile Xmit System Channel #

1) 641 851.5500 806.5500 10

2) 644 851.5875 806.5875 9

3) 661 851.8000 806.8000 8

4) 678 852.0375 807.0375 7

5) 681 852.0750 807.0750 6



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6) 701 852.3250 807.3250 5

7) 722 852.6125 807.6125 11

8) 755 853.0500 808.0500 4

9) 804 853.6625 808.6625 3

10) 813 853.7750 808.7750 2

11) 824 853.9125 808.9125 1

1.8 ALERT RADIO SYSTEM:

A. The primary requirement is to provide in-building alert radio systems that must re-

ceive and re-transmit to support Loudoun County Public Schools Alert Radio System.

This system must be state-of-the-art, operating bi-directionally and in full-duplex.

The system shall be fully compatible with and shall function on the Loudoun County

Public Schools Alert Radio System. Provide antennas and cable from antenna to the

data closet. System is to be installed by the Owner.

1.9 SUBMITTALS

A. Comply with Division 01 section “Submittals Procedures” and Division 27 section

“Common Work Results for Communications”.

B. Provide Product data. For each type of product indicated, submit application, tech-

nical, and installation data. Include dimensions and manufacturers' technical data on

features, performance, accessories, and finishes. All product data sheets, etc. are to be

labeled to indicate DAS or Alert Radio System.

1. Bill of Materials (BOM)

2. Component data sheets

a. Donor and in-building antennae

b. Coaxial cable, connectors, splitters, combin-

ers, and couplers

c. Fiber optic cable and connectors

d. Class A channelized bi-directional amplifi-

er(s) (BDA)

e. Fiber optic master unit(s)

f. Fiber optic remote unit(s)

g. Network Management unit(s)

3. Design documents

a. RF link budget

b. Overlay of system components on floor plans

c. Donor antenna and grounding drawings

d. Bill of Materials (BOM)

e. Maintenance Service Contract

f. Statement of Work (SOW): The contractor

shall submit a SOW that has been accepted by

the customer or customer’s designated repre-

sentative.

g. Acceptance Test Plan (ATP): The contractor

shall submit an ATP that has been accepted

by the customer or customer’s designated rep-

resentative.




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C. Shop Drawings: For DAS head-end and distribution system. In accordance with Divi-

sion 27 section “Common Work Results for Communications”.

1. All shop drawings, etc. are to be labeled to indicate DAS or school campus

alert radio system.

2. Include dimensioned plans, floor plans with cable routing, antenna locations

(roof) and interior, equipment locations with elevations including panel, rack,

and cabinet layouts, sections, details, and attachments to other work, includ-

ing required clearances and service space around equipment.

3. Provide a riser diagram.

4. Show fabrication and installation details of tower, tower base, and tower top.

Designate components and accessories, including clamps, brackets, fittings,

etc.

5. Detail fabrication, including anchorages and attachments to structure and to

tower.

6. Donor antenna lightning suppression and grounding details.

7. Dimensional Plan and Elevations of Head-end Equipment: Show access and

workspace requirements.

8. Wiring Diagrams: For power, signal, and control wiring and transmission ca-

ble, include cross connects, taps, equipment interconnection diagrams, and

other connections, cords.

9. RF link budget.

10. Show locations of bonding connections.

11. Signal to Noise Interference Ration (SNIR) map.

D. Design Calculations: Calculate signal attenuation budget and show calculated line

and equipment losses for the system based on the functional block diagram, to show

that system layout can be expected to perform up to the specification. Calculate signal

strength from sources to endpoints. Allowable losses between components and user

interface shall be used to determine size and type of cable.

E. Equipment List: Include each piece of equipment and include model number, manu-

facturer, serial number, location, and date of original installation. Insert testing record

of each piece of adjustable equipment, listing name of person testing, date of test, and

description of as-left set points.

F. Field quality-control test reports. Submit written test reports to include the following:

1. Test procedures used.

2. Test results that comply with requirements.

3. Results of failed tests and corrective action taken to achieve test results that

comply with requirements.

G. Field quality-control reports.

H. Submittal Requirements at Close Out

1. Drawings: Submit BIM as-built drawings indicating:

a. Donor antenna, grounding and lighting pro-

tection details

b. Cable routing, splitters, couplers and coverage

antenna locations

c. Active component locations, layout and con-

figuration

2. Test Reports



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a. PSN: Submit Accepted ATP reports confirm-

ing the requirements of Section 1.07 B have

been met.

3. Field Reports: Submit sweep-testing results for all cable runs.

4. Field Reports: Submit OTDR test results for all fiber runs.

5. Operation and Maintenance Data: Submit hardware and software manuals for

all Active Components.

6. Warranty Documents:

a. Submit for all manufactured components

specified in this Section.

b. Submit Contractor’s System Warranty.

c. Submit Manufacturer’s Extended Warranty

I. Operation and Maintenance Data: For head-end and distribution system to include in

emergency, operation, and maintenance manuals:

1. Refer to Division 01 Section “Operation and Maintenance Data”.

2. All product data sheets, drop drawings, etc. are to be labeled to indicate DAS

or alert radio system.

3. Instructions for periodic testing and inspection.

4. Provide signal strength propagation modeling in 3D.

5. Tests shall be to determine if impedance values remain within specified max-

imums, and instructions shall recommend corrective action if they do not. In-

clude recommended testing intervals.

6. Service Manuals:

a. Service manuals shall be supplied for each

signal booster. The minimum contents of each

manual shall include:

1) Operating and installation detail.

2) Block (sub assembly) overall circuit diagram with assembly num-

ber detail.

3) Mechanical assembly drawing with part number detail.

4) Detailed schematic circuit diagrams listing all components and lo-

cations.

5) Detailed parts list.

b. NOTE: Equipment provided without detailed

schematics and parts lists are unacceptable.

J. BIM Coordination Drawings: Reflected ceiling plans, drawn to scale, on which ceil-

ing-mounted items including lighting fixtures, diffusers, grilles, speakers, sprinklers,

access panels, and special moldings are shown and coordinated with each other, using

input from installers of the items involved.

K. Qualification Data:

1. Certification of in-building system training issued by a nationally recognized

organization or school.

2. For factory trained technician/installer.

L. Copy of valid FCC issued General Radio Operators License for:

1. System designer

2. Tester




27 64 10 - 10 11/14

3. Lead installation personnel

M. Resumes for:

1. System designer

2. Project manager

3. Lead installation supervisor

N. Provide four references for prior Public Safety in-building reinforcement systems.

O. Provide training/education certificate issued by equipment manufacturer of equipment

being installed.

P.

Q. Provide documentation demonstrating certification from the manufacturer of the ac-

tive components of the DAS.

R. Warranty Documents

1. Contractor’s system warranty

2. Manufacturer’s extended warranty

1.10 COORDINATION

A. BIM Coordination Drawings: Coordinate layout and installation of ceiling-mounted

antenna system with other construction that penetrates ceilings or is supported by

them, including light fixtures, HVAC equipment, fire-suppression system, and parti-

tion assemblies.

1.11 QUALITY ASSURANCE

A. Conditions for Consideration of “comparable product” products: Where products are

specified by name and accompanied by the term “comparable product”, the proposed

“comparable product” will be considered when the following conditions are satisfied.

Refer to Division 01 section “Product Requirements”. If all the following conditions

are not satisfied, the Engineer will return requests without action, except to record

noncompliance with these requirements:

1. Proposed product does not require extensive revisions to the Contract Docu-

ments.

2. With the exception of the product name or number and manufacturer’s name,

proposed product conforms with requirements indicated on the Drawings and

in the Specifications in every aspect and will produce indicated results.

3. Proposed product is fully documented and properly submitted.

4. Proposed product has received necessary approvals of Authorities Having Ju-

risdiction (AHJ).

5. Proposed product provided specified warranty.

6. If proposed product involves more than one contractor, proposed product has

been coordinated with other portions of the Work, is uniform and consistent,

is compatible with other products, and is acceptable to all contractors in-

volved.

7. Submission is accompanied with detailed comparison of significant qualities

of proposed product with those named in the Specifications. Significant quali-

ties include attributes such as performance, weight, size, durability, visual ef-

fect, and specific features and requirements indicated.

8. Submission is accompanied with a list of similar installations for completed

projects with project names and addresses and addresses of design consultants

and authorities.



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9. Submission is accompanied with proposed product’s Manufacturer signed

written statement on Manufacturer’s letterhead, certifying that manufacturer

complies with requirements in the Contract Documents.

B. The minimum qualifications of the system designer, tester, and lead installation per-

sonnel shall include:

1. A valid FCC issued General Radio Operators License


organization or school.

3. Provide training/education certificate issued by equipment manufacturer of

equipment being installed.

C. Installer Qualifications: Factory trained technician who is trained and approved for

installation of units required for this Project.

D. Testing Agency Qualifications: Qualified agency, with the experience and capability

to conduct testing indicated.

E. Source Quality Control: Materials and equipment shall be new, unused and UL listed

(UL Standard 1459).

F. NFPA 72-2010

1. 24.5.2 Two-way Radio Communications Enhancement Systems.

2. 10.5.1 System Designer.

3. 10.5.2 System Installer.

4. 10.5.3 Inspection, Testing, and Service Personnel.

5. 10.6.7 / 10.6.7.3.1 Secondary Power Supply.

6. 14.4.10 In-Building Emergency Radio Communications Systems (testing).

7. A.14.4.10 In-Building Emergency Radio Communications Systems (testing

annex).

8. IBC Section 915.

9. NFPA 70 National Electrical Code Articles 810 and 820.

10. IEEE Standard No: 205-2001.

11. ANSI/TIA – 568C Telecommunications Standards for Pathways.

G. The system and components shall be supplied by one manufacturer of established rep-

utation and experience who shall have produced similar apparatus for a period of at

least ten (10) years and who shall be able to refer to similar installations rendering sat-

isfactory service.

H. The DAS System and Alert Radio System shall be installed by the manufacturer’s au-

thorized distributor and factory trained installation contractor with full manufacturer’s

warranty privileges for the specified system, hereinafter known as the “DAS System

and Alert Radio System Trade”. The installation shall include wiring, components,

connections, adjustment, testing, and certification. The Electrical Trade shall provide

j-hooks, conduit, junction boxes and pull boxes as indicated and required by the DAS

System and Alert Radio System manufacturer’s drawings or Trade instructions. The

DAS System and Alert Radio System Trade shall furnish any special boxes, cabinets,

enclosures and similar items to the Electrical Trade for installation by the Electrical

Trade in accordance with the manufacturer’s drawings, Trade instructions, and as in-

dicated. All repeater, transmitter, receiver, and signal booster components shall be

contained in a NEMA 4 or NEMA 4X type enclosure(s) per NFPA72-2010 24.5.2.5.4.

I. BICSI Telecommunications Distribution Methods Manual (TDMM), latest edition.




27 64 10 - 12 11/14

J. The DAS and Alert Radio System Trade shall furnish a list of similar or equal installa-

tions (a minimum of ten) and show at least five (5) years of company experience in

this type of work.

K. Nameplates: Except for required labels and operating data, do not attach or imprint

manufacturer's or producer's nameplates or trademarks on exposed surfaces of prod-

ucts that will be exposed to view in occupied spaces or on the exterior.

L. The DAS shall comply with the latest edition of NFPA 1.

M. The DAS shall transmit the requested frequency bands simultaneously over one pas-

sive component installation.

N. Non-Interference: Per NFPA 72-2010 24.5.2.1.1. No amplification system capable of

operating on frequencies or causing interference on frequencies assigned to the juris-

diction by the FCC shall be assigned to the jurisdiction by the FCC shall be installed

without prior coordination and approval of the authority having jurisdiction.

O. System wiring shall be in accordance with good design practices as established by the

EIA and NEC. Wiring shall meet all established State and Local electrical codes. All

wiring shall test free from grounds and shorts.

P. In addition, this system shall be approved, inspected, and tested by the County of

Loudoun Telecommunications Division.

1.12 DELIVERY, STORAGE, AND HANDLING

A. Deliver all materials in good condition, store in a dry place, off ground, and keep dry

at all times.

B. Materials shall be clearly marked with project name, state contract number, and Con-

tractor’s name.

C. Any equipment dropped or damaged, is to be replaced at the Contractor’s expense.

1.13 COMMISSIONING

A. Authority reserves the right to determine the final approval of the system at the time

of scheduled job completion. Failure to meet the installation schedule or provide the

"precise functional equivalent" shall result in the removal of the system at the Con-

tractor's expense

1.14 WARRANTY

A. Refer to Division 01 section “Warranties”.

B. The DAS System and Alert Radio System Trades shall warrant this system for a min-

imum of five (5) year against defective parts and/or workmanship and shall provide

parts and labor to fulfill this warranty at no cost to Owner.

C. Five (5) year limited warranty from the date of system acceptance on splitters, cou-

plers, and in-building antennae

D. Twenty year limited warranty from date of system acceptance on coaxial cable, fiber

optic cable and connectors

E. All tests are to be performed by a factory certified technician.

F. The DAS System must provide a full five (5)-year warranty, from date of acceptance

by Owner, to cover installation and all equipment, software, and components; the war-

ranty must commence upon the County’s final acceptance of the facility

G. Under warranty coverage, the successful contractor must provide same business day

response time for system malfunctions.



11/14 27 64 10 - 13

H. The contractor must perform optimization of each system during the initial warranty

period, sixty (60) to ninety (90) days prior to warranty expiration. This optimization

task is separate from the initial optimization performed during system installation.

The contractor must include pricing for annual system optimization to be included as

part of post-warranty maintenance.

I. Actual scope of work for annual optimization and maintenance will vary on a case by

case basis, but will typically consist of the following:

J. Optimize the system to perform in accordance with the specifications set forth in the

system design, manufacturer’s specifications and FCC regulations.

K. Ensure that uplink and downlink levels are properly set and are consistent with design

specifications.

L. Ensure that noise and spurious products are held within limits set forth in the system

design, manufacturer’s specifications and FCC regulations.

M. Update the Proof of Performance records for the system, listing the design expecta-

tions, actual measurements, and, if applicable, FCC specifications for the following

parameters:

1. Worst case DAS uplink input level, in dBm.

2. Worst case DAS uplink output level, in dBm.

3. DAS downlink input level, in dBm.

4. DAS downlink output level, in dBm.

5. Noise and spurious products, DAS uplink output, in dBc.

6. Noise and spurious products, DAS downlink output, in dBc.

N. The updated Proof of Performance report must be submitted to the LCPS Senior Pro-

ject Manager, and a copy of the updated Proof of Performance report must be affixed

to its associated equipment.

O. Visually inspect outside antenna installation. Correct any issues found with the an-

tenna mounting hardware, grounding system, or outside cabling.

P. Visually inspect inside DAS or booster amplifier equipment installation. Correct any

issues found with RF cabling, electrical connection, or equipment mounting.

Q. Clean equipment fans, filters and other ventilation system components.

R. Inspect and replace any defective indicator lights.

S. Test UPS system performance for proper fallback to battery power and the duration of

battery operation.

T. Test fault reporting system for proper operation and reporting of system faults.

U. Submit a written Preventive Maintenance Report to LCPS Project Manager, listing the

results of the optimization and preventive maintenance effort. The report must in-

clude the Proof of Performance report for active RF components, and details of any

other discrepancies found and corrective actions taken.

1.15 AS-BUILT DRAWINGS

A. BIM as-builts will be submitted to the Loudoun County Radio Engineer at comple-

tion. To include antenna system layout and all associated hardware, along with speci-

fication sheets. Include RF measurements taken.

1. Provide riser drawings of the complete system including all device locations

and cabling.

2. Provide 1/8-inch scale drawings in hardcopy and electronic format including

all device locations and cabling.

3. As-builts by the Contractor shall include parts lists and wiring diagrams that

clearly indicate all equipment, locations, wiring, and connections.




27 64 10 - 14 11/14

1.16 MANUFACTURER’S EXTENDED WARRANTY

A. The Manufacturer shall administer a follow-on program through the Contractor to

provide support and service to the County. The program shall cover a certified system,

defined as a DAS installation performed by a certified contractor using certified com-

ponents while following all the Manufacturer’s installation instructions, recommenda-

tions, and best practices. The program shall include:

1. A twenty-five (25) year warranty, provided by the Manufacturer and the Con-

tractor, on all coaxial cable, fiber optic cable, and connectors

2. An assurance that, during the twenty-five (25) -year warranty, the DAS shall

support current and future modulation formats in the frequency bands for

which it is designed per NFPA 72.

B. Diagrams: The Contractor shall furnish three complete sets of operating instructions,

including cable diagrams, and other information necessary for proper installation, op-

eration and maintenance of the system components. As-built drawings of the system

shall be supplied. These drawings shall include signal levels measured throughout the

system as they were at the acceptance date of the system.

C. The Manufacturer and Contractor, using a schedule agreed upon by the County, shall

remediate any failure of the DAS whether during ATP, normal use, or the upgrade of

the DAS to support additional frequency bands.

D. The Manufacturer shall maintain ISO Quality Control registration for the facilities that

manufacturer any component of the DAS.

1.17 MAINTENANCE

A. The Contractor shall show satisfactory evidence that he maintains a fully equipped

service organization, capable of furnishing adequate inspection and service to the sys-

tem, including standard replacement parts. The Contractor shall be prepared to offer a

service contract for the maintenance of the system after the guarantee period.

B. Service Calls: Provide eight (8) hours of service calls on system in school after final

acceptance to make any adjustments necessary to keep system at peak operating con-

dition. Service calls performed as requested by the Owner. Warranty work is not in-

cluded in the service call time.

C. Service Contract: Equipment Supplier: The Contractor shall provide an optional

maintenance service contract, covering for a period of one-year: preventative mainte-

nance, system monitoring, spares, fault mitigation, equipment repair, and response

time. Accredited by proposed equipment manufacturers and prepared to offer service

contract for system maintenance on completion of guarantee period and provide

names, locations, and size of 10 recent successful installations in area; 24 hours per

day service, with 24 hour non-emergency service response time provided, and includ-

ing 1 hour emergency call response time on 365-day- per-year, 24 hours per day basis.

PART 2 - PRODUCTS

2.0 GENERAL

A. The contractor shall design, furnish, install, and warranty a complete signal booster

system for the DAS. The installed system shall include all hardware, bi-directional

amplifiers, band-pass filters, surge suppressors, lightning protection, UPS, transmis-

sion lines, power cabling, antennas, and other components necessary for a complete

operational system as specified and as acceptable to the local authorities having juris-

diction.



11/14 27 64 10 - 15

B. The contractor shall install all antenna, j-hooks, conduits, cables, connectors, lightning

protections, junction boxes, all supporting devices, etc. for a complete operation sys-

tem.

2.1 ROOF COMMUNICATION TOWER (NO SUBSTITUTIONS)

A. The external antenna system shall consist of a Rohm Products, LLC ROHN #45G se-

ries antenna, ROHN # 45AG3 top assembly, Rohm flat roof mount base # FR45G,

and coaxial lightning surge suppressor. The antenna gain shall be selected to provide

the minimum required signal level.

1. Locate tower to avoid signal obstructions and minimize visibility from all di-

rections of grade.

2. 360 degree line of sight. No structure within 20-feet and taller than antenna

tower.

3. Mount tower to roof structure, coordinate installation with architect and struc-

tural engineer. The use of guywires is prohibited. The use of ballast roof

mounts/sleds is prohibited. Coordinate tower base plate installation with

structural engineer and architect. Antenna tower to be installed above or as

close as possible to second floor data closet where BDA and radio equipment

shall be installed.

a. Tower: Rohm # 45G

1) 10-feet section with optional double bracing.

b. Tower Top Section: Rohm # 45AG3.

1) Tower height: 9’-0”.

4. Antenna Flat Roof Mount Base: Rohm # FR45G.

B. Lightning surge suppressor shall be connected to the feed line in-between the antenna

and the DAS. A cooper grounding plate shall be provide with the surge suppressor,

and bonded to the grounding system. The DAS is to be installed in the building, the

surge suppressor will be installed in the building at the cable penetration point. Build-

ing penetration for the feed line cabling shall be protected with a waterproof/UV stabi-

lized cable boot suitable for the installation, or with an electrical service weather head

with a cable drip loop.

C. The antenna system, antenna mast, cable, and surge suppressor shall be grounded by

attachment to the building’s grounding system. Grounding cable shall be sized ac-

cording to manufacturer’s recommendations.

2.2 LIGHTING PROTECTION (NO SUBSTITUTIONS)

A. Each cable requires one polyphaser for lighting protection inside the building entry on

a grounded buss bar.

1. Polyphaser # IS-50NX-C2: Lighting protector: flange mounted, dc block sin-

gle transmitter coaxial lighting protection for 125MHz to 1 GHz with N fe-

male connectors.

2. Polyphaser # TSX-NFF Bi-Directional Broadband DC Short Filter operating

between 698 MHz – 2.7 GHz with N Female Connector.

3. Times Microwave # LP-GTR-NFF-23: DC to 3.0 GHz Gas Tube Lightning

Arrestor (Alert Radio System): Passes up to +/- 230 VDC. Bi-directional,

bulkhead or flange mount. N/F connectors on both sides.

a. Frequency Range: 0-3 GHz.




27 64 10 - 16 11/14

b. Maximum Power: 220 Watt.

c. Nominal Insertion Loss: 0.1 db.

d. Compliance Standards: CE.

e. Protector Side Connector: N female.

f. Surge Side Connector: N female.

2.3 TOWER MOUNTED ANTENNA (NO SUBSTITUTIONS)

A. Tessco # 525096 Panorama Antennas Ltd # BSV-155-S4-821 – Light Duty Tri-Band

Fixed Site Antenna (Loudoun County Alert Radio System) (NO SUBSTITUTIONS).

Lightning protection DC Ground, V-Bolt Mounting, set of two V-bolts clamp sets for

3-inch maximum OD round, wind speed 125 MPH.

1. Light duty tri-band fixed site antenna.100 watt with N female connector.

a. Frequency:

145-174/420-489/700/800 MHz.

b. Gain dBi: 2/0/2

dBi.

c. Gain dBd: 0

dBd.

d. Impedance: 50

Ohms.

e. Polarization: Verti-

cal.

f. Horizontal Beamwidth: 360

degrees.

g. Pattern:

Omni-directional.

h. Maximum VSWR:

3.0:1.

i. Maximum Power: 100

Watt.

j. Lightning Protection: DC

Ground.

k. RF Connectors: N

Female.

l. Mounting Hardware: Mast

Mount.

m. Maximum Rated Wind Velocity: 100

mph.

n. Height:

22.4-inches.

o. Length:

29.25-inches.

p. Width:

29.25-inches.

q. Weight: 1.5

lbs.

r. Color:

Black.



11/14 27 64 10 - 17

s. Material: Flexible

TPU, stainless steel,

nylon,

black chrome plated brass.

B. Andrew DB499-A or comparable: Heavy duty yagi antenna.

1. Frequency Band, MHz 806–869

2. Gain, dBi 12.1

3. Beamwidth, Horizontal, degrees 60

4. Beamwidth, Vertical, degrees 30.0

5. Beam Tilt, degrees 0

6. Front-to-Back Ratio at 180°, dB 15

7. VSWR | Return Loss, dB 1.5 | 14.0

8. Input Power per Port, maximum, watts 150

9. Polarization Vertical

10. Impedance 50 ohm

11. General Specifications

12. Operating Frequency Band 806 – 869 MHz

13. Antenna Type Sector

14. Band Single band

15. Includes V-bolts

16. Performance Note Outdoor usage

17. Mechanical Specifications

18. RF Connector Quantity, total 1

19. RF Connector Quantity, low band 1

20. RF Connector Interface N Female

21. Color Silver

22. Grounding Type RF connector inner conductor and body grounded to re-

flector and mounting bracket

23. Radiator Material Aluminum

24. RF Connector Location Bottom

25. Wind Speed, maximum 125 mph

26. Dimensions

27. Length 31.0 in

28. Width 6.0 in

29. Depth 1.0 in

30. Net Weight, without mounting kit 5.1 lb

C. Astron Wireless Technologies # V4600: 450-470 MHz Unity Gain Fiberglass Omni

Antenna (School Radio System). (No substitutions).

1. V4600 unity gain omnidirectional antenna operating in 450-470 MHz fre-

quency range. Antenna has a mast diameter of 1.25-2.00 inches. Provide

mounting hardware and flexible pigtail terminating with a N female connect-

or.

a. Frequency: 450-470 MHz.

b. Gain dBi: 2.15 dBi.

c. Gain dBd: 0 dBd.

d. Polarization: Vertical.

e. Maximum VSWR: 1.2:1.

f. Maximum Power: 100 Watt.




27 64 10 - 18 11/14

g. Lightning Protection: DC Ground.

h. RF Connectors: N Female.

i. Mounting Hardware: Clamp Set.

j. Maximum Rated Wind Velocity: 125 mph.

k. Dimensions: 24-inches H x 2-inches L.

l. Weight: 2 lbs.

2.4 IN-BUILDING OMNI-ANTENNA

A. Andrew # CELLMAX-O-CPUSE or comparable product: 360° omnidirectional in-

building antenna, 680-960 MHz and 1710-2700 MHz; impedance 50 ohm; maximum

input power 50W. Color=White, ceiling mount. Provide thru-hole ceiling mount, pig-

tail cable KSR195, plenum rated, RF Connector: N Female.

1. Provide wire guards where required.

B. Andrew # CELLMAX-D-CPUSE or comparable product: Directional in-building an-

tenna, 698-960 MHz, 1710-2700MHz. Color = White. Use Four (4) hole mounting

plate and hardware included with antenna.

1. Provide wire guards where required.

2.5 RADIO FREQUENCY (RF) DAS-BASED SIGNAL BOOSTER SYSTEMS

A. In-building signal booster systems shall receive and re-transmit the entire up-

link/downlink frequency band utilized by the regional emergency service provider(s).

The contractor shall confirm with the regional emergency service provider(s) as to the

specific frequencies used by the various agencies. This system shall be state-of-the-

art, operating bi-directionally and in full duplex. The system shall be fully compatible

with and function on Loudoun County’s Public Class A and channelized Safety Radio

System.

2.6 HEAD-END RACK (NO SUBSTITUTIONS)

A. Racks: Head-end racks, NEMA4 cabinet securely mounted to floor, shall be equipped

with a 7-foot high, 19-inch wide equipment rack for voice and data equipment and

terminations and shall consist of enough sliding shelves, cable organizers, hooks, and

new switches for a complete and operational system that conforms to NFPA 72-2012.

Enclosure cabinets shall protect equipment from water. Provide adequate ventilation

to vent excessive gassing released from the batteries. Provide NEMA 4 cabinet with

sealed louvers/vents to meet NEMA 4 watertight standards without trapping gasses

1. Aluminum, 7-feet high x 19-inches wide, self-supporting base, boltable to

floor with 79-inches of mounting space.

2. Horizontal Cable Management: 19-inches wide filling two (2) rack units.

3. Vertical Cable Management Cage with Cover: Provide two (2) per rack.

3.75-inches x 6.58-inches x 7-feet, single sided. Ortronics Part #OR-

SVMS704

4. Cable Rings: Use as needed. Ortronics Part # OR-CR-93S-2B, OR-CR-93S-

4B.

5. Guard Rail: One guard per rack. 2.88-inches high x 19.81-inches wide x

4.50-inches Deep. Color = Black. Ortronics Part # OR-GR-19B.

6. Blank panel for use in covering unused space in an ION-B subrack. The quad

electrical outlet designated for each rack is to be mounted on the rack, not on

the adjacent wall at 36-inches AFF.



11/14 27 64 10 - 19

7. Racks shall be bolted to the floor.

2.7 RACK-MOUNTED BATTERY BACK-UP UNITS: (BATTERY BACK-UP UNITS)

A. Per NFPA72-2010 10.5.6.3.1. The secondary power supply shall have sufficient ca-

pacity to operate the system under quiescent load (system operating in a non-alarm

condition) for a minimum of alarm condition) for a minimum of 24 hours and, at the

end of that period, shall be capable of operating all alarm notification capable of oper-

ating all alarm notification appliances used for evacuation or to direct aid to the loca-

tion of an emergency for five (5) minutes. Provide quantity of units as required.

1. Tripp-Lite 120V Double 2U Conversion UPS: Model # SU1500RTXLCD2U.

2. Tripp Lite 48V 3U Rack Battery Pack and Enclosure: Model #

BP48V60RT3U.

2.8 GROUNDING:

A. Furnish and install #6 wire in 1-inch conduit from the work to the TMGB. Ground all

equipment in the respective data rack to the main rack ground point.

2.9 AMPLIFIER BDA & SUPPORTING REPEATER CARDS (NO SUBSTITUTIONS)

1. Single band, Class A 32 channel Public Safety BDA selected to support 800 MHz fre-

quencies via the GUI. Single band BDA can be upgraded to dual band via the pur-

chase of a software license key. Unit supports P25 digital as well as conventional ana-

log frequencies. Provides 90dB of gain, has 2 watts (33dBm) of downlink composite

power, utilizes 4.3-10 input/output connections and is ~58VDC powered. The unit is

NFPA and UL2524 compliant.

2. Web-based GUI and SNMP support for intelligent configuration and monitoring.

3. Frequency Bands Supported: 800 PS

2.10 MINI-REPEATER

A. Andrew Mini-Repeater MR8018 comparable product: Indoor coverage for 800 MHz

LMR applications. LCD display for RSSI, Gain, and Output Power. LEDs for local

alarm indicators. 120 volt.

2.11 OPTICAL DISTRIBUTED ANTENNA SYSTEM

A. Andrew ION-B Series Optical Distributed Antenna System or comparable product:

Radio-over-fiber system with TPRN sub-card, hosting all cards and the TFLN master

optical transceiver (TRX) providing RF to optical and optical to RF conversion,

1. Andrew # TPRN14 or comparable product: Universal mains sub rack; 12

slots 4HE x 7TE each.

2. Andrew # TFLN2504/4: Master Optical TRX (700 to 2700 MHz) or compa-

rable product: 4 optical links.

2.12 WIDEBAND 8-WAY RF COMBINER

A. Andrew # TLCN8-W or comparable product: Andrew ION-B series wideband 8-way

RF splitter/combiner to distribute the donor source signal to the optical TRXs of a

master unit. RF signals are transported to the remote units via single mode fiber at

1310 nm. Include all required jumper cable kits.




27 64 10 - 20 11/14

2.13 TPOI POINT OF INTERFACE FOR DUAL/TRIPLE BAND APPLICATIONS

A. Andrew ION-B series integrated point of interface which enables dual or triple band

applications. TPOI includes duplexer, digital adjustable attenuator, downlink auto-

matic level control (ALC) and cross band coupler functionalities which allows to feed

the master optical TRX with proper leveling.

1. Andrew # TP0I7/17 frequency band or comparable product: Cell700/AWS

2. Andrew # TPOI80/92/19E frequency band LMR800/LMR900/PCS1900 Ex-

tended or comparable product.

3. Andrew # TPOI85/17/19E frequency band Cell850/AWS/PCS1900 Extended

or comparable product.

2.14 HIGH POWER REMOTE UNIT

A. Andrew # TFAH-US7B-14 (with universal power supply) or comparable product:

Andrew ION-B series seven band high power remote unit designed to distribute cell

700, LMR800, cell 850, LMR900, AWS, extended PCS1900 and WiMAX band sig-

nals via single mode fiber. Include power supply.

2.15 SUPERVISION UNIT

A. Andrew # TSUN4 or comparable product: Andrew ION-B series plug-in supervision

unit (4HE x7TE) acts as a local control comparable product and manages all configu-

rations, alarm collection and alarm distribution functionalities and is internally pow-

ered.

2.16 TRIPLEXER

A. Andrew # CBC7821-DF or comparable product: Andrew ION-B series triplexer 700

and 750 cellular for AWS and PCS; 824-894 MHz.

2.17 TWO-WAY SPLITTER

A. Commscope # S-2-CPUSE-L-N or comparable product: Two-way low power splitter,

operating frequency band 698-2700 MHz; impedance 50 ohm, average power, maxi-

mum 50 Watts.

2.18 THREE-WAY SPLITTER

A. Commscope # S-3-CPUSE-L-N or comparable product: Three-way low power split-

ter, operating frequency band 698-2700 MHz, impedance 50 ohm, average power,

maximum 50 Watts.

2.19 FOUR-WAY SPLITTER

A. Commscope # S-4-CPUSE-L-N or comparable product: Four-way low power splitter,

operating frequency band 698-2700 MHz, impedance 50 ohm, average power, maxi-

mum 50 Watts.

2.20 DIRECTIONAL COUPLER

A. Commscope # C-6-CPUSE-N or comparable product: 6 dB directional coupler, oper-

ating frequency band 698-2700 MHz, impedance 50 ohm, average power, maximum

200 Watts.



11/14 27 64 10 - 21

2.21 JUMPER CABLE KIT

A. Commscope # TLCN2-W or comparable product: ION-B Series Wideband Two way

Splitter/Combiner/

2.22 NODE A 4 POSITION SUBRACK

A. Andrew # 7561392-0018 or comparable product: Four position subrack for the node A

selective multi-band repeater is the building block of the node A repeater system.

Amplifier accessory is 100-240 VAC powered. Antenna ports are N female and inter-

connect ports are QN female to connect to. Use with the following bands: TERTA,

LMR 700, LMR 800, cellular, LMR 900, UMTS 900, AWS 1700, GSM 1800, PCS

1900, or UMTS 2100

2.23 NODE A BLANK DUMMY MODULE

A. Andrew # 7574285-00 or comparable product: Dummy module for Node A repeater

system.

2.24 NODE A 800 SMR 5W AMPLIFIER MODULE

A. Andrew #7577538-00 or comparable product: Node A digital module for 800 MHz

band. Gain + 94dB and power = 5 watts.

2.25 CABLES AND CONNECTORS

A. All cables are to be plenum rated. Cabling installed on exterior of building or under

slab to be rated for installation type.

B. Fiber Optic Cable and Connectors

1. West Penn WP9BO48T: Indoor/OutdoorLow Smoke Zero Halogen Riser Dis-

tribution Cable, 12 fiber single unit or comparable product. Color = Rose.

C. Fiber Optic Pigtails

1. CommScope TeraSpeed single reinforced buffered 900 μm, LightScope ZWP

single-mode fiber, angled polished connector or comparable product.

2. Lengths: As specified or indicated

D. Coaxial Cable

1. Andrew # LDF4-50A: Under slab/exterior 1/2-inch coaxial cable. Copper

clad aluminum wire jacket color=black. Cable impedance 50 ohm ± 1 ohm or

comparable product.

2. Andrew # AL4RPV-50: .Plenum Rated Coaxial 1/2-inch coaxial cable. Cop-

per clad aluminum wire jacket color= off white, cable impedance 50 ohm ± 2

ohm or comparable product.

E. Coaxial Connectors

1. Andrew # AL4RPV-50 and Andrew # LDF4-50: Type N Male Positive Stop

for 1/2-inch coaxial cable or comparable product.

F. Type N Male Positive Stop

1. Andrew # L4TNM-PSA: Type N Male Positive Stop for 1/2-inch AL4RPV,

LDF4-50A cable or comparable product.

G. Splitters, Combiners, Couplers, Coax Jumpers and Connectors:

1. Approved Manufacturer: Andrew or comparable manufacturer.




27 64 10 - 22 11/14

H. Splice Wallet Kit

1. Commscope # KIT-SW-48-SFS-2FD or comparable product: Splice wallet

kit, 48 single fusion splices, 1U/U Shelf, 2 fiber drums or comparable prod-

uct.

I. Times Microwave # LMR-400-LL-PL 3/8-inch LMR-400 LL-PL BK Plenum Rated

Cable (Radio System) or comparable product.

1. Provide Times Microwave # LMR-400-LL-PL 3/8-inch LMR-400LL-PL-BK

plenum rated low loss coaxial cable with orange CATV-P rated jacket in an

indoor, fire-retardant cable. A 50 Ohm coax cable stranded outer conductor

and bare copper conductor. Provide a 100 percent coverage foil and 90 per-

cent coverage braided shield or comparable product.

a. Dielectric Insulation: PTFE,

b. Center Conductor Material: Copper Clad Alumi-

num.

c. Center Conductor Diameter: 100-inch.

d. Center Conductor Construction: Solid,

e. Nominal Core O.D.: 0.285-inch.

f. Nominal O.D.: 0.405-inch.

g. VOP: 76 %.

h. Shield: 100 % foil 90 % braid.

i. Nominal Capacitance: (pF/ft.): 27.0.

j. Loss @ 50 MHz: 1.00 dB.

k. Loss @ 100 MHz: 1.35 dB.

l. Loss @ 400 MHz: 2.74 dB.

m. Loss @ 900 MHz: 4.2 dB.

n. Loss @ 1000 MHz: 4.39 dB.

o. Jacket: Orange.

p. Warranty: Five (5) years

J. Times Microwave # EZ-400-NMH-X; N male Hex/Knurl Combo No Braid Trim

LMR 400. N male advantage connector for LMR-400 cable, gold pin, silver plate

body, no braid trim or comparable product.

1. Radio System Cable quantity = 2. Total of two LMB cable runs required for

Alert Radio System.

2. DAS Network Cable quantity = 1. One LMB cable run required for DAS

network.

a. For Cable: LMR400

b. Material (Pin): Gold.

c. Insulator Material: PTFE.

d. Frequency Range: 0-3 GHz.

e. Center Pin Type: Captivated.

f. RF Connector Type: Straight.

g. RF Impedance: 50 Ohms.

h. Max Voltage/Power: 1000 V peak.

i. Warranty: Five (5) years.



11/14 27 64 10 - 23

K. Fiber-Optic Master Unit: When building size dictates an Active fiber DAS, the Fiber-

Optic Master Unit shall convert radio over coax to Radio-Over-Fiber (RoF) for distri-

bution to Fiber-Optic Remote Units.

1. Characteristics

a. Transmission Media: Single-mode fiber at 1310 nm

b. Operating Temperature Range: +5 °C to +40 °C

c. Impendence: 50 Ω

d. Chassis:

1) Shall be of modular design capable of supportin≥g32 Remote

Units per 19”, 4 RU chassis

2) Shall support redundant power supplies 3) Shall have the capability to remotely power the Remote Units via

composite fiber-optic cable

e. Automatic Gain Control (AGC): Shall provide AGC for optical

loss compensation

f. Optical Budget: Shall support ≤ 3 dB optical budget (~3 km or 2

miles)

g. Auxiliary Channel: Shall provide an input to support 400 to 2700

MHz for future expandability

h. Interlink: Shall support one fiber or two fibers bi-directional opti-

cal link for distances up to 20 km with a 10 dB optical budget

i. Remote Supervision:

1) Shall support the TCP/IP protocol, SNMPv2, FTP, HTTP,

Telnet, and be fully compatible with general purpose SNMP

managers

2) Remote access shall be available via Point-to-Point Protocol

(PPP), over circuit-switched/packet data and wired/wireless mo-

dems

3) Each Active device shall be manageable via a Web GUI 4) Auto Mapping: Each board position shall be automatically

mapped during system turn-up

L. Fiber-Optic Remote Units: The Fiber-Optic Remote Unit converts the RoF signal back

to radio over coax, as well as provides filtering so that multiple frequency bands can

reside over the same passive cable and antenna infrastructure.

1. Characteristics

a. Operating Temperature Range: +5 °C to +40 °C

b. Impendence: 50 Ω

c. Power Consumption: ≤ 105 watts, maximum

d. MTBF (excluding external power supply): ≥ 160,000 hours

e. Physical: The Remote Unit shall consist of the following:

1) Ingress Protection: IP31 or equivalent

2) Frequency Bands supported: 769 - 806 MHz LMR, 806 - 869

MHz LMR/SMR/ESMR, 896 - 941MHz LMR/SMR/ESMR, 824 -

894 MHz Cellular, 1710 - 1755 MHz AWS, 1850 - 1995 MHz

PCS

3) Optical Port: 2xSC-APC connector (separated uplink/downlink)

4) Antenna Port: Single 50 Ω N type female connector




27 64 10 - 24 11/14

5) Auxiliary Ports: Two SMA female for future add-on modules

f. Uplink Noise Figure:

1) LMR 700, LMR 800, Cell850: ≤ 7.5 dB

2) LMR 700, LMR 800, Cell850 at band edges: ≤ 9.5 dB 3)

3) LMR 900: ≤ 8.5 dB

4) AWS: ≤ 7.5 dB

5) PCS 1900 extended: ≤ 7.5 dB

2.26 SLIDING MODULAR CASSETTE SHELF

1. Commscope # 360G2-1U-MOD-SD: 1U sliding modular cassette shelf. Ac-

cepts four (4) G2 modular cassettes or comparable product.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Contractor must be a licensed installer for County of Loudoun and Commonwealth of

Virginia.

B. The DAS and Loudoun County Campus Alert Radio System required separate LMR

cabling.

C. The DAS and backup power housing shall be mounted side by side. An electric circuit

breaker with one (1) 30 amp 120 VAC emergency dedicated receptacle shall be pro-

vided for the Distributed Antenna System (DAS) and campus alert radio system head-

end. Provide one (1) 20 amp emergency branch circuit for each future micro cell or

similar equipment. Each remote unit requires one (1) 20 amp 120 VAC receptacle

and emergency branch power circuit. Locate remote unit receptacle within 4-feet of

the remote unit. Each back up power supply shall have one (1) 20 amp dedicated re-

ceptacle and emergency branch circuit. The number of remote units and location shall

be determined via calculations and modeling of propagation results during design of

the system and shall be shown on the shop drawings and shall be verified in the field

at the time of installation. Remote units are wall mounted and require a wall space of

30-inches wide x 36-inches high. Once design of system has been completed, Con-

tractor shall determine emergency circuit(s) to be utilized at the direction of the Engi-

neer.

D. The Distributed Antenna System and Loudoun County Alert Radio Campus System

two (2) antennas shall be mounted to the Communications Tower. Plenum rated

LMR400 Cable shall be installed in a complete Rigid / IMC conduit system thru and

above the roof. In the building interior, j-hooks may be used except in walls or inac-

cessible ceilings where conduit is required. An electric circuit breaker panel with one

(1) 30 amp 120 VAC emergency dedicated receptacle shall be provided for the both

the Distributed Antenna System and Loudoun County Alert Radio System head-end.

The conduit shall be installed from the roof mounted Communications Tower in a

weatherproof head with drip loop to the security room adjacent to the security rack.

Both antenna cables shall be terminated through the lightning protection units. All ex-

terior donor antenna must be protected with a polyphaser device at entry point of the

building to the ground bar in the building to meet Motorola R56 specifications. The

lightning protection would be mounted to a copper ground bar within the room. Pro-

vide plenum rated LMR 400 cable from the ground bar to the security rack. LCPS

Safety and Security will install any required repeater(s) and the alert radio upon com-

pletion of all j-hooks and conduits and cables by this contractor.

E. All exterior cable shall be installed in a 2-inch Rigid / IMC conduit.



11/14 27 64 10 - 25

F. All interior fiber optic and coaxial cabling shall be installed in conduit; 3/4-inch EMT

minimum for the DAS.

G. Loudoun County Alert Radio System requires plenum cables. Conduit is not required.

H. Where not provided as part of the electrical work or DAS work, the contractor shall

furnish and install any necessary j-hooks, conduit, raceways, pull boxes, outlet boxes,

and cable to provide a complete system as herein specified. A junction box shall be

installed in the equipment room. The roof end of the conduit must extend two (2) feet

above the roof deck and be terminated with an electrical weatherhead.

3.2 TESTING

A. Upon completion of installation, the radio system tested to ensure that two-way cover-

age on each floor of the building reveals a minimum signal strength of -95 dBm in 99

percent of the building’s floor area radio coverage. All wiring shall be tested for con-

tinuity and freedom of all grounds and short-circuits. Signal strength measurements

should be taken at the center of each grid In addition, the quality of radio signal shall

be no less than Delivered Audio Quality (DAQ) 3.4 as defined by the Telecommuni-

cations Industry Association (TIA). The test procedure shall be conducted as follows:

1. Each floor of the building shall be divided into a grid of 20 approximately

equal areas.

2. The test shall be conducted using a calibrated portable radio of the latest

brand and model used by the Loudoun County’s Public Safety Radio System

talking through the agency's radio communications system.

3. A maximum of two nonadjacent areas shall be allowed to fail the test. This

cannot be determined until the grids and test results are in.

4. In the event that three of the non-adjacent areas fail the test, in order to be

more statistically accurate, the floor may be divided into 40 equal areas. A

maximum of four nonadjacent areas shall be allowed to fail the test. If the

system fails the 40-area test, the system shall be altered to meet the 99 per

cent floor area radio coverage requirement.

5. A test location approximately in the center of each grid area shall be selected

for the test, then the radio shall be enabled to verify two-way communications

to and from the outside of the building through the public agency's radio

communications system. Once the test location has been selected and record-

ed, that location shall represent the entire area. If the test fails in the selected

test location, that grid area shall fail, and prospecting for a better spot within

the grid area shall not be allowed.

6. The gain values of all amplifiers shall be measured and the test measurement

results shall be kept on file with the building owner so that the measurements

can be verified during annual tests. In the event that the measurement results

become lost, the building owner shall be required to rerun the acceptance test

to reestablish the gain values.

7. As part of the installation a spectrum analyzer or other suitable test equipment

shall be utilized to insure spurious oscillations are not being generated by the

subject signal booster. This test shall be conducted at time of installation and

subsequent annual inspections. Provide calibration date of the test equipment.

8. “Alarm reporting” means an SNMP (Simple Network Management Protocol)-

based monitoring system that sends notifications of faults or diminished per-

formance.

9. Appropriate tie-ins means physical and/or virtual connections to Loudoun

County’s public safety communications system as determined by the County.




27 64 10 - 26 11/14

10. “Dedicated communications conduit” means conduit assigned to contain only

the fiber optic cable used for public safety communications.

11. “Dedicated backup power” means a secondary source of power, whether from

battery or emergency generator, supplying automatically when the primary

power source is lost, continuously operational for no less than 12 hours and, if

from a battery, charging itself automatically in the presence of an external

power input;

12. “Donor antenna” means a bi-directional antenna mounted to the roof of a

building interconnected to optical signal conversion and distribution equip-

ment;

13. “Fiber distribution remote unit” means one or more modules capable of con-

verting optical signals into radio frequency signals for distribution to all inter-

connected omni-directional antennas.

14. “Head-end equipment” means one or more modules capable of receiving ra-

dio frequency signals from a donor antenna, amplifying the radio frequency

signals, and converting the radio frequency signals into optical signals for dis-

tribution via fiber optic cable to all fiber distribution remote units throughout

the building;

15. “Omni-directional antenna” means an antenna capable of receiving and

broadcasting radio frequency signals.

B. The minimum qualifications of the system designer, tester and lead installation per-

sonnel shall include:

1. A valid FCC-issued General Radio Operators License; and


organization or school or a certificate issued by the manufacturer of the

equipment being installed.

3. Personnel may be exempt from these requirements upon successful demon-

stration of adequate skills and experience satisfactory to the County Emer-

gency Manager or designee.

3.3 TECHNICAL ASSITANCE AND TRAINING

A. A factory trained technician for the DAS System Trade shall instruct the proper desig-

nated authority on the programming and correct operation of the system after the in-

stallation is completed. Operating manuals and user guided shall be provided at the

time of the training. Provide a minimum of five operating manuals. This instruction

shall be scheduled at the convenience of the staff.

B. The Contractor shall furnish 3 - four (4) hour sessions of in service training with the

system. Operating manuals and user guides shall be provided at the time of the train-

ing. Operating manuals shall be available with training.

C. Final tests and inspection shall be held in the presence of Architect/Engineer’s repre-

sentatives, LCPS Safety and Security Staff and to their satisfaction. The RF-BDA

System Trade shall supply personnel and any required auxiliary equipment for this

test without additional cost.

END OF SECTION 27 64 10

SECTION 27 64 10 DISTRIBUTED ANTENNA SYSTEM (DAS ...

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