ARMY UFGS-27 53 19.13

NOTE: Modify scope to clearly include desired capabilities of the distributed antenna system.

NOTE: Types of DAS are generally classified into three different categories. These categories are passive DAS, active DAS, and hybrid DAS. Coupling two solutions together in the same space or facility is not recommended because they could interfere with each other.

NOTE: Passive DAS is typically used for buildings 125,000 square feet or less and in a building that does not have a large amount of metal, masonry, or concrete wall materials that block the RF signals. Passive DAS uses only coaxial cable to distribute the signals. It is the smallest, simplest, and often the least expensive DAS solution. Passive DAS is inherently limited in bandwidth and is only suitable for very small service frequency requirements. A Passive DAS is only allowed were permitted by the using military departnemt and is not allowed in military medical facilities.

NOTE; Active DAS is a solution used for larger spaces and spaces with more barrier materials that block the RF signals from traveling through the interior space. Active solutions use fiber optic cabling which changes the RF signals into light for distribution, and then back into usable signals at the desired locations. An active DAS is the preferred solution for military medical facilities. Specify an active system for all medical facilities.

NOTE: A hybrid DAS solution includes a combination of both active and passive DAS. Do not specify a hybrid DAS solution.

a. This work includes design and providing a new, complete, [passive] [active] distributed antenna system (DAS) as required and as described herein for the [building name]. Provide a turnkey system capable of receiving, processing, and transmitting indicated radio signals including the system wiring, raceways, pull boxes, terminal cabinets, outlet and mounting boxes, control equipment, active components, passive components, mounting hardware and other accessories and miscellaneous items required for a complete operating system even though each item is not specifically mentioned or described. Provide system[s] complete and ready for operation. See paragraph titled SYSTEM DESCRIPTION for additional requirements.

b. Provide equipment, materials, installation, workmanship, inspection, and testing in strict accordance with the required provisions of NFPA 72 [and NFPA 1221].

[c. The system layout on the drawings show the intent of coverage and are shown in suggested locations. Submit plan view drawing showing all component locations, cable routing, junction boxes, other related equipment, conduit routing, and wire counts for all floors.]

NOTE: Include project specific frequencies in the brackets.

d. Provide a DAS capable of receiving, processing, and transmitting first responder[, military and local emergency medical services (EMS), ][radio paging,] [and ][required [UHF][and VHF]] frequencies. Provide initial system capable of processing services of frequencies from [_____] to [_____]. Provide a system that is upgradeable to allow future additional frequencies as required by NFPA 1221.

e. Provide letters of permission for all used frequencies for which the Government does not already have a license.

Edition:

20

Published:

05/01/2020

Number of Pages:

33

File Size:

1 file , 100 KB