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Two small towers may be less intrusive, visually, than one big one, especially if they look identical. Towers look less ugly if they and the antennas mounted on them appear symmetrical. Concrete towers can be built with aesthetic design considerations. They are sometimes built in prominent places and include observation decks or restaurants.
A vehicle inspection, e.g., an annual inspection, is a necessary inspection required on vehicles to conform with laws regarding safety, emissions, or both. It consists of an examination of a vehicle's components, usually done by a certified mechanic.
A public file (or public inspection file) is a collection of documents required by a broadcasting authority to be maintained by all broadcast stations under its jurisdiction. Such a file is required by the Federal Communications Commission (FCC) in the United States , and by the Canadian Radio-television and Telecommunications Commission (CRTC).
A wireless site survey, sometimes called an RF (Radio Frequency) site survey or wireless survey, is the process of planning and designing a wireless network, to provide a wireless solution that will deliver the required wireless coverage, data rates, network capacity, roaming capability and quality of service (QoS). [1]
The Antenna Interface Standards Group (commonly referred to as AISG) is a non-profit international consortium formed by collaboration between communication infrastructure manufacturers and network operators with the purpose of maintaining and developing a standard for digital remote control and monitoring of antenna line devices in the wireless industry. [1]
A tower array is an arrangement of multiple radio towers which are mast radiators in a phased array. [1] They were originally developed as ground-based tracking radars. [2] Tower arrays can consist of free-standing or guyed towers or a mix of them. Tower arrays are used to constitute a directional antenna of a mediumwave or longwave radio station.
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There are typically several volumes, including supplements for weapons systems, performance charts, servicing checklist, and post maintenance functional checkflight checklist. Pocket checklists (or "PCL") contain pertinent extracts from the main publications necessary to normal operations, emergency procedures, and training.