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Author: Washington (State). Department of Highways
Publisher:
ISBN:
Category : Radiotelephone
Languages : en
Pages : 23
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Author: Washington (State). Department of Highways
Publisher:
ISBN:
Category : Radiotelephone
Languages : en
Pages : 23
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Author:
Publisher:
ISBN:
Category : Mobile communication systems
Languages : en
Pages : 0
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The Highway Department owns and operates a radio system consisting of a network of stations at fixed locations together with mobile units installed in maintenance vehicles. This radio operating procedure manual is designed to promote efficient use of the Statewide radio system in accordance with Federal Communications Commission (FCC) regulations.
Author: United States. National Highway Traffic Safety Administration
Publisher:
ISBN:
Category : Communication in emergency medicine
Languages : en
Pages : 182
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 180
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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In the South Carolina State Guard (SCSG), we have a Division Communications Section, and each Brigade has a Communications Section. Division operates a communications bus with 800 MHz radios primarily designed for interface with statewide Public Service communications. At First Brigade, we decided to concentrate our efforts on a more localized theater of operations, but expandable when required to cover state-wide and even world-wide communications. Modern radio communications systems, including cellular telephones, depend on a complex system of multiple radio towers with computer control over the total system. A breakdown in any part of the systems risks the loss of the total system. These systems are also extremely expensive, with each portable radio in the range of $1,000 and the central control station costing 100 times as much. The 1st Brigade, SCSG, has begun planning for communications needs after an event that could involve the loss of any or all of the systems currently used by Public Safety in the state. We are planning for a disaster at least as severe as Hurricane Katrina, involving the loss of commercial electrical power, the loss of most, if not all, functioning radio systems, and impassable roads. With no commercial power available, all radios would have to be battery operated, and use both rechargeable and disposable batteries easily and cheaply available on the local market. These radios would also have to be easy to operate, and the operators not required to have licenses. We selected radios operating in the GMRS (General Mobile Radio Service) 450 MHz band, for which the FCC will issue a 5-year license covering six radios for $75. These radios provide reliable communications up to 5 miles. Since longer range would also be required, the SCSG found a repeater that was man portable and that extended the range of the hand-held radios up to 30 miles. They also formed an amateur radio club and obtained an FCC license for very long-range communications.
Author:
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Category : Traffic safety
Languages : en
Pages : 906
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Author: Colorado. Office of State Auditor
Publisher:
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Category : Broadcast data systems
Languages : en
Pages : 70
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Author: Nevada. Legislature. Legislative Commission
Publisher:
ISBN:
Category : Mobile communication systems
Languages : en
Pages : 44
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Author: Herbert L. Krauss
Publisher: John Wiley & Sons
ISBN: 047103018X
Category : Technology & Engineering
Languages : en
Pages : 561
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Book Description
A comprehensive text that covers both receiver and transmitter circuits, reflecting the past decade's developments in solid-state technology. Emphasizes design using practical circuit elements, with basic ideas of electrical noise, resonant impedance-matching circuits, and modulation theory thoroughly explained. Contains the latest techniques in radio frequency power amplifier design, accepted state-of-the-art technology based on bipolar junction transistors, VMOS RF power FETs, high-efficiency techniques, envelope elimination and restoration, envelope feedback, and other newly emerging technologies. Requires a knowledge of complex algebra, Fourier series, and Fourier transforms. Also includes numerous worked-out examples that relate the theory to practical circuit applications, and homework problems keyed to corresponding sections of the text.
Author: United States. Congress. House. Committee on Homeland Security. Subcommittee on Emergency Preparedness, Science, and Technology
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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