Is 800 MHz a high frequency?
In the United States, the frequencies used for these systems may be grouped into four general bands or ranges: low-band VHF (49-108 MHz), high-band VHF (169-216 MHz), low-band UHF (450-806 MHz), and high-band UHF (900-952 MHz). VHF represents “Very High Frequency” while UHF represents “Ultra High Frequency.”
What operates at 900mhz?
Currently, the entire 900 MHz band is designated for narrowband private land mobile radio communications and it has been primarily used for two-way dispatch radio communications by land transportation, utility, manufacturing, and petrochemical companies.
Is 800 MHz safe?
At a Public Safety event in Washington, D.C., International Association of Fire Chiefs President Ernest Mitchell stated, “The problem of radio interference at the 800 megahertz level is serious. Thankfully, by our measure no one has died as a result of this interference.
What band is 850 MHz?
In many countries, n5 (850MHz), or commonly referred to as the 850 MHz 5G band, is a commonly tested and deployed 5G frequency. The n5 band’s popularity is due to its relatively common availability, already widely in use by 3G and 4G networks.
Do police use VHF or UHF?
/800 MHz UHF
Police radios operate in a 700/800 MHz UHF band. This gives them a considerable amount of range which is pretty good in urban areas. The P25 radio systems give an improved range for officers.
How far can 900 MHz travel?
The lower frequency radio waves of 900 MHz radios provide greater penetration through walls, trees and other obstacles, making it optimal for most non-line-of-sight applications. A typical AW900xTR Radio using high powered AW-15 15dbi antenna can go distances of up to 1500 feet with buildings and/or trees in the way.
Is 900 MHz a line of sight?
The 900MHz Wireless Bridge System is a complete bridge solution for any application where a clear line of sight is not possible or where higher frequency network equipment has failed.
What frequency is harmful to humans?
300 MHz to 3 GHz
Scientific evidence suggests that cancer is not only linked to mobile phone radiation and that other factors also may be involved in its development. Most mobile operators use from radiofrequency waves in the range up 300 MHz to 3 GHz that can be harmful for human health (1).
What is the 800 MHz band used for?
The 800 MHz band is also home to commercial wireless carriers and private radio systems. To address a growing problem of harmful interference to 800 MHz public safety communication systems caused by high-density commercial wireless systems, the Commission in July 2004 adopted a comprehensive plan to reconfigure the band.
What is the Delaware 800 MHz digital trunked radio system?
On October 15, 1993 the State of Delaware purchased a Statewide 800 MHz Digital Trunked Radio System to provide statewide communications for all state, county and municipal government agencies, fire and emergency medical services, and a select number of federal agencies.
How does the city of Wilmington’s 800 MHz system work?
The system design incorporates a digital microwave (6 & 10 GHz) infrastructure, which links the three sub-systems and the intra-county system sites together. To enhance operational capabilities the City of Wilmington’s 800 MHz system was also modified to provide limited interoperability between the State’s system and the City’s system.
What frequency do public safety radios use?
Land Mobile Radio for Public Safety. Public safety radio systems (such as those used by police, firefighters and emergency medical technicians) operate in several portions of the 800 MHz band, which consists of spectrum at 806-824 MHz paired with spectrum at 851-869 MHz.