Search results
Results From The WOW.Com Content Network
Since radio waves are the lowest frequency category of electromagnetic waves, there is no lower limit to the frequency of radio waves. [4] Radio waves are defined by the ITU as: "electromagnetic waves of frequencies arbitrarily lower than 3000 GHz, propagated in space without artificial guide". [5] At the high frequency end the radio spectrum ...
Sources differ on the exact frequency range of the band. For example, the Swiss Federal Office of Communications, [1] the Broadcast engineer's reference book [2] and Ericsson India Ltd [3] all define the range of Band IV from 470 to 582 MHz. An EICTA paper [4] defines the range as 474 to 602 MHz, whilst the BBC define the range as 470 to 614 ...
The launch of Radio 5 on 27 August 1990 saw the removal of Open University, schools programming, children's programmes and the Study on 4/Options adult education slot from Radio 4's FM frequencies. Consequently, the full Radio 4 schedule became available on FM for the first time. However, adult educational and Open University programming ...
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency [1] range from around 20 kHz to around 300 GHz.
Specific frequency allocations vary from country to country and between ITU regions as specified in the current ITU HF frequency allocations for amateur radio. [1] The list of frequency ranges is called a band allocation, which may be set by international agreements, and national regulations. The modes and types of allocations within each ...
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
Pages in category "Lists of radio stations by frequency" The following 200 pages are in this category, out of approximately 338 total. This list may not reflect recent changes .
U-NII-4 is presently only usable for Dedicated Short Range Communications Service (DSRC) and licensed amateur radio operators. In 2007, the FCC began requiring that devices operating in channels 52, 56, 60 and 64 must have Dynamic Frequency Selection (DFS) capabilities. This is to avoid communicating in the same frequency range as some radar.