
	Where results make sense

Topic: FM broadcast band

Related Topics

Federal Standard 1037C

FM blanketing

In the News (Sat 2 Jun 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	FM broadcast band - Wikipedia, the free encyclopedia
		This was prompted by the expansion of broadcasting and the modernisation of existing transmission networks, using new or second-hand transmitters from western countries, together with a general desire for standardisation with the West.
		The future of broadcasting on the OIRT FM band is limited, due to the lack of new consumer receivers for that band.
		Operators on this band and the 6 metre (50 MHz) band use the presence of broadcast stations as an indication that there is an "opening" into Eastern Europe or Russia.
	en.wikipedia.org /wiki/FM_broadcast_band (1082 words)

	FM broadcasting - Wikipedia, the free encyclopedia
		FM radio is a broadcast technology invented by Edwin Howard Armstrong that uses frequency modulation to provide high-fidelity sound over broadcast radio.
		Random noise has a 'triangular' spectral distribution in an FM system, with the effect that noise occurs predominantly at the highest frequencies within the baseband.
		This in-band on-channel approach results in highly-compressed audio, and blocks any opportunity for new stations to broadcast.
	en.wikipedia.org /wiki/FM_radio (775 words)

	Fanfare FM - Improve your FM reception with "Rediscover FM Stereo"
		In contrast, FM broadcast band signals are not usually bothered by signals from distant stations on the same frequency.
		As you have already gathered, the factors affecting FM reception most, aside from the FM tuner are; (a) the type of antenna used, (b) its height above the ground, and (c) the location of the antenna in relation to surrounding obstructions.
		About this the antagonists once said 'The poor quality of FM broadcasting in North America did not warrant any special consideration of the tuner's fidelity specifications.' At the same there were just as many detractors for the records, tapes and compact discs.
	www.fanfare.com /rfms-bk.html (4059 words)

	Band (radio) \| Topic Definition \| Find the Meaning and Define the Answer of Band (radio) (Site not responding. Last check: 2007-09-07)
		A band is a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose.
		FM broadcast band (88~108 MHz, except 76~90 in Japan)
		Each of these bands has a basic bandplan which dictates how it is to be used and shared, to avoid interference and to set protocol for the compatibility of transmitters and receivers.
	www.thefreeencyclopedia.com /definition/word.aspx?w=Band_(radio) (193 words)

	Stephen Dunifer
		A station employing frequency modulation in the FM broadcast band and licensed primarily for the transmission of radio-telephone emissions intended to be received by the general public.
		FM broadcast stations employing transmitters installed or type accepted before January 1, 1960, must achieve the highest degree of compliance with these specifications practicable with their existing equipment.
		All FM broadcast stations must meet the requirements of 73.317 b-d regarding emissions beyond the carrier frequency.
	home.neo.rr.com /radiofreecanton/archives/documents/stephen_dunifer.htm (1543 words)

	FM Antennas (Site not responding. Last check: 2007-09-07)
		The FM broadcast signal is VHF (very high frequency) in nature and generally can only be received within a distance known as "line of sight"...
		Without hills, mountains, or buildings to impede its progress, an FM phenomenon commonly known as "diffraction" causes the FM broadcast signal to conform to the curvature of the earth for a distance of approximately 30 miles beyond normal line of sight.
		To complicate matters, multipath signals in an FM urban environment are generally received from almost the same direction (in the horizontal plane); even a directional outdoor antenna with its horizontal angular discrimination is often incapable of separating the desired direct path signal from this vertically oriented multipath interference.
	www.gcaudio.com /resources/howtos/antenna.html (1392 words)

	Apparatus and method for providing digital audio in the cable television band - Patent 5293633 (Site not responding. Last check: 2007-09-07)
		FM (audio) broadcasting over cable has never achieved significant success for two technological reasons: signal quality is poor and there has been no way to collect revenue or control the access to the service.
		In accordance with the present invention, a method and apparatus are provided for transmitting, receiving, and reproducing digital audio signals as discrete carriers frequency allocated as standard FM broadcast signals or as narrowband signals in nontelevision signal portions of the cable frequency spectrum.
		In one signal path, the FM detector detects the audio component of the incoming signal and provides such as an AF signal to a stereo demultiplexer 434 (for stereo broadcasts), the output of which is provided to a digital or analog switch 436 as left and right audio channel signals.
	www.freepatentsonline.com /5293633.html (6224 words)

	FCC and the LAW Page
		On the FM broadcast band you are not allowed to transmit a signal that would cause a field strength greater than 250 microvolts (uV) at a distance of 3 meters from the antenna.
		It is the sole responsibility of the builder-user of any FM broadcast-band device to research and fully avoid any and all interference to licensed FM broadcast transmission and reception.
		In the latter case the FCC rarely goes after the broadcaster for the fine and the whole matter is dropped.
	www.mycal.net /old/projects/mpr/fcclaw.htm (1025 words)

	Apparatus and method for providing digital audio in the FM broadcast band - Patent 5038402
		The digitized audio signal is modulated using multiphase or multilevel amplitude or frequency modulation of the carrier in the FM broadcast band.
		The digitized audio source material is provided to an FM band exciter 36 which provides the digitized audio source material as a radio frequency (RF) signal to the cable 14.
		The output of a carrier oscillator 210, operating in the FM band, is split by a splitter 211 and provided, in one instance, to one of the mixers 209, and in another instance is phase shifted 90 degrees by a phase shifter 212 prior to being provided to the other mixer 208.
	www.freepatentsonline.com /5038402.html (6100 words)

	Introduction
		However, with respect to FM the Commission is prepared to assign to it that portion of the spectrum which is shown to be best suited to its requirements.
		Broadcasters, having already been burnt once by a new technology the public ultimately didn't accept, were reluctant to throw their financial support into yet another new and unproven service.
		FM DXing - Life would be terribly dull for the FM DXer had the FCC of 1945 been absolutely correct in its belief that the 88-108 MHz portion of the radio spectrum was the best place for the new FM broadcast band.
	www.dxfm.com /Content/intro.htm (2718 words)

	Ramsey Electronics
		For some frequency bands, the FCC sets 100 milliwatts (0.1 watt) as the maximum permitted power output for unlicensed, home-built transmitting devices, and that the combined length of your antenna and feedline (coaxial cable or other) must not exceed 10 feet.
		Broadcasting on the grounds of a school using the AM broadcast band is specifically permitted and encouraged between 525 and 1705 KHz under Part 15.221.
		The most specific FCC regulation of 88-108 MHz FM Broadcast band unlicensed operation is that the "field strength" of the signal must not exceed 250 microvolts/meter at a distance of 3 meters from the transmitter (FCC rule 15.239).
	www.ramseyelectronics.com /resource?page=fcc (2979 words)

	FM broadcast band - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-09-07)
		The name "FM band" is usually used but is slightly misleading, as one can transmit FM on any frequency.
		Some, like Italy, allow a station on any 50 kHz boundary where it can be squeezed in.
		This offset helps to prevent interference, and take advantage of FM's capture effect and receiver selectivity.
	shoreview.us /project/wikipedia/index.php/FM_band (668 words)

	The KA7OEI FT-817 pages - About the receiver
		At AM broadcast band frequencies this sort of filtering isn't too hard to manage, but at 2 meters or 440 MHz, trying to filter a signal that is only 2 MHz away requires complicated and/or expensive filtering: Filtering something that is over 136 MHz away is easy - even at 440 MHz.
		Anyway, the "AM band" lowpass filter is used only when receiving on the AM broadcast band and the manufacturer had little reason to spend much money and go overboard with filtering - especially when the images land in a frequency range normally devoid of strong signals.
		What this means is that the FM broadcast band receiver is very prone to strong signal overload - something that can't help but be noticed in strong signal urban areas - especially when using a large antenna.
	www.ussc.com /~turner/ft817_rcv.html (3350 words)

	Articles - Very high frequency (Site not responding. Last check: 2007-09-07)
		FM stations from Miami, Florida; New Orleans, Louisiana; Houston, Texas and even Mexico were heard for hours in central Illinois during one such event.
		Other stations, including a variety of pay and regional free-to-air stations, broadcast their programmes using the UHF band since the VHF band is very overloaded with four stations sharing a very small frequency band.
		In some countries, particularly the United States and Canada, limited low-power license-free operation is available in the FM broadcast band for purposes such as microbroadcasting and sending output from CD or digital media players to radios without auxiliary-in jacks, though this is illegal in some other countries, most notably the United Kingdom.
	www.ezorange.com /articles/VHF (921 words)

	Band II FM DX in the UK (Site not responding. Last check: 2007-09-07)
		Welcome to Band II FM DX in the UK This website is dedicated to providing information to people who are just beginning to participate in the hobby of radio DXing.
		This block of frequencies is usually referred to as the FM broadcast band.
		modes known as Tropospheric Enhancement and Sporadic E (Es), whereas the local FM stereo reception you enjoy everyday as you drive to and from work arrives via Groundwave and doesn't normally qualify as DX because it is delivered to your radio from tall transmitter masts located in the immediate vaccinity.
	www.fmdx.info (801 words)

	Radios for the old 45MHz FM broadcast band
		FM receivers will capture a signal that is a few dB stronger than another co-channel signal, without the weaker signal causing interference.
		Note that the FM band on this set is the old 45MHz band, and that the normal AM band is also present.
		This FM is narrowband FM, the old broadcast FM was wideband similar to that of the modern 100MHz FM broadcast band.
	www.geocities.com /CapeCanaveral/9178/radios/fm45.html (1626 words)

	New Fanfare FM2G -C "College Band" FM Antenna
		The FM2G-C was designed to concentrate on the area of FM broadcast band that is home to most NPR radio stations and all non-profit(NPE), private radio stations.
		Most FM broadcast band antennas are tuned to concentrate on the middle of the FM band which is 100MHz.
		However, the College Band is situated at the bottom end off the FM band which, unfortunately is at the outer end of the range for most FM antennas.
	www.fanfare.com /fm-2g-c.html (424 words)

	ipedia.com: Shortwave Article (Site not responding. Last check: 2007-09-07)
		Numbers stations are shortwave radio stations of uncertain origin that broadcast streams of numbers, words, or phonetic sounds.
		The development of direct broadcasts from satellites has reduced the demand for shortwave receivers, but there are still a great number of shortwave broadcasters.
		John Cage employed shortwave radios as live instruments in a number of pieces, and other musicians have sampled broadcasts, used tape loops of broadcasts, or drawn inspiration from the unusual sounds on some frequencies.
	www.ipedia.com /shortwave.html (862 words)

	Antenna Tower - Lutz Community Radio (Site not responding. Last check: 2007-09-07)
		In addition to FM broadcast band antennas, it supported antennas for six amateur radio bands.
		The lower outrigger support for a ten element FM broadcast band collinear can be seen in the foreground.
		A 6-element FM broadcast band beam was near the top.
	www.criminalgovernment.com /pix/tower.html (140 words)

	AM Broadcast Band DX
		The easiest AM broadcast stations to log are the 50,000-watt powerhouse stations operating on what once were clear-channel frequencies (the aforementioned WWKB 1520 in Buffalo is a good example).
		A good idea if you want to DX the AM band is to sit down during the afternoon and tune from one end of the band to the other noting what local stations you can hear.
		If you're going to DX the AM broadcast band it helps to bear in mind that while all U.S. stations are spaced in 10 kilohertz steps, the ones over in Europe are spaced 9 khz apart.
	www.qsl.net /kc2fng/amdx.html (1336 words)

	40W No Tune FM Broadcast Power Amplifier Design
		To boost the output power of low power FM broadcast band exciters, a number of these are available commercially, both as kits and ready made.
		As an example of an application for this amplifier I used the Broadcast Warehouse 1W FM LCD PLL Exciter to drive the 40W broadband amplifier.
		The Broadcast Warehouse exciter incorporates an out of lock RF shutdown facility, used during PLL reprogramming so that RF is not generated until frequency lock has been regained.
	www.irational.org /sic/radio/40w-no-tune-amp.html (5129 words)

	SCFM series FM Broadcast Antennas, antenna configuration,circular polarization,mono stereo signals, conurbations and ...
		The SCFM series FM Broadcast Antennas operate at D.C. ground for protection against lightening and immunity to noise.
		The SCFM series FM Broadcast Antennas are supplied with dismantled dipole arms for easy handling and transportation and are assembled at site with simple hand tools.
		With Bipolar structure and absence of parasitic elements, SCFM series FM Broadcast Antennas guarantee a uniform radiation pattern over 360 degrees in horizontal plane, practically circular polarization with a variation of less than +/- 2 dB.
	www.starantenna.com /fm_broadcast_antenna.htm (294 words)

	VHF tracking receiver and Aircraft band receiver
		A superregenative receiver developed for tracking small FM transmitters but also tunes the aircraft band and the top portion of the FM broadcast band.
		It can also be used to listen in on aircraft and control tower communications and the top of the FM broadcast band down to about 105 MHz.
		This is usually the case when tuning FM broadcast band stations.
	www.jbgizmo.com /page23.html (1659 words)

	AM/FM DXing
		One of the easiest parts of the radio spectrum to explore are the broadcast bands.
		The VHF-FM broadcast band in the United States extends from 88 to 108 megahertz.
		Broadcast band DXing is an exciting way to hear the sounds of cities and towns around the nation and even around the world.
	www.lerc.nasa.gov /WWW/MAEL/ag/agprop4.htm (3878 words)

	FM Broadcast Frequencies (Site not responding. Last check: 2007-09-07)
		Within the United States, the FCC has allocated 100 channels within the FM broadcast band.
		FM broadcast radio supports "stereophonic" (Left and Right channels) operation with each channel able to transmit signals in the range of 50 Hz to 15 KHz.
		Harmonic distortion may be up to 3.5 percent (50 - 100 Hz).
	telecom.tbi.net /fmfreq.html (61 words)

	FM Query -- FM Radio Technical Information -- Audio Division (FCC) USA
		Search for radio station information in the FM broadcast band (88 MHz to 108 MHz).
		Please refer any comments or suggestions on the FM Query to Dale Bickel, dale.bickel@fcc.gov.
		Only FM records with current engineering data will be retrieved.
	www.fcc.gov /mb/audio/fmq.html (518 words)

Try your search on: Qwika (all wikis)