
	Where results make sense

Topic: Double sideband reduced carrier transmission

Related Topics

single sideband

vestigial sideband modulation

vestigial sideband

independent sideband

Compatible sideband transmission

single sideband equipment reference level

vestigial sideband transmission

double sideband reduced carrier transmission

single sideband emission

double sideband transmission

double sideband

In the News (Sat 2 Jun 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	Zenith: HDTV
		A low-level pilot is employed for carrier acquisition, a data segment sync for synchronizing the data clock in both frequency and phase, and a data frame sync for data framing and equalizer training.
		In the digital VSB transmission system described here, there is a flexibility of transmitting any one of five different digital VSB modes (2, 4, 8, 8-trellis, and 16), with the data rate dependent upon the number of discrete levels and whether trellis coding is used.
		Carrier recovery in the VSB transmission system is performed using the low-level pilot that is added to the random data signal.
	www.zenith.com /sub_hdtv/hdtv_papers_atsc_system.html (8205 words)

	Transmission system for TV signals on radio links - Patent 4622694
		In the development of devices for the transmission of single sideband AM television signals via radio links, it is desirable to develop a modulation and demodulation scheme which makes it possible to operate with the lowest possible transmitting power which, for single sideband modulation, requires the greatest possible carrier suppression.
		Since one sideband is suppressed and the carrier amplitude is reduced by one half with accurate tuning, the power reduction for harmonic modulation is 33.3% corresponding to - 4.7 dB with reference to the double sideband signal and with a degree of modulation which is 100%.
		Multiplier 57 constitutes a correlator which operates in the double sideband range of the Nyquist filtered signal and whose output signal is fed to the loop filter and amplifier 55.
	www.freepatentsonline.com /4622694.html (2668 words)

	TSCM Handbook - Chapter 5 (continued)
		Double sideband suppressed carrier or simply double sideband is the transmission of both sidebands by an AM transmitter, but without the power consuming carrier.
		The carrier and sidebands are fed into a diplexer which prevents them from interfering with the FM audio transmitter.
		One of the major problems with the transmission of microwaves is the relative ineffectiveness of wire or coaxial cables to carry the AC signal.
	www.dbugman.com /handbook/tscmh5a.html (2787 words)

	Amplitude modulation Summary
		Amplitude modulation (AM) is a form of modulation in which the amplitude of a carrier wave is varied in direct proportion to that of a modulating signal.
		Each sideband is equal in bandwidth to that of the modulating signal and is a mirror image of the other.
		DSBSC and DSBRC signals need their carrier to be regenerated (by a beat frequency oscillator, for instance) to be demodulated using conventional techniques.
	www.bookrags.com /Amplitude_modulation (1573 words)

	Kayak Carrier (Site not responding. Last check: 2007-10-20)
		Reduced-carrier transmission - Reduced-carrier transmission is an amplitude modulation (AM) transmission in which the carrier wave level is reduced to reduce wasted electrical power.
		Suppressed-carrier transmission is a special case in which the carrier level is reduced below that required for demodulation by a normal receiver.
		Double-sideband reduced carrier transmission - Double-sideband reduced carrier transmission (DSB-RC): transmission in which (a) the frequencies produced by amplitude modulation are symmetrically spaced above and below the carrier and (b) the carrier level is reduced for transmission at a fixed level below that which is provided to the modulator.
	carriers.vvvvvv3.com /kayakcarrier.html (603 words)

	Double sideband transmission system - Patent 4176319
		This invention may also be used in reduced carrier double-sideband transmitters; i.e., where the carrier is not fully suppressed but where the carrier is smaller in amplitude than the peak amplitude of the combined upper and lower sideband waves.
		This invention relates to a double-sideband reduced (diminished) or suppressed carrier transmitters, incorporating the basic procedure of providing a separate nonlinear amplification means for the phase modulation component of a double-sideband reduced or suppressed carrier wave and a second path for the envelope modulation component to provide a high efficiency transmitter for said double-sideband waves.
		The frequency of the suppressed carrier at this point is related to the output carrier frequency by a factor of 1/M. In other words, it operates at a sub-harmonic (i.e., exact integral submultiple of another frequency) of the radiated output carrier frequency.
	www.freepatentsonline.com /4176319.html (3823 words)

	Rebuilt Transmission
		Effective transmission rate - In telecommunications, effective transmission rate (average rate of transmission, effective speed of transmission) is the rate at which information is processed by a transmission facility.
		Serial transmission - In telecommunication, serial transmission or sequential transmission is the sequential transmission of the signal elements of a group representing a character or other entity of data.
		Semi-automatic transmission - Semi-automatic transmission, or also known as clutchless manual transmission or automated manual transmission, is a system which uses electronic sensors, processors and actuators to do gear shifts on the command of the driver.
	tr46.goednieuwskrant.com /rebuilttransmission.html (1246 words)

	SIGINT Systems and Products for Digital Signal Analysis
		Type of modulation in which the amplitude of a carrier wave is caused to vary in accordance with the amplitude variations of the information to be transmitted.
		The upper sideband corresponds to the sum of the carrier and modulating frequencies, whereas the lower sideband corresponds to the difference between the carrier and modulating frequencies.
		Modulation in which the frequency of the carrier is caused to vary in an amount proportional to the amplitude of the modulating wave.
	www.signami.com /glossary.html (6049 words)

	transmissionII: airborne
		It is the common method of transmission between a computer and a modem, although the modem may switch to synchronous transmission to communicate with the other modem.
		Transmission in which (a) the frequencies produced by amplitude modulation are symmetrically spaced above and below the carrier and (b) the carrier level is reduced for transmission at a fixed level below that which is provided to the modulato
		Of a transmission medium, its length expressed as a multiple or submultiple of the wavelength of a periodic electromagnetic or electrical signal propagating within the medium.
	www.newmuseum.org /airborne/glossary.html (3952 words)

	Amplitude_modulation - Thagodz Wiki (Site not responding. Last check: 2007-10-20)
		AM works by varying the strength of the transmitted signal in relation to the information being sent, for example, changes in the signal strength can be used to reflect the sounds to be reproduced by a speaker, or to specify the light intensity of television pixels.
		Beginning with Reginald Fessenden's audio demonstrations in the early 1900s, it was also the original method used for audio radio transmissions, and remains in use by some forms of radio communication—"AM" is often used to refer to the mediumwave broadcast band (see AM radio).
		At least two-thirds of the power is concentrated in the carrier signal, which carries no useful information (beyond the fact that a signal is present); the remaining power is split between two identical sidebands, though only one of these is needed since they contain identical information.
	www.thagodz.com /search/wiki/?title=Amplitude_modulation (1827 words)

	NPR 2570.1 - AppendixG
		(Emissions, where the main carrier is directly modulated by a signal which has been coded into quantized form (e.g., pulse code modulation), shall be designated as either an emission in which the main carrier is amplitude-modulated, or an emission in which the main carrier is angle-modulated).
		Carrier is angle-modulated during the period of the pulse.
		Emissions needed for satisfactory functioning of the receiving equipment (such as the carrier in reduced-carrier systems, or a vestigial sideband but not the effect of Doppler) are included in the necessary bandwidths.
	nodis3.gsfc.nasa.gov /displayDir.cfm?Internal_ID=N_PR_2570_0001_&page_name=AppendixG (876 words)

	News \| TimesDaily.com \| TimesDaily \| Florence, AL (Site not responding. Last check: 2007-10-20)
		Since the final RF amplification is now concentrated in a single sideband, the effective power output is greater than in normal AM (the carrier and redundant sideband account for well over half of the power output of an AM transmitter).
		To recover the original signal from the IF SSB signal, the single sideband must be frequency-shifted down to its original range of baseband frequencies, by using a product detector which mixes it with the output of a beat frequency oscillator (BFO).
		A vestigial sideband (in radio communication) is a sideband that has been only partly cut off or suppressed.
	www.timesdaily.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=vestigial_sideband (1521 words)

	Speedmaster Reduced
		Reduced enamel epithelium - The reduced enamel epithelium, sometimes called reduced dental epithelium, overlies a developing tooth and is formed by two layers: a layer of ameloblast cells and the adjacent layer of cuboidal cells from the dental lamina.
		As the cells of the reduced enamel epithelium degenerate, the tooth is revealed...
		Reduced gas - A reduced gas is a gas with a low oxidation number (or high reduction), and is usually hydrogen-rich.
	om65.teltopaz.com /speedmasterreduced.html (864 words)

	Double Stroller with Infant Carrier
		In cultures around the world, parents' arms are used to comfort their babies, from holding double stroller with infant carrier and carrying them to rocking them to sleep.
		Our overreliance on infant carriers, strollers, swings, double stroller with infant carrier and cribs as parenting substitutes often prevents us from attaining physical closeness with our children, causing increased fussiness in infants double stroller with infant carrier and creating conflict for the mothers.
		Double-sideband suppressed-carrier transmission - Double-sideband suppressed-carrier transmission (DSB-SC): transmission in which (a) frequencies produced by amplitude modulation are symmetrically spaced above and below the carrier frequency and (b) the carrier level is reduced to the lowest practical level, ideally completely suppressed.
	re47.twentytank.com /doublestrollerwithinfantcarrier.html (647 words)

	DDR-5K Diversity Receiver
		One sideband is modulated with intelligence 'A' and the other sideband is modulated with intelligence 'B'; An example, one side band might carry a tone shifted (AFSK) signal while the second sideband might carry a voice channel.
		Instead of completely canceling the carrier at the balanced modulator, a little of it is allowed to remain in the transmitted signal.
		It could be heard on a superhet receiver in CW mode and the receiving operator had to zero beat against the reduced carrier to obtain an intelligible signal.
	www.jproc.ca /rrp/coverdale_ddr5k.html (772 words)

	Amplitude Modulation - HamWiki -- Ham Radio's Wiki Elmer (Site not responding. Last check: 2007-10-20)
		The output of this process is a signal with the same frequency as the carrier but with peaks and troughs that vary in proportion to the strength of the modulating signal.
		Its output is a signal at the carrier frequency, with peaks that trace the Amplitude of the unmodulated signal.
		In practice, a Capacitor is used to undo the DC shift introduced by the Transmitter and to eliminate the Carrier frequency by connecting the signal peaks.
	www.hamwiki.info /wiki/Amplitude_Modulation (1217 words)

	Transmission Flush
		The sanitation technologies covered in detail are VIP latrines, pour-flush toilets, septic tanks, settled sewerage transmission flush and simplified sewerage, with additional chapters on sullage disposal, pit emptying, transmission flush and sewage treatment transmission flush and reuse.
		Sociocultural constraints on sanitation systems transmission flush and their socioeconomic costing are described, together with hygiene education, which is essential in order to achieve maximum benefits to health.
		Transmission Time Interval - TTI, Transmission Time Interval, is a parameter in UMTS (and other digital telecomunication networks) related to encapsulation of data from higher layers into frames for transmission on the radio link layer.
	tr46.goednieuwskrant.com /transmissionflush.html (1038 words)

	Yenra Glossary D (Site not responding. Last check: 2007-10-20)
		Reducing the amount of storage space required to store a given amount of data, or reducing the length of message required to transfer a given amount of information.
		In a data station, the equipment that performs functions, such as signal conversion and coding, at the network end of the line between the data terminal equipment (DTE) and the line, and that may be a separate or an integral part of the DTE or of intermediate equipment.
		diversity transmission - Radio communication using a reception technique in which a resultant signal is obtained by combining signals that originate from two or more independent sources that have been modulated with identical information-bearing signals and that may vary in their transmission characteristics at any given instant.
	www.yenra.net /glossary/d.html (12166 words)

	Radio, AM, FM, Sidebands and Bandwidth (Site not responding. Last check: 2007-10-20)
		The bandwidth of an AM signal is double the highest audio frequency modulated onto the carrier.
		When music and speech are transmitted, many frequencies are modulated onto the carrier and the sidebands look more like this, varying rapidly as the content of the broadcast changes.
		Removing the carrier makes the transmitter more efficient but the bandwidth is not reduced.
	www.softwareforeducation.com /electronics/notes/A2/Radio/am-bandwidth.htm (372 words)

	Muncie Transmission (Site not responding. Last check: 2007-10-20)
		This is because the transmisson line theory has found new muncie transmission and important applications in the area of high-speed VLSI interconnects, while it has retained its significance in the area of power transmission.
		The unique muncie transmission and distinct feature of the proposed book is that it will present systematic, comprehensive, muncie transmission and in-depth analysis of transmission lines with nonlinear loads.
		Transmission Tower Hesselberg - The Transmission Tower Hesselberg is a 119 metre high tower used for FM- and TV transmission and for directional radio at 10Â°32' E and 49Â°04' N on the Hesselberg near WassertrÃ¼dingen, Bavaria, Germany.
	mu9.3rdfaze.info /muncietransmission.html (1037 words)

	SE-3 Synchronous AM Detector
		Carrier nulls (fades) of 20 to 30 dB or more are common, which result in total loss of intelligibility.
		Under these conditions, the desired signal has become a double-sideband reduced-carrier transmission which cannot be detected in the normal manner.
		The BFO in the SE-3 is locked to transmitted signal's carrier, and then completely replaces it in the detection process.
	www.sherweng.com /indepth.html (828 words)

	The Dispatch - Serving the Lexington, NC - News (Site not responding. Last check: 2007-10-20)
		As originally developed for the electric telephone, amplitude modulation was used to add audio information to the low-powered direct current flowing from a telephone transmitter to a receiver.
		This analysis also shows that the transmission bandwidth of AM is twice the signal's original (baseband) bandwidth — since both the positive and negative sidebands are 'copied' up to the carrier frequency, but only the positive sideband is present originally.
		The various suppression methods in Forms of AM, can be seen clearly in the figure — with the carrier suppressed there will be no impulses and with a sideband suppressed, the transmission bandwidth is reduced back to the original, baseband, bandwidth — a significant improvement in spectrum usage.
	www.the-dispatch.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=amplitude_modulation (1657 words)

	SSB Q-Channel Communications
		Receiving single sideband signals while using advanced synchronous demodulation of symmetrical double sideband [DSB] modulated signals, such as AM, PM, or FM, is at the heart of this operating system.
		The locally generated synthetic r-f carrier [VCO] is phase locked to signals that we do NOT wish to hear, by locking it with the information derived from the symmetrical [mirrored] sidebands of the transmitted signal, instead of its carrier.
		When the sidebands of the received r-f signal become completely non-symmetrical, such as exists when receiving a single sideband [SSB] signal, no dc-error voltage is available at this test point to automatically control the local r-f oscillator.
	www.antennex.com /preview/Folder01/Nov4/ssb-q.htm (2522 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		] Amplitude modulation in which the modulated wave is composed of a carrier, an upper sideband whose frequency is the sum of the carrier and modulation frequencies, and a lower sideband whose frequency is the difference between the carrier and modulation frequencies.
		] A form of amplitude modulation in which both the upper and lower sidebands are transmitted but the power contained in the unmodulated carrier is reduced to a fixed level below that provided to the modulator.
		] The transmission of a modulated carrier wave accompanied by both of the sidebands resulting from modulation; the upper sideband corresponds to the sum of the carrier and modulation frequencies, whereas the lower sideband corresponds to the difference between the carrier and modulation frequencies.
	www.accessscience.com /Dictionary/D/D29/DictD29.html (1689 words)

	Section
		For a given class of emission, the minimum value of the occupied bandwidth sufficient to ensure the transmission of information at the rate and with the quality required for the system employed, under specified conditions.
		Emissions useful for the good functioning of the receiving equipment as, for example, the emission corresponding to the carrier of reduced carrier systems, shall be included in the necessary bandwidth.
		Telegraphy, single sideband reduced Bn=central frequency+M+DK, M=B/2 15 channels; highest central frequency is: 2805 2K89R7B carrier.
	edocket.access.gpo.gov /cfr_2004/octqtr/47cfr2.202.htm (1401 words)

	[No title]
		Examples of this mode are: 1) Carrier keyed on/off 2) carrier on with the modulation keyed on/off 3) carrier on with the modulation frequency shift keyed.
		This is used by short wave broadcast station studios to transmitter links with seperate programs on each set of sidebands.
		VSB = Vestigal sidebands where all of one set of side- bands is transmitted but only about 20 percent of the other set of sidebands is transmitted (the lowest frequencies).
	packetstormsecurity.nl /apoc2k/ufo/classfcc (177 words)

	Emission Designations
		Emission classifications provide an internationally recognised standard in which to specify accurately and concisely, the significant characteristics of a transmission.
		The first four give details of the bandwidth needed, the next three are the basic characteristics of the emission and the last two (optional) give any extra details which might be needed to further describe the emission.
		The next describes the nature of the signal modulating the carrier and the third describes the type of information being transmitted.
	www.vkham.com /emmiss.html (250 words)

Try your search on: Qwika (all wikis)