
	Where results make sense

Topic: Psophometric voltage

Related Topics

Balance return loss

Frame slip

Kalman filter

Radio equipment

Teleconference

FM improvement factor

FM improvement threshold

CCITT

Optical density

Catechism of the Catholic Church

Millibar

Computer conferencing

Category 4

Efficiency factor

Glossary of fax terms

In the News (Mon 30 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Psophometric voltage
		Psophometric voltage is a circuit noise voltage measured with a psophometer that includes a CCIF-1951 weighting network[?].
		Note 1: "Psophometric voltage" should not be confused with "psophometric emf," i.e.
		For practical purposes, the psophometric emf is twice the corresponding psophometric voltage.
	www.ebroadcast.com.au /lookup/encyclopedia/ps/Psophometric_voltage.html (71 words)

	Telcom - The Rectifying Power Supply I50
		The rectifying power supply I50 is designed to supply Telecommunication Systems with DC voltage -48V and maximum current of 50 A. The system consists of up to five rectifiers IM10 with nominal current of 10 A. The system is modular and the units are disposed in the adequate IR50 rack.
		The output DC voltage is distributed to the load in DC distribution JD50.
		According to the adjust parameters of the batteries, the current to the batteries is limited and float and boost voltage depend of ambient temperature.
	www.telcom.co.yu /english/i50.html (153 words)

	Line Voltage Thermostat
		An example of a disturbance voltage is a voltage that produces (a) false signals in a telephone, (b) noise in a radio receiver, or (c) distortion in a received signal.
		In telecommunication, a longitudinal voltage is a voltage induced or appearing along the length of a transmission medium.
		While generally referred to as a voltage spike, the phenomenon in question is actually a power spike, in that it is measured not in volts but in joules.
	www.frozenup.com /pages9/51/line-voltage-thermostat.html (819 words)

	Voltage
		An example of a disturbance voltage is a voltage that produces (a) false signals in a telephone, (b) noise in a radio receiver, or (c) distortion in a received signal.
		In telecommunication, a longitudinal voltage is a voltage induced or appearing along the length of a transmission medium.
		While generally referred to as a voltage spike, the phenomenon in question is actually a power spike, in that it is measured not in volts but in joules.
	frozenup.com /pages9/94/voltage.html (1071 words)

	Sistem napajanja
		In the rectifier modules the input voltage is converted through DC-DC converter and stabilized to the desired value of DC output voltage.
		Distribution voltage (on consumer) Ud is practically equal to the battery voltage Ub, the difference is negligible, and equals the voltage drop on the system adder.
		When the mains voltage is recovered or stabilized, the rectifiers are switched on automatically and they take over the load and recharging of the battery.
	www.gnet.co.yu /e_sistem_napajanja.htm (816 words)

	CyberXLink.com, cat5E, wall plates, keystone jacks, cat6, brackets, bezels, rj45, rj12, rj11, boots, rca, hdmi, dvi, ...
		parallel circuit - A circuit in which the identical voltage is presented to all components, and the current divides among the components according to the resistance or the impedance of the components.
		It is a factor of voltage multiplied by the current (amperage).
		The psophometric noise voltage is usually measured across a noninductive resistor of 600 ohms terminating the line at the place of measurement.
	www.cyberxlink.com /P_Definitions.php (5467 words)

	[No title]
		A field quantity is a quantity, such as voltage or sound pressure, the square of which in a linear system is proportional to power.
		The nominal relative voltage level at a given point of this transmission system is the voltage gain from the sound-programme transmission reference point to the point considered.
		The usual measuring situation is the one where a nominal (apparent) power level is given while a voltage level is measured, and this has to be compared with the power level.
	www.nmedia.net /docs/ccitt/questions/iv/q_iv.1 (2990 words)

	Telcom - The Rectifying Power SupplyI20
		The rectifying power supply I20 is designed to supply Telecommunication Systems with DC voltage -48V.
		The output DC voltage is distributed to the load in DC distribution IC20.
		According to the adjust parameters of the batteries, the current to the batteries is limited and float and boost voltage can be adjusted according to user request.
	www.telcom.co.yu /english/I20-5.html (140 words)

	Electromagnetic Interference - The Siemon Company
		When cable is in close proximity to strong electromagnetic fields, unwanted current and voltage may be induced on it.
		To reduce the voltage noise level due to the capacitive coupling between channels, either the capacitance CPT can be decreased (decreasing the capacitive coupling) or the impedances ZPT and Z0 can be increased.
		In shielding, noise voltage is induced into a foil or braid surrounding the twisted pairs, instead of onto the conductors.
	www.siemon.com /ca/white_papers/02-03-22-emi.asp (1187 words)

	Battery chargers
		Voltage: 220 Vac ± 15%, 45 to 55 Hz single-phase
		Voltages according to the model and number of battery cells: 2.25 V per cell adjustable in 15%
		Function: to convert alternating three-phase voltage into direct voltage to charge a storage battery bank.
	www.controles.com /ingles/potencia/cargbat.htm (445 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The noise voltage (Psophometric voltage) is a measure of the physiological interfering effect.
		This switch enables the full voltage or 1/100th of this voltage to be fed on to the input circuit of valve V1 in the case of weighted measurements and valve V2 in the case of "Flat” measurements.
		By this means, the voltage that is fed to valve V2 is weighted as per specification with respect to the input voltage applied to the set, and the reading of the meter M1 is a measure of weighted characteristics.
	www.iriset.ac.in /irinotes/tel/t7b/chap4.doc (2290 words)

	[No title]
		In a part of a hypothetical reference circuit consisting of one or more equal homogeneous sections, the one-minute mean noise power not exceeded during 20% of any month shall be considered to be proportional to the number of homogeneous sections involved.
		This value of psophometric power refers to the whole of the noise due to various sources (thermal noise, intermodulation, crosstalk, power supplies, etc.).
		This is the power of a sinusoidal signal whose amplitude is that of the peak voltage of the multiplex signal.
	www.nmedia.net /docs/ccitt/1988/3_2/3_2_01.html (9825 words)

	Telecom Power Systems, Power Supplies and DC/DC Converters from Delta Energy Systems
		The benefit is an optimised modular system design (fewer number of modules) and matches the supply requirements for state-of-the-art telecom equipment.
		This performance as well as the extended temperature range, wide input voltage range, high power density and advanced technology are the key factors of the success of this rectifier and it offers a cost effective and reliable solution.
		The typical applications for this rectifier are both in indoor and outdoor environments, which is a perfect solution for wireless base stations, core network components, telecommunications networks and data networks.
	www.deltaenergysystems.com /cps/rde/xchg/SID-2A49FAF4-5D50A077/desde/hs.xsl/eng-46_129.htm (160 words)

	Yenra Glossary P (Site not responding. Last check: 2007-10-08)
		At a given point in a transmission path, the maximum instantaneous signal power, voltage, or current that occurs during a specified period.
		Pockels cell - An electro-optic device in which birefringence is modified under the influence of an applied voltage.
		psophometric voltage - Circuit noise voltage measured with a psophometer that includes a CCIF-1951 weighting network.
	www.yenra.net /glossary/p.html (13123 words)

	Publications of Electrical Machines and Power Electronics
		The loop that controls the line current is based on a traditional instantaneous feedback technique while the loop that controls the armature voltage uses a new method that is based on calculations of voltage-time areas.
		Concerning the voltage rating of the valves, system A requires a much higher value than system B due to the second-order filter on the ac-side.
		With the transformer secondary voltage of 969V a valve voltage rating of 3,7kV is necessary for system A while system B requires only 2,1kV.
	eme.ekc.kth.se /publications.php?publ_people=mats_lic&year=thesis (494 words)

	WM Series Inverters for Telecommunications
		Maintenance free recombination monobloc batteries are supplied as optional items and the recharge float voltage is set at 54.48 V DC (nominal 48 V DC), the minimum autonomy battery is supplied within the bypass module.
		Psophometric filtering for CCITT is available on inverters requested for Telecoms applications as an optional feature.
		A bypass isolation transformer and voltage regulating transformer are available as optional items.
	www.powersystemsinternational.co.uk /rd_miniverter.htm (969 words)

	DC Backup Systems
		The unit is of the full wave thyristor regulator type and has the advantage of rugged simplicity and high reliability with low heat dissipation.
		Additional options are available such as battery low alarm and low voltage disconnect which will prevent a deep discharge of the battery bank.
		The unit includes a DC over voltage alarm and a mains fail alarm.
	www.sinetech.co.za /dcbpabx.htm (595 words)

	KR-4825 (Site not responding. Last check: 2007-10-08)
		It features unity power factor, typical efficiency greater than 90%, wide AC input range of 150 - 275Vac with natural cooling in an ambient of 0 - 50°C. Its hot-plug capability enables it to be safely taken in and out of the rack without switching off the power.
		Topaz KR-4830 is a derated version of KR-4825 operating in an ambient of 0 - 40°C with natural cooled and input voltage down to 189Vac.
		Optically coupled PWM signal used to control rectifier Float and Equalise voltage over a limited range to optimally adjust battery voltage for temperature and voltage drop in DC bus, limit the maximum battery recharging current and achieve active current sharing.
	www.topazpower.com /kr-4825.htm (622 words)

	EN 55103
		Each measurement or series of associated measurements of one phenomenon are carried out under a single set of environmental conditions within the specified operating environmental range of the apparatus and at its rated supply voltage, unless otherwise specified in the standard.
		Each test or series of associated tests of one phenomenon shall be carried out under a single set of environmental conditions within the specified operating environmental range of the apparatus and at its rated supply voltage, unless otherwise specified in EN 55103-2 or the relevant Basic Standard.
		Audio frequency interference voltages shall be measured using the quasi-peak meter and psophometric weighting specified in HD 483.1 unless the manufacturer’s specification states these voltages as A-weighted values or A-weighted levels in decibels.
	www.atlasce.com /requirements/europeanunion/en_55103.htm (1279 words)

	[No title]
		The rectifier is automatically set in floating or boost charge according to battery condition.
		The load is directly connected to the rectifier and to the battery, therefore it must be able to stand the voltage variation due to the charging conditions.
		In case of AC voltage loss the battery assures the load supply.
	web.tiscali.it /teletecnicaweb/pro_1_11_uk.htm (71 words)

	STMicroelectronics \| Integrated Pots Interface for Home Access Gateway and WLL - STLC3085
		One distinctive characteristic of this device is its ability to operate with a single supply voltage (from +4.5V to +12V) and to self generate the negative battery by means of an on-chip DC/DC conver ter controller that drives an external MOS switch.
		The output voltage in on-hook condition is equal to the self generated battery voltage (-46V typ).
		The on-hook voltage is typically 38V allowing on-hook transmission; the self generated Vbat is -46V typ.
	www.st.com /stonline/products/literature/ds/12095.htm (4238 words)

	Rane Professional Audio Reference (W)
		The goal is to obtain measurements that correlate well with the subjective perception of noise.
		A psophometer was a voltmeter with a set of weighting filters.) Weighting filters are a special type of band-limiting filters designed to compliment the way we hear.
		The bridge is a two-port network (i.e., it has two terminal pairs across opposite corners) capable of being operated in such a manner that when voltage is applied to one port, by suitable adjustment of the resistive elements in the network, zero output can be obtained at the signal output port (usually a meter).
	www.rane.com /par-w.html (2844 words)

	Definition: psophometric weighting (Site not responding. Last check: 2007-10-08)
		psophometric weighting: A noise weighting established by the International Consultative Committee for Telephony (CCIF, which became CCITT and, more recently, ITU-T), designated as CCIF-1951 weighting, for use in a noise measuring set or psophometer.
		Note: The shape of this characteristic is virtually identical to that of F1A weighting.
		The psophometer is, however, calibrated with a tone of 800 Hz, 0 dBm, so that the corresponding voltage across 600 ohms produces a reading of 0.775 V. This introduces a 1-dBm adjustment in the formulas for conversion with dBa.
	www.atis.org /tg2k/_psophometric_weighting.html (124 words)

	Delta - FR 48 / 60 V - 7000 W
		This rectifier can be operated either stand alone or in parallel connection with other FR 48 / 60V - 7000 W rectifiers.
		The rectifiers FR 48 V - 7000 W and FR 60 V - 7000 W have a constant output power limitation feature and can supply up to 7000 W at specified output voltage range.
		The modules are equipped with thermal overload protection circuitry and the cooling is based on forced air circulation with the rectifier’s own fan.
	www.deltaenergysystems.sk /page253sk.html (123 words)

	[No title]
		The voltage of a 0\ dBm0 tone at any voiceband frequency at a point of \fIx\fR \ dBr is given by the expression: \v'6p'.RT.sp 1P.ce 1000 V = @ sqrt { 0~\u\fIx\fR~/10~\d~\(mu~1~W~\(mu~10~\u\(em3~\d
		For long\(hydistance carrier circuits they are proportional to length, the appropriate noise power rate, 4\ pW/km or 1\ pW/km, being used according to whether the basic hypothetical reference circuit is one 2500\ km long or 7500\ km long.
		In the case of exchange noise, the point referred to is considered to be in the circuit immediately downstream, of the exchange.
	www.nmedia.net /docs/ccitt/1988/3_1/3_1_01.troff (14385 words)

	Amazon.com: "capacitor voltage dividers": Key Phrase page (Site not responding. Last check: 2007-10-08)
		See all pages with references to capacitor voltage dividers.
		Attenuator elements are formed by resistors, conductive vanes in a signal path, or capacitor voltage dividers.
		Voltage Dividers - Caddock -- Power, high voltage, current sense, low TC and precision resistors.
	www.amazon.com /phrase/capacitor-voltage-dividers (462 words)

	Battery Chargers (Site not responding. Last check: 2007-10-08)
		Battery Chargers draw power from the A.C. incoming supply, through a step-down Transfomer converted into D.C. by Rectifier, which (D.C.) is continuously and automatically maintained constant, under all working conditions, by employing controlling devices of either Thyristor (SCR) or Magnetic Amplifier or Servo-motor, associated with soild state control circuitries.
		Automatic stabilisation of D.C. Output Voltage within ± 1% (or even ± 5%) of the set level, irrespective of A.C. Supply fluctuations and / or load current variation, both with in the specified limits.
		Inherent automatic load current limiting (settable) / output voltage sharp drooping characteristic to safeguard the Battery Charager from damage by automatically passing the overload to the Battery.
	www.aelindia.com /batcha.htm (489 words)

	tensione psofometrica - noise voltage/psophometric voltage (Italian to English translation glossary) Tech/Engineering
		The KudoZ network provides a framework for translators and others to assist each other with translations or explanations of terms and short phrases.
		I don't have the Grande Sansoni, and my dictionary didn't give the term.
		I guessed it was probably psophometric, but it was useful to know it was connected to noise.
	www.proz.com /?sp=h&id=28454 (135 words)

	++++++Leading Providers of Power and telcom Solutions++++++
		± 1% of the half load voltage over full input range and 25 to 100% output current range.
		Provides better than 90% Efficiency at full load, Nominal input Voltage.
		Alphanumeric display Showing Load and Battery Voltage and Current and other system parameters.
	www.himachalexicom.com /product/smpe.html (389 words)

	Rectifier HPSuV(50-16U) - Gamatronic Electronic Industries Ltd.
		Voltage range: 45 to 57VDC (programmable via serial port)
		Voltage, current and other measurements via serial port
		Any forms of using or quotation, part or all should be authorized by copyright holder All Products Online Corporation.
	www.allproducts.com /israel/gamatronic/50-16u.html (128 words)

Try your search on: Qwika (all wikis)