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300 /MPC300T Test Procedure MPC b
300 /MPC300T Test Procedure MPC b

... oscilloscope. It will be necessary to have the oscilloscope measure unfiltered distortion from the amplifier in order to see the crossover spike. It is necessary to disable the 80kHz lowpass filter on the analyzer for this test. Further trim VR501 so that the total distortion for that channel is at ...
STP 3 & 4
STP 3 & 4

... effects. Fiber optic multiplexing media is also unaffected by the radiated noise from high voltage conductors, by high frequency motor control drives, and by transient switching pulses from electromagnetic contactors or other switching devices. However, the electrical-to-optical interface at the tra ...
DEPARTMENT OF ELECTRICAL ENGINEERING
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... I. Overview of Department of Electrical Engineering The Electrical Engineering (EE) department is part of the School of Engineering (SoE) at SNU. Its vision is to be a catalyst in imparting quality education and conducting valued research for the benefit of society. Historically, the field of elect ...
PV Commissioning forms - Sustainable Technologies Evaluation
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... Array main cable specifications - size and type Array junction box / combiner box locations (where applicable) DC isolator type, location and rating (voltage / current) Array over-current protective devices (where applicable) - type, location and rating ...
EET422 EMC intro -banana skins 2008-2009 msw
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... The counterweights used in elevator systems are huge blocks of metal that over time can build up a strong magnetic charge as they move up and down the elevator shaft. A monitor against a wall next to the elevator shaft might show strange intermittent distortions every time the elevator counterweight ...
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Blu-ray Disc Player - Manuales de Service

... • Check the electrical DC resistance between the Mains/AC Power plug and the secondary side (only for sets that have a Mains/AC Power isolated power supply): 1. Unplug the Mains/AC Power cord and connect a wire between the two pins of the Mains/AC Power plug. 2. Set the Mains/AC Power switch to the ...
modular dimming controls - Controls for Lighting at LM
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... 1. All proposed substitutions (clearly delineated as such) must be submitted in writing for approval by the design professional a minimum of 10 working days prior to the bid date and must be made available to all bidders. 2. Proposed substitutes must be accompanied by a review of the specification n ...
Evaluates: MAX9789A/MAX9790A MAX9789A Evaluation Kit General Description Features
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External Network Interface User`s Guide
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... This manual may not be copied in whole or in part without express written permission from Albércorp. Printed in the United States of America. Microsoft and Microsoft Windows are registered trademarks of Microsoft Corporation. HyperTerminal is a registered trademark of Hilgraeve, Inc. ...
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... headphone plug inserted, the tip switch signals a high to the LM4880 shutdown pin and a low to the LM4861 shutdown pins, effectively powering down any signal to the audio jack. Likewise, when a headphone plug is introduced, and the tip switch is pushed away from the tip connection, the speaker ampli ...
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MPA Gold Manual
MPA Gold Manual

... This knob controls the Mic/line input amplifier impedance. This function allows variable voicing of any microphone. Refer to the application section titled “Adjusting the Input Impedance” for more information on making the most of this function. The ¼” instrument input is NOT affected by this contro ...
ORION english manual (word)
ORION english manual (word)

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Audio Component Interconnection - Pro

... (eventually) transfers into the amplifier and, because it is an exact representation of the original audio signal, it is simply amplified to provide a more powerful electrical energy that will drive speakers. An analog preamp level output won’t directly drive a speaker on it’s own. The bulk of mobile ...
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... able to interpret circuit schematics; design, construct, verify, and analyze DC/AC circuits; and properly use test equipment. ELC 131A Circuit Analysis I Lab ...
Chapter 6 - An
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... 1- The capacitors are replaced by effective shorts because their values are selected so that the capacitive resistance XC is negligible at the signal frequency and can be considered to be 0 Ω. * Note that C2 must be large enough so that XC2 is very small compared to RE ( ...
Heathkit SB-401 - Orange County (California) Amateur Radio Club
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... The heterodyne oscillator generates the frequency needed to heterodyne the output from the LMO mixer to the final frequency. In transceiver mode the heterodyne signal is created in the receiver and buffered in the transmitter by the pentode section of V8(A), a 6AW8. In the transmit mode the triode s ...
Dynaudio Professional BM5 mkIII manual.indd
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... equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If the equipment ...
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... themselves relatively simple. An example of the receiver centered star is a weatherdata-collection network, with many unattended measuring stations, which send data from time to time to a central receiving site. Star networks can be configured using duplex rater than simplex links, if this proves de ...
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... seem to have this problem): all 2N3904 transistors (3 pieces) are mounted incorrectly. It’s not clear why this mistake is made, maybe earlier designs used another transistor that have another pin-order than the 2N3904, and the 2N3904 was chosen later in the process. One other cause of this mistake m ...
ADI`s Automatic External Defibrillator (AED
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... designed to extract, amplify, and filter small biopotential signals in the presence of noisy conditions, such as those created by motion or remote electrode placement. This design allows for an ultralow power ADC or an embedded microcontroller to acquire the output signal easily ...
A Method for Measuring Transient Intermodulation Distortion (TIM)*
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... multiplicity of closely spaced intermodulation products falling to the audio band. As a compromise, a frequency of 3.18 kHz has been chosen for the square wave, corresponding to 3' = 4. If a 6-kHz sinusoid is used, the preferred frequency of the square wave is 1.27 kHz. The square wave is filtered w ...
Soundelux U195 User`s Manual
Soundelux U195 User`s Manual

... If, however the supply voltage is applied to unbalanced or center tap grounded amplifier inputs, it will be shorted and the mic so connected will not work. In center tap grounded equipment with input transformers the respective ground connection may, in most cases, be lifted without any negative eff ...
CPI 2000 - Woody`s CB GAZETTE
CPI 2000 - Woody`s CB GAZETTE

... C255 resonate at 27 MHz on the output of Q223. This output is fed into the gate of JFET mixer Q201. The source of Q201 is fed with local oscillator signal by Q206. The 10.200 MHz IF output of Q201 is fed through a delay network, consisting of L211, L214, C296, C297 and C258. The delay network is req ...
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Public address system



A public address system (PA system) is an electronic sound amplification and distribution system with a microphone, amplifier and loudspeakers, used to allow a person to address a large public, for example for announcements of movements at large and noisy air and rail terminals or at a sports stadium. The term is also used for systems which may additionally have a mixing console, and amplifiers and loudspeakers suitable for music as well as speech, used to reinforce a sound source, such as recorded music or a person giving a speech or distributing the sound throughout a venue or building.Simple PA systems are often used in small venues such as school auditoriums, churches, and small bars. PA systems with many speakers are widely used to make announcements in public, institutional and commercial buildings and locations. Intercom systems, installed in many buildings, have microphones in many rooms allowing the occupants to respond to announcements.Sound reinforcement systems and PA systems may use some similar components, but with differing application, although the distinction between the two is not clear-cut. Sound reinforcement systems are for live music or performance, whereas PA systems are primarily for reproduction of speech. In Britain any PA system is sometimes colloquially referred to as a Tannoy, after the company of that name now owned by TC Electronic Group, which supplied a great many of the PA systems used previously in Britain.
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