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30 Cards in this Set
- Front
- Back
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What are two field compoents that make up a radio Wave?
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Electric and Magnetic
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What is a carrier wave?
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A basd unmodualted frequency
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What are the two types of Modulation?
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AM and FM
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What type of modulation is used for wireless mics and IEM systems?
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FM
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What two types of audio are Processing used in transmitting and recieving?
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Pre and Post Emphasized Eq and Companding
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What does "True Diversity" mean?
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The ability to Sample radio signals from two or more locations
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What diversity design is most commonly Used?
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Recieving switching
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What is the Miniumn Antenna size for transmitting and recieving?
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1/4 The wavelength that you are trying to transmitt or recieve
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Name 4 types of Antennas
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Ground Plane,LPDA,Yagi, Helical
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What is the best way to Maintain maxium effiency between transmitting and recieving Antenna?
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Maintain line of sight
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Two types of Antenna Distribution?
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Passive and Active
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What causes drop outs and and Noise ups and Hits?
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Drop outs, Dead Batteries, and Obstructions
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What is the purpose of the squelch circuit?
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Mute Audio when RF fails beleow threshold
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Why should you Turn on Amps after Other gear?
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You dont want to pop the system
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Name some methods to test a driver?
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Sine wave sweep, Battery and digital Multimeter
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Name 3 benefits of using Ferrofulid
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Heat Dissapation, Coil centering and Mechanical Damping
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Name 3 types of Material used to make compression Driver Diaphragms?
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Titanium, Aluminmun and Berellyum
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What is Dynamic Rnage?
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Peak level- Peak Floor
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What is Thermal Noise
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Electronic Noise
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Why are we forced to deal with a systems gain structure?
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No standard Peak level and or Noise floor
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How many volts DOES 0dBu equal
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.775volts
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What is the benifit of Laying out a sustems gain structure on paper?
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Good Purchase and Design decision
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How can we adjust a systems gain structure
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Pad cslc, On board controls, External Pads,STP1 ATTENUATOR
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What is the purpose of a system Limitor?
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Early warning sign for system protection
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What ratio setting is best for a system Limmitor
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8:1
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What are some ways to determine clipping points
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Ossiciolscope, Peizo driver, On board Indicators
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What is another name for a Constant voltange system?
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High Impedance, 70volt, Distributed
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Where are constant voltage systems mainly found?
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Commercial Establishments
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Why is a transformer reqiuired at each speaker in a distributed system?
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Commercial power distribution
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What are some speaker ratings
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70.7 , 100, 25 volts
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