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18 Cards in this Set
- Front
- Back
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What are two components that make up a radio wave?
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Magnetic field (H) Electric field (E)
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Which type of modulation is used for wireless microphone and In-Ear-Monitor systems?
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Frequency modulation
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What is the purpose of the squelch circuit?
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To drop out the noise caused when signal falls below the threshold
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Name 5 types of antenna designs discussed in class?
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Logarithmic Periodical Dipole Antenna, Helical, Yagi
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Why is a transformer required at each speaker in a distributed system?
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Step down voltage
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What is another common name for a constant voltage system?
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High Impedance, 70 volt
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What is the industry rule of thumb used when figuring required amplifier output wattage for a constant voltage system?
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Amp output + 20%= Amp wattage x 1.2 = Amp watts
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What three voltages are used for constant voltage systems?
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100v, 70.7 v, 25 v
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Name 3 materials used to make compression driver diaphragms
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Beryllium, Titanium, Aluminum
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Name 3 benefits obtained by using ferro fluid in loudspeaker voice coil gaps
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Less heat, magnitized
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Name 3 methods used to test loudspeakers
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Continuity, 9v battery, Sine Wave
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What band positions typically use a hardwired in ear mix as opposed to a wireless one?
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Stationary Performers
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Name 5 benefits gained by using IEM systems
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Mobilin, Better sounding mix, less stage volume, Communication on stage
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List in order the 5 components of a single wireless IEM mix
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Console, Multiband limiter/Processor, Transmitter, Reliever, Ear molds
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Name some techniques (besides a wedge) used to enhance the low end of an in ear mix
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Bass Shaker, Side fill, subs
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Why would a monitor engineer an ambient mic into an IEM mix
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Crown response for performers, communication on stage
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Give two application examples of where someone would use IEMs
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Broadcast, Live performance, Corporate Event
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What type of batteries are recommended for wireless microphones?
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AA
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