Shared Flashcard Set

Details

Advanced Show Production Systems
Fiber Optics & IEM Systems
23
Engineering
Undergraduate 4
04/22/2013

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Cards

Term
Name the three parts of the fiber optic cable.
Definition
Core, Cladding, Coating
Term
What is the difference between multimode and single mode fiber?
Definition
One has short distance and lower bandwidth. The other has long distance and unlimited bandwidth.
Term
What is the difference between tight and loose buffer cable?
Definition
One is light weight, easy to terminate, and for indoor use.
The other has greater resistance to temperature changes, used outdoors, and harder to terminate.
Term
Name the four advantages of using fiber over copper cables.
Definition
Difficult to tap, Immune to EMI, Longer Distances, Greater Information Capacity, No crosstalk.
Term
Name two methods used to splice fiber cables.
Definition
Fusion and Mechanical
Term
What are the two most common connectors used for termination of fiber?
Definition
SC (square), ST (round)
Term
Name three fiber optic light sources used in fiber optics.
Definition
LED, VCSEL, Laser Diode
Term
What does VCSEL stand for?
Definition
Vertical Cavity Surface Emitting Laser
Term
Name some unique benefits ear monitors provide.
Definition
Mobility, safer on ears, stage sight lines, less stage volume, less chance for feedback, better sounding mix, quick set-up and strike, less bulk.
Term
Give some application examples of an in ear monitor system.
Definition
Theater, broadcast, live performance, studio monitoring.
Term
A basic wireless in-ear monitor system consists of…
Definition
Console → multi-band peak limiter/compressor → transmitter → receiver → ear molds.
Term
Why is it important to drive an in-ear monitor system transmitter properly?
Definition
•If the input is too low, you will have to operate the receiver volume at too high a level leading to excessive noise.
•If the input is too high, you will cause over-modulation distortion. There is also a danger of bleed into adjacent radio channels.
Term
Why is a multi-band peak limiter necessary at the transmitter input?
Definition
To prevent hearing damage due to a level spike or feedback loop, and to enhance the mix.
Term
What bank positions typically use hardwire in-ear mix as opposed to a wireless one?
Definition
Stationary performers.
Term
What is the first thing you need to do to obtain custom ear molds?
Definition
Go to a hearing aid center or an audiologist and have impressions taken of your ears.
Term
How can an ambient microphone fed into a musician’s in ear monitor mix help the musician?
Definition
•It helps the musicians hear the crowd response.
•It helps with localization when using isolating molds.
•Allows communication on stage.
Term
Explain why a monitor wedge would be used in combination with an in-ear mix.
Definition
Low end supplement.
Term
What is multi-band limiting?
Definition
It allows separate limiter control over multiple frequency bands.
Term
Name some techniques other than a wedge that are used to enhance the low end of an in-ear mix.
Definition
•Bass "shaker”
•Side fill subs.
Term
What is multimode fiber?
Definition
Has a short distance and lower bandwidth.
Term
What is single mode fiber?
Definition
Has long distance and unlimited bandwidth.
Term
What is tight buffer cable?
Definition
It is light weight, easy to terminate, for indoor use.
Term
What is loose buffer cable?
Definition
It has a greater resistance to temperature changes, used outdoors, and harder to terminate.
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