Theatre Jargon Buster: Difference between revisions
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'''Batten:''' Older style of floodlight unit, suspended above the stage area mainly to light the cyclorama or back cloth.<br><br> | '''Batten:''' Older style of floodlight unit, suspended above the stage area mainly to light the cyclorama or back cloth.<br><br> | ||
'''Blackout:''' Lighting condition in which all controllable lights are turned off.<br><br> | '''Blackout:''' Lighting condition in which all controllable lights are turned off.<br><br> | ||
'''CAD''' Computer-aided design (CAD) is the use of computer technology for the process of design and design-documentation <br><br> | |||
'''Call:''' To call or cue the different technical departments. Usually a member of the stage management team will be responsible for this.<br><br> | '''Call:''' To call or cue the different technical departments. Usually a member of the stage management team will be responsible for this.<br><br> | ||
'''Cap:''' The cap/connection end of the lamp, sometimes pins, sometimes a bayonet fitting.<br><br> | '''Cap:''' The cap/connection end of the lamp, sometimes pins, sometimes a bayonet fitting.<br><br> | ||
'''Carrier:''' Lens carrier, the mechanical holder for one or more lenses, within the lens tube of a profile lantern, providing the ability to move the lens back and forwards.<br><br> | '''Carrier:''' Lens carrier, the mechanical holder for one or more lenses, within the lens tube of a profile lantern, providing the ability to move the lens back and forwards.<br><br> | ||
'''Clipping:''' Where a sound signal is much too loud for a mixer or processor to handle. The top portion of the sound wave is clipped off due to the dynamic range of the signal being more than the equipment allows.<br><br> | '''Clipping:''' Where a sound signal is much too loud for a mixer or processor to handle. The top portion of the sound wave is clipped off due to the dynamic range of the signal being more than the equipment allows.<br><br> | ||
'''Coaxial cable:''' Short version - cable with BNC connectors used for cameras/monitors/radio mic aerials.<br> | |||
Long Version - Coaxial cable, or coax, is an electrical cable with an inner conductor surrounded by a flexible, tubular insulating layer, surrounded by a tubular conducting shield. The term coaxial comes from the inner conductor and the outer shield sharing the same geometric axis. | |||
Coaxial cable is used as a transmission line for radio frequency signals, in applications such as connecting radio transmitters and receivers with their antennas, computer network (Internet) connections, and distributing cable television signals. One advantage of coax over other types of radio transmission line is that in an ideal coaxial cable the electromagnetic field carrying the signal exists only in the space between the inner and outer conductors. This allows coaxial cable runs to be installed next to metal objects such as gutters without the power losses that occur in other types of transmission lines, and provides protection of the signal from external electromagnetic interference. | |||
Coaxial cable differs from other shielded cable used for carrying lower frequency signals such as audio signals, in that the dimensions of the cable are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a radio frequency transmission line | |||
[[Image:Coaxial_cable_cutaway.png|200px]] | |||
'''Colour filter:''' A thin acetate film, which will withstand high temperatures generated by the lantern. Available in a wide range of colours.<br><br> | '''Colour filter:''' A thin acetate film, which will withstand high temperatures generated by the lantern. Available in a wide range of colours.<br><br> | ||
'''Colour magazine:''' Usually associated with Followspots, providing a mechanical means of placing colour into the beam of light.<br><br> | '''Colour magazine:''' Usually associated with Followspots, providing a mechanical means of placing colour into the beam of light.<br><br> | ||
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'''Gain:''' Essential a very broad volume control that is used to raise or lower the level of an audio signal pre-fade.<br><br> | '''Gain:''' Essential a very broad volume control that is used to raise or lower the level of an audio signal pre-fade.<br><br> | ||
'''Gate:''' Opening in the top of the lens tube of a profile lantern, behind the lenses, into which accessories such as Gobos or an Iris Diaphragm may be inserted.<br><br> | '''Gate:''' Opening in the top of the lens tube of a profile lantern, behind the lenses, into which accessories such as Gobos or an Iris Diaphragm may be inserted.<br><br> | ||
'''Gel''' See "Cololur Filter". Common manufacturers are Lee, Rosco and Gam <br><br> | |||
'''Gobo:''' Metal or glass plate with a pattern or image etched into it. Used in a profile lantern or intelligent fixture to project an image.<br><br> | '''Gobo:''' Metal or glass plate with a pattern or image etched into it. Used in a profile lantern or intelligent fixture to project an image.<br><br> | ||
'''Ground row:''' Floodlight unit, mainly used to light the cyclorama or back cloth being floor mounted.<br><br> | '''Ground row:''' Floodlight unit, mainly used to light the cyclorama or back cloth being floor mounted.<br><br> | ||
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'''Moving Lights:''' These fall into two types: moving head and moving mirror. The moving head requires the whole of the lamp housing to pan and tilt, whereas the moving mirror has the lamp housing fixed and operates a motorised mirror in front of the lens. These are also known as Intelligent Fixtures.<br><br> | '''Moving Lights:''' These fall into two types: moving head and moving mirror. The moving head requires the whole of the lamp housing to pan and tilt, whereas the moving mirror has the lamp housing fixed and operates a motorised mirror in front of the lens. These are also known as Intelligent Fixtures.<br><br> | ||
'''MSR:''' Medium Source Rate Earth type of discharge lamp often used in modern Followspots.<br><br> | '''MSR:''' Medium Source Rate Earth type of discharge lamp often used in modern Followspots.<br><br> | ||
'''Muticore:''' A multicore cable is a generic term for an electrical cable that has multiple cores. The term is normally only used in relation to a cable that has more cores than commonly encountered. For example, a four core mains cable is never referred to as multicore, but a cable comprising four coaxial cables in a single sheath would be considered a multicore. | |||
The term multicore cable or "Multi" is frequently used in the theatrical industry to refer to an audio or power multicore cable | |||
'''Normalization:''' The process of adjusting the volume of a group of audio files so that they all play at the same volume.<br><br> | '''Normalization:''' The process of adjusting the volume of a group of audio files so that they all play at the same volume.<br><br> | ||
'''Ohms Law:''' The calculation by which the amperage load of a circuit can be found.<br><br> | '''Ohms Law:''' The calculation by which the amperage load of a circuit can be found.<br><br> | ||
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'''Plotting:''' The work of setting up different lighting states and the changes between them. A plotting session is an essential part of every show.<br><br> | '''Plotting:''' The work of setting up different lighting states and the changes between them. A plotting session is an essential part of every show.<br><br> | ||
'''Preamp:''' Hardware that boosts the level of an audio signal to a set level before being sent to the main amplifier.<br><br> | '''Preamp:''' Hardware that boosts the level of an audio signal to a set level before being sent to the main amplifier.<br><br> | ||
''' | '''Pebble Convex Lantern:''' Also called a PC, this is another of the five main categories of lantern.<br><br> | ||
'''Production Desk:''' Usually in the auditorium during rehearsals, this is the operational centre during technical set-up.<br><br> | '''Production Desk:''' Usually in the auditorium during rehearsals, this is the operational centre during technical set-up.<br><br> | ||
'''Profile:''' One of the five main categories of lantern.<br><br> | '''Profile:''' One of the five main categories of lantern.<br><br> | ||
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'''Shutter:''' Within a Profile lantern, one of a set of four shutter blades used to shape the beam of light.<br><br> | '''Shutter:''' Within a Profile lantern, one of a set of four shutter blades used to shape the beam of light.<br><br> | ||
'''Spill:''' Unwanted elements of light, often controlled by the use of Barndoors.<br><br> | '''Spill:''' Unwanted elements of light, often controlled by the use of Barndoors.<br><br> | ||
'''SWL:''' Safe Working Load.(see WLL)<br><br> | '''SWL:''' Safe Working Load. Calculated by dividing the Minimum Breaking Load by a Safety Factor (see also WLL)<br><br> | ||
'''Stencil:''' Scale representation of lantern shape/types, used in drawing rig plans. Modern CAD packages are now more commonly used in design.<br><br> | '''Stencil:''' Scale representation of lantern shape/types, used in drawing rig plans. Modern CAD packages are now more commonly used in design.<br><br> | ||
'''Tabs:''' Or Tableau Curtains. These may be the main Proscenium Arch curtains, often called House Tabs, or a pair of curtains crossing the stage at any position. Usually blacks.<br><br> | '''Tabs:''' Or Tableau Curtains. These may be the main Proscenium Arch curtains, often called House Tabs, or a pair of curtains crossing the stage at any position. Usually blacks.<br><br> | ||
'''Trunion Arm:''' Also known as the Yoke, it surrounds the lantern and provides the main suspension position.<br><br> | '''Trunion Arm:''' Also known as the Yoke, it surrounds the lantern and provides the main suspension position.<br><br> | ||
'''Wash:''' See Coverage. | '''Vectorworks''' A Computer Aided Design / Drafting Programme (See CAD). Used for Theatre Plans, Lighting Plans, Construction Drawings in both 3D and 2D<br><br> | ||
'''WLL''' Working Load Limit(see SWL) | '''Wash:''' See Coverage.<br><br> | ||
'''Zoom Profile:''' The use of two independently movable lenses within a Profile lantern. | '''WLL''' Working Load Limit. An absolute limit to the item's strength (see also SWL) <br><br> | ||
<br><br> | '''Zoom Profile:''' The use of two independently movable lenses within a Profile lantern. <br><br> | ||
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Link to external Jargon Buster [http://www.theatrecrafts.com/glossary/glossary.shtml here] | |||
