Barco UDX 4K22, Руководство по установке, Страница: 117 / 120

R5906113 UDX 07/07/2017 113
Glossary
GLOSSARY
Broadcast address
Projector will always execute the command coming from a RCU programmed with that broadcast address.
DMX
DMX-512 Lighting protocol over RS-485 interface. Carries information of 512 channels from a lighting controller to lighting devices.
Standardized by USITT.
HD
Hazard Distance (HD) is the distance measured from the projection lens at which the intensity or the energy per surface unit becomes
lower than the applicable exposure limit on the cornea or on the skin. The light beam is considered (to be) unsafe for exposure if
the distance from a person to the light source is less than the HD.
Light processor unit
Heart of the projector, unit inside this projector which is responsible for the creation of the image to be projected on the screen. Also
called ’engine’.
Projector address
Address installed in the projector to be individually controlled.
RS232
An Electronic Industries Association (EIA) serial digital interface standard specifying the characteristics of the communication path
between two devices using either D-SUB 9 pins or D-SUB 25 pins connectors. This standard is used for relatively short-range
communications and does not specify balanced control lines. RS-232 is a serial control standard with a set number of conductors,
data rate, word length and type of connector to be used. The standard specifies component connection standards with regard to
computer interface. It is also called RS-232-C, which is the third version of the RS-232 standard, and is functionally identical to the
CCITT V.24 standard. Logical ’0’ is > + 3V, Logical ’1’ is < - 3V. The range between -3V and +3V is the transition zone.
RS422
An EIA serial digital interface standard that specifies the electrical characteristics of balanced (differential) voltage, digital interface
circuits. This standard is usable over longer distances than RS-232. This signal governs the asynchronous transmission of computer
data at speeds of up to 920,000 bits per second. It is also used as the serial port standard for Macintosh computers. When the
difference between the 2 lines is < - 0.2V that equals with a logical ’0’. When the difference is > +0.2V that equals to a logical ’1’..
Scheimpflug principle
The "plane of sharp focus" can be changed so that any plane can be brought into sharp focus. When the DMD plane and lens plane
are parallel, the plane of sharp focus will also be parallel to these two planes. If, however, the lens plane is tilted with respect to the
DMD plane, the plane of sharp focus will also be tilted according to geometrical and optical properties. The DMD plane, the principal
lens plane and the sharp focus plane will intersect in a line below the projector for downward lens tilt.