Tektronix 2200 Switch User Manual


 
Glossary
G-6
Background, and the source selected on B
Background becomes selected on A
Background.
Floppy Disk: An electronic device which is
capable of storing data and programs for
ease of retrieval and use by a computer.
(Also see Hard Disk.)
Frame: One complete video picture
consisting of two interleaved fields. In the
NTSC system, one frame makes up a
complete TV scanning cycle (1/30th of a
second). In the PAL system, two frames (at
1/25th of a second) are required to make
up a complete TV scanning cycle.
Frame (hardware): The metal cabinet which
contains the switcher's circuit boards.
Frame Lock: Synchronization of the video
signal with a time code.
Freeze Frame: The recording or storage of
a single frame of video.
Front Porch: The portion of the video
signal that occurs during blanking and
extends from the end of active video to the
beginning of sync.
G
Gain: An amplification adjustment of the
key source attribute (chrominance, hue,
luminance, etc.) to be used for keying. The
GAIN control affects the sharpness of the
key edge.
Generation: The number of times removed
a dupe is from the original videotaped
material. A copy of the original is a second
generation tape, and so on.
GPI (General Purpose Interface): An
electronic device containing several
electronic switches that can be activated
by a remote data signal. GPIs allow the
editing system to control various remote
components.
Gray Scale: Range of luminance levels
from black to white.
H
Halo Border: A soft wipe pattern border
which is mixed with different softness on
each of the two edges to give a halo effect.
Hard Copy: A print out on paper of data
contained on another medium, such as a
monitor or disk.
Hard Disk: An electronic device which is
capable of storing large amounts of data
and programs for retrieval and use by a
computer. (Also see Floppy Disk.)
Hardware: The electric, electronic, and
mechanical equipment used to perform
the tasks controlled by a computer. (Also
see Firmware and Software).
Head: An electromagnetic device that
reads, writes, or erases information in a
storage medium.
Hex (hexidecimal): A numerical notation
system using a base of 16. (Also see Binary
and Octal).
House Sync: The synchronous signal
generated in the studio for use as a
reference for other timing signals.