Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 92 LC4.41E AA9.
TXT Teletext; TXT is a digital addition to
analogue TV signals that contain
textual and graphical information (25
rows x 40 columns). The information is
transmitted within the first 25 lines
during the Vertical Blank Interval (VBI)
uP Microprocessor
UOC Ultimate One Chip, or Hercules
VA Vertical Acquisition
VL Variable Level out: processed audio
output towards external amplifier
VCR Video Cassette Recorder
VGA Video Graphics Array; 640x480 (4:3)
WD Watch Dog
WYSIWYR What You See Is What You Record:
record selection that follows main
picture and sound
XTAL Quartz crystal
Y Luminance signal
Y/C Y consists of luminance signal,
blanking level and sync; C consists of
chroma (colour) signal
YPbPr This is a scaled version of the YUV
colour space. Y= Luminance, Pb/Pr=
Colour difference signals B-Y and R-Y,
other amplitudes w.r.t. to YUV
YUV Colour space used by the NTSC and
PAL video systems. Y is the luminance
and U/V are the colour difference
signals
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