Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 71
LC4.5E AA
9.
LVDS
Low Voltage Differential Signalling,
data transmission system for high
speed and low EMI communication.
M/N
Monochrome TV system. Sound
carrier distance is 4.5 MHz. M= 525
lines @ 60 Hz, N= 625 lines @ 50 Hz
MOSFET
Metal Oxide Semiconductor Field
Effect Transistor
MPEG
Motion Pictures Experts Group. An
ISO/IEC body that has given its name
to an image compressing scheme for
moving video
MSP
Multi-standard Sound Processor: ITT
sound decoder
MUTE
MUTE Line
NC
Not Connected
NICAM
Near Instantaneously Companded
Audio Multiplexing. This is a digital
sound system, used mainly in Europe.
NTSC
National Television Standard
Committee. Colour system used
mainly in North America and Japan.
Colour carrier NTSC M/N = 3.579545
MHz, NTSC 4.43 = 4.433619 MHz
(this is a VCR norm, it is not
transmitted off-air)
NVM
Non Volatile Memory; IC containing
data such as alignment values, preset
stations
O/C
Open Circuit
ON/OFF LED
Active-LOW control line. Logic LOW =
red LED "on", HIGH = red LED "off"
OSD
On Screen Display
P50
Project 50; Communication protocol
between TV and peripherals
PAL
Phase Alternating Line. Colour system
used mainly in Western Europe
(colour carrier = 4.433619 MHz) and
South America (colour carrier PAL M =
3.575612 MHz and PAL N = 3.582056
MHz)
PC
Personal Computer
PCB
Printed Circuit Board (also called PWB
or CBA)
PIG
Picture In Graphic
PIP
Picture In Picture
PLL
Phase Locked Loop. Used, for
example, in FST tuning systems. The
customer can give in directly the
desired frequency
Progressive Scan
Scan mode where all scan lines are
displayed in one frame at the same
time, creating a double vertical
resolution.
PWB
Printed Wiring Board (also called PCB
or CBA)
RAM
Random Access Memory
RC
Remote Control transmitter
RC5
Remote Control system 5, the signal
format from the remote control
RGB
Red, Green, and Blue colour space;
The primary colour signals for TV. By
mixing levels of R, G, and B, all colours
(Y/C) are reproduced
RGBHV
Red, Green, Blue, Horizontal sync,
and Vertical sync
ROM
Read Only Memory
SAM
Service Alignment Mode
SC
SandCastle: two-level pulse derived
from sync signals
SC1-OUT
SCART output of the MSP audio IC
SC2-B-IN
SCART2 Blue in
SC2-C-IN
SCART2 chrominance in
SC2-OUT
SCART output of the MSP audio IC
S/C
Short Circuit
SCART
Syndicat des Constructeurs
d'Appareils Radiorécepteurs et
Téléviseurs; This is a 21-pin connector
used in EU, that carries various audio,
video, and control signals (it is also
called Péritel connector)
SCL
CLock Signal on I
2
C bus
SD
Standard Definition
SDA
Serial Data line of I
2
C bus
SDI
Samsung Display Industry (supplier)
SDRAM
Synchronous DRAM
SECAM
SÉquence Couleur Avec Mémoire;
Colour system mainly used in France
and East Europe. The chroma is FM
modulated and the R-Y and B-Y
signals are transmitted line
sequentially. Colour carriers=
4.406250 MHz and 4.250000 MHz
SIF
Sound Intermediate Frequency
SMPS
Switched Mode Power Supply
SND
SouND
SNDL-SC1-IN
Sound left SCART1 in
SNDL-SC1-OUT
Sound left SCART1 out
SNDL-SC2-IN
Sound left SCART2 in
SNDL-SC2-OUT
Sound left SCART2 out
SNDR-SC1-IN
Sound right SCART1 in
SNDR-SC1-OUT
Sound right SCART1 out
SNDR-SC2-IN
Sound right SCART2 out
SNDR-SC2-OUT
Sound right SCART2 out
SNDS-VL-OUT
Surround sound left variable level out
SNDS-VR-OUT
Surround sound right variable level out
SOPS
Self Oscillating Power Supply
S/PDIF
Sony Philips Digital InterFace; This is
a consumer interface used to transfer
digital audio
SRAM
Static RAM
STBY
STand-BY
SVHS
Super Video Home System
SW
Sub Woofer / SoftWare / Switch
THD
Total Harmonic Distortion
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
VA
Vertical Acquisition
VL
Variable Level out: processed audio
output toward 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
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
Y/C
Y consists of luminance signal,
blanking level and sync; C consists of
chroma (colour) signal
Y-OUT
Luminance-signal
YUV
Colour space used by the NTSC and
PAL video systems. Y is the luminance
and U/V are the colour difference
signals
