Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
9.4
Abbreviation List
1080i
1080 visible lines, interlaced
1080p
1080 visible lines, progressive scan
ADC
Analogue to Digital Converter
AFC
Automatic Frequency Control: control
signal used to tune to the correct
frequency
AGC
Automatic Gain Control: algorithm that
controls the video input of the feature
box
AM
Amplitude Modulation
AR
Aspect Ratio: 4 by 3 or 16 by 9
AV
Audio Video
B/G
Monochrome TV system. Sound
carrier distance is 5.5 MHz
BTSC
Broadcast Television System
Committee
CBA
Circuit Board Assembly (or PWB)
CVBS
Composite Video Blanking and
Synchronization
CVI
Component Video Input
DAC
Digital to analogue Converter
DFU
Directions For Use: owner's manual
DNR
Dynamic Noise Reduction
DRAM
Dynamic RAM
DSP
Digital Signal Processing
DVD
Digital Versatile Disc
EEPROM
Electrically Erasable and
Programmable Read Only Memory
EXT
EXTernal (source), entering the set by
SCART or by cinches (jacks)
FBL
Fast Blanking: DC signal
accompanying RGB signals
FM
Field Memory / Frequency Modulation
H
H_sync
HD
High Definition: 720p, 1080i, 1080p
HP
Head Phone
I
Monochrome TV system. Sound
carrier distance is 6.0 MHz
I2C
Integrated IC bus
IC
Integrated Circuit
IF
Intermediate Frequency
IR
Infra Red
IRQ
Interrupt ReQuest
Last Status
The settings last chosen by the
customer and read and stored in RAM
or in the NVM. They are called at start-
up of the set to configure it according
the customers wishes
LATAM
LATin AMerica
LED
Light Emitting Diode
LS
Loud Speaker
M/N
Monochrome TV system. Sound
carrier distance is 4.5 MHz
MOSFET
Metal Oxide Semiconductor Field
Effect Transistor
MUTE
MUTE Line
NAFTA
North American Free Trade
Association: Trade agreement
between Canada, USA and Mexico
NC
Not Connected
NTSC
National Television Standard
Committee. Color system used mainly
in North America and Japan. Color
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
TV related data (for example, options)
O/C
Open Circuit
OSD
On Screen Display
PAL
Phase Alternating Line. Color system
used mainly in Western Europe (color
carrier = 4.433619 MHz) and South
America (color carrier PAL M =
3.575612 MHz and PAL N = 3.582056
MHz)
PCB
Printed Circuit Board (or PWB)
PIP
Picture In Picture
PLL
Phase Locked Loop. Used, for
example, in FST tuning systems. The
customer can directly provide the
desired frequency
PSU
Power Supply Unit
PWB
Printed Wiring Board (or PCB)
RAM
Random Access Memory
RC
Remote Control transmitter
RC5 (6)
Remote Control system 5 (6), the
signal from the remote control receiver
RF
Radio Frequency
RGB
Red, Green, and Blue. The primary
color signals for TV. By mixing levels
of R, G, and B, all colors (Y/C) are
reproduced.
RGBHV
Red, Green, Blue, Horizontal sync,
and Vertical sync
ROM
Read Only Memory
SC
SandCastle: two-level pulse derived
from sync signals
S/C
Short Circuit
SCL
Clock signal on I2C bus
SD
Standard Definition: 480i, 576i
SDA
Data signal on I2C bus
SDRAM
Synchronous DRAM
SECAM
SEequence Couleur Avec Memoire.
Color system used mainly in France
and Eastern Europe. Color carriers =
4.406250 MHz and 4.250000 MHz
SIF
Sound Intermediate Frequency
SMPS
Switch Mode Power Supply
SND
SouND
SOPS
Self Oscillating Power Supply
SRAM
Static RAM
SSB
Small Signal Board
STBY
Stand-by
SVHS
Super Video Home System
SW
Sub Woofer / SoftWare / Switch
THD
Total Harmonic Distortion
TXT
TeleteXT
uP
Microprocessor
VL
Variable Level out: processed audio
output toward external amplifier
VCR
Video Cassette Recorder
VGA
Video Graphics Array
WYSIWYR
What You See Is What You Record:
record selection that follows main
picture and sound
XTAL
Quartz crystal
YPbPr
Component video (Y= Luminance, Pb/
Pr= Color difference signals B-Y and
R-Y, other amplitudes w.r.t. to YUV)
Y/C
Video related signals: Y consists of
luminance signal, blanking level and
sync; C consists of color signal.
Y-OUT
Luminance-signal
YUV
Baseband component video (Y=
Luminance, U/V= Color difference
signals)
