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CMT2988P
TECHNICAL SPECIFICATIONS
625-1
ines B. G/ I /D. K(H PAL
Aerial input
B. G/D. K/K SECAM
Color picture tube
NTSC50
Reception system
525-1
ines M/NTSC
NTSC3. 58-5. 5/6. 0/6. 5
Speaker
NTSC4. 43-5. 5/6. 0/6.
5
Sound output
PAL60
Power supp I y
CCIR
: E2--12, E21 "'69, 01"'3,
Power consumption
Channel coverraze
S1--10, 511 .. 20
(IEC Rated)
01 RT
: Rl--12, R21 .. 69
Weight (kg)
( Frequency range)
JAPAN : Jl--12, Jl3 .. 62
Dimensions
45MHz ... 294MHz
U.S.
A. :
US2--13, Hl, US14--69
4 70MHz ... 863MHz
Hong Kong, U. K. : UK21 .... 69
WXHXD (em)
China : Cl .. l2, Cl3 ..
57
Country of manufacture
*
Specifications are subject to change without notice to improve performance.
DESCRIPTION OF NEW CIRCUITS
PanP CIRCUIT
(1) Operation principle
Picture in picture (indicated as PIP hereafer) is a
system to insert
a
picture with reduced size(sub
picture) in the
TV
picture.
The operation is described simply below. For PIP, the
picture memory is required because of the following
2 points and it uses digital processing.
75!'2
unbalanced type
A68KRT370X
13cm x Scm
~
x
2~
12cmX6cm Xl
6cmX4cm X2
12~X2+10W
AC200V /200V 50Hz
130W(l98\ll)
45.0
76. OX 59. 0X49. 5
Japan
CD
The main picture and sub picture are not sync-
hronized.
Fig.l PIP system configuration
®
Picture compressinon processing
Fig.l shows the configuration diagram.
The process to reduce the NTSC picture signal to
1/9
of the di sp I ay area is shown as an examp I e.
The
A/0
converted digital
data
is compressed to lH
from 3H and written in the memory (lMbits).
This is
76H
of the effective display area of
228H.
By
this process, the
vert
i
ca I
size is reduced to
1/3.
Reading fran the memory is done synchronized with the
main picture.
Reading at triple the writing speed reduces the
hor i zonta
I
size to
1/3.
The specifications for processing the sub picture are
shown be I
ow.
eReso I uti on of the sub picture : 230 I i nes
ep i nP function
G)
Sub picture posit i ens : 4 (top I eft, bottom left,
bottom right and top right)
~
Display ON/OFF function
~
Sti II picture function
~
Exchanging main and sub pictures
~
4-picture strobe function
eSampling rate
Y : 15MHz
R-Y : 3. 75MHz
B-Y : 3. 75MHz
&Quantization :
6
bits
~»System
PAL/SECAM/NTSC
-8-
Scanning I ine
~;
...~
I
:.J•
·''
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