Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
Table 9-2 SAW filter diversity
Switching is done by the microcontroller via SAW_SW. In table
“SAW filter switching” is explained how to address the different
system standards.
Table 9-3 SAW filter switching
The hybrid tuner TDA1316AF, used in Europe sets, needs to
be switched between digital and analogue mode. This is done
by the microcontroller via DVB_SW. Refer to table “Hybrid
tuner digital/analogue switching” for details.
Table 9-4 Hybrid tuner digital/analogue switching
The pin assignment of all analogue tuners is equal and can be
found in table “Pin assignment analogue tuners”.
Table 9-5 Pin assignment analogue tuners
The pin assignment of the hybrid tuner can be found in table
“Pin assignment hybrid tuner”.
Table 9-6 Pin assignment hybrid tuner
9.4.2
Automatic Gain Control
In the LC7.2x chassis (digital sets), the automatic gain control
depends on if the set is receiving a digital or an analogue
signal. During analogue reception, the hybrid tuner receives an
external AGC voltage, coming from the demodulator, to
perform automatic gain control. During digital reception, no
external AGC voltage is used but the tuners internal AGC loop
is used.
In the LC7.1x chassis (analogue sets), the tuner receives an
external AGC voltage, coming from the demodulator, to
perform automatic gain control.
9.5
Video Processing
The video processing is completely handled by the Trident SVP
CX32 video processor which features:
•
CVBS-input for analogue signals
•
RGB-input for digital (DVB-T) signals
•
Motion and “edge-adaptive” deinterlacing
•
Integrated ADC
•
Built-in 8-bit LVDS transmitter
•
Colour stretch
•
Skin colour enhancement
•
3D Digital Comb Video Decoder
•
Interlaced and Progressive Scan refresh
•
Teletext decoding
•
OSD and VBI/Closed Caption.
SAW filter
Switching Y/N
Region Video/Audio
OFWK3953M
No
Europe
Video
OFWK9656M
Yes
Europe
Audio
OFWK7265L
Yes
AP
Video
OFWK9361L
No
AP
Sound
OFWK3956L
No
China
Video
OFWK3955L
No
China
Video
OFWK9352L
No
China
Audio
OFWM1967L
No
LATAM
Video/Audio
Region
SAW_SW
System
Europe
1
L’
0
other systems
AP
1
B/G, D/K, I
0
M/N
China
1
B/G, D/K, I
0
M/N
LATAM
n.a.
M/N
Region
DVB_SW
Mode
Europe
1
analogue reception
0
Digital reception
Pin
number
Description
DC voltage (V)
1
RF AGC voltage
3.3 - 4.5 (weak or no
signal) < 3.3 (strong signal)
2
n.c.
3
I
2
C-bus address select 0
4
SCL
0 to 3.3
5
SDA
0 to 3.3
6
n.c.
7
supply voltage
5
±
0.25
8
n.c.
9
tuning supply voltage
33
10
n.c.
11
TV IF output
Pin
number
Description
DC voltage (V)
1
n.c.
2
RF AGC voltage
3.3 - 4.5 (weak or no
signal) < 3.3 (strong signal)
3
I
2
C-bus address select 0
4
SCL
0 to 3.3
5
SDA
0 to 3.3
6
4 MHz reference
output
7
supply voltage
5
±
0.25
8
broadband IF output
9
IF AGC voltage
0 to 3
10
narrowband IF output
11
narrowband IF output
Содержание 32PFL7332/93
Страница 11: ...Mechanical Instructions EN 11 LC7 1A LA 4 Figure 4 3 Cable dressing 42 models H_17270_012 eps 060707 ...
Страница 30: ...Service Modes Error Codes and Fault Finding EN 30 LC7 1A LA 5 Personal Notes E_06532_012 eps 131004 ...
Страница 109: ...Revision List EN 109 LC7 1A LA 11 11 Revision List Manual xxxx xxx xxxx 0 First release ...