Specifications

Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 75L04.6HU CA 9.
the settings for favorite stations, customer-preferred settings,
and service / factory data.
The on-screen graphics and closed caption decoding are done
within the microprocessor where they are added to the main
signal.
The chassis uses a Switching Mode Power Supply (SMPS) for
the main voltage source. The chassis has a 'hot' ground
reference on the primary side and a cold ground reference on
the secondary side of the power supply and the rest of the
chassis.
9.2 ATSC Module
9.2.1 Block Diagram
Figure 9-2 Block diagram ATSC module
The module functionality includes digital cable and terrestrial
reception and processing, digital terrestrial (8VSB ATSC) and
digital cable (QAM & 8VSB ATSC) free to air reception and
processing, and S/PDIF audio output possibility (coaxial). The
ATSC module provides its own OSD (On Screen Display)
capsulated in the main video output and handles EPG (digital,
based on PSIP information), CC (digital) and V-Chip (digital).
The module can be controlled via RS-232C by a host controller.
The ATSC module has one physical RF input for cable or
terrestrial. The CAS-2 IC sends the serial Transport Stream to
the MPEG-2 decoder after demodulation of the digital 8-VSB
ATSC RF (Terrestrial or Cable) and 64-256 QAM (Cable in-the-
clear). The MPEG2 Transport Stream is routed to the ZR39640
IC where it is parsed into video, audio, and data streams. After
the video stream decoding, processing, and conversion, the
video is coming out of the module on the main video output
(480i, analogue YUV). The audio stream is decoded,
processed, and DA converted, and is coming out of the module
on the audio output (analogue L/R, standard or Dolby-
ProLogic down-mixed – and S/PDIF).
Table 9-1 ATSC module connector pinning overview
RF
I2C
5V, 3.3V, 2.5V, 1.8V
RF Loop-through to Analogue Tuner
Power 10V
UART
V
U
Y
L/R
Power On, Reset
TS
DTV board
MPEG
Decoder
ZR39640
TV
chassis
512B
EEPROM
4MB
Flash
32MB
DDR
RS-232 (SW download)
S/PDIF Out
(CAS-2)
ATSC/QAM
IF
IF section
(SAW & Amp)
Tuner
F_15760_007.eps
141105
Pin No Signal Name Name Explanation
Connector P1206
1 Rx RS-232 Rx
2GND GND
3 Tx RS-232 Tx
4 RESET# Module Reset Signal
Connector P1212
1 Y Video Y signal out to TV chassis
2GND GND
3 U Video U signal Out to TV chassis
4GND GND
5 V Video V signal Out to TV chassis
Connector P1219
1 R_OUT Audio Right signal out to TV chassis
2GND GND
3 L_OUT Audio Left signal out to TV chassis
4GND GND
5 Reserved Reserved
Connector P1582
1 10V Supply
2 10V Supply
3GND GND
4GND GND