Atsc, Sd And Pc Card Input Signal Flow - Panasonic TH-37PX50U Technical Manual

ATSC, SD and PC Card Input Signal Flow

Figure 22
The ATSC interface (DT board) processes the ATSC, NTSC, and QAM television
signals. It also processes the Photoviewer (JPEG) data of the SD and PC cards. The
composite, luminance and chrominance, or component video signals of the DT board
are output to the DG board via the connector DT12/DG22.
The DT-Board has the ability to tune in the 8VSB ATSC terrestrial TV broadcast and the
16VSB DVB cable television. If a cable line is used without a Cablecard, the unit
proceeds to scan all available analog and digital channels. If a CableCard is used, the
scanning process is bypassed since all cable related information is already programmed
in the CableCard. If a terrestrial antenna is used, the unit may be instructed to scan only
analog or digital terrestrial broadcast. The unit may also be instructed to scan all analog
and digital broadcast channels.
The DT board contains an Optical Audio Out jack for use with a Dolby Digital decoder
and a multi-channel amplifier. When a digital channel is selected, the output from the
Digital Audio Out jack will be Dolby Digital. The same jack outputs PCM (Pulse Code
Modulation) when any other signal source is selected.
All TV related OSD information such as channel numbers, program channels, etc is
generated within the DT board.
As the OpenCable service changes, the firmware information located in the DT board
may be upgraded through the use of an SD card. The Photoviewer SD card slot is used
for the upgrade.
27