1-2
OVERVIEW
1.1 Explanation
- HD PERSONAL VIDEO RECORDER & RECEIVER or PVR(Personal Video Recorder)-STB(Set-Top Box)
stores video and audio data into HDD with a specific form while receiving the ground wave of HD digital
broadcasting only or gives additional related services.
- Configuration
It uses IBM PPC405GP of PowerPC series as CPU, which supports PCI Bus I/F for PVR. VSB section exe-
cutes VSB decoding for ATSC signal with IF(44MHz) as an input entered from the tuner and transfers TP
data by decoding ATSC signal via VSB decoding to PVR section and HD-1.
MPEG Decoder supports MP@HL by using HD-1 and uses an external AC-3 Decoder.
PVR section stores only necessary data of TP data from the digital TV signal into HDD via IDE I/F chip.
The overall structure is as follows:
- System section
CPU, Main Memory, MPEG-II Decoder, AC-3 Decoder, Flash Memory, Audio DAC, CPLD
- PVR section
PCI I/F, PDR-Pro executing TP De-Mux, Memory, IDE I/F Chip
- VSB section
Generate TP signal by transferring the IF of the desired channel from the RF signal received from the tuner
to VSB receiver.
- Front section
Receive various user key inputs and display the status of the set-top box on the LED.
- Power section
Supply the DC power to the main digital board and HDD by using AC 120V as an input.
Summary of Contents for HDR230
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Page 37: ......
Page 38: ...3 17 3 18 4 WAVEFORMS 1 DIGITAL SYSTEM CLOCK GENERATOR PART 1 2 3...
Page 39: ...3 19 3 20 2 DIGITAL SYSTEM SYSTEM MEMORY PART 1 2 3...
Page 40: ...3 21 3 22 3 VIDEO PLL PART 1 2...
Page 41: ...3 23 3 24 4 VIDEO OUTPUT CONNECTOR PART 1 2 3 BMK800 BMK800 BMK800 33PF 33PF 33PF...
Page 43: ...3 27 3 28 6 PVR CLOCK PART 1 2 3...
Page 44: ...3 29 3 30 7 VSB VSB DECODER PART 1...
Page 45: ...3 31 3 32 8 VSB DOWN CONVERTER PART 1...
Page 46: ...3 33 3 34 9 MICOM DOWN CONVERTER PART 1...
Page 47: ......
Page 65: ...3 74 3 75 10 VSB CIRCUIT DIAGRAM IF VSB TP Data clock error valid 03 3 15 HDR230 DNS...
Page 67: ...3 78 3 79 12 POWER IF COM VIDEO CIRCUIT DIAGRAM CVBS OUT Y OUT C OUT 03 3 15 HDR230...
Page 68: ...3 80 3 81 13 FRONT CIRCUIT DIAGRAM RIGHT LEFT 03 3 15 HDR230...
Page 69: ...3 82 3 83 8 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS TOP...
Page 70: ...3 84 3 85 2 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS BOTTOM...
Page 72: ...3 88 3 89 5 POWER PRINTED CIRCUIT DIAGRAM LOCATION GUIDDE...
