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12. Digital Decoder R763826
The colour difference signals are first passing a low-pass filter, and then mutliplexed according the ITU standard. The Y, on the other
hand, passes a high pass filter and then a delay compensation.
In a last stage, a multiplexer “selects” the decoder output or the R/R-Y, G/Y or B/B-Y matrixed signals.
Digital processing - Scaling.
The digital processing consists of an acquisition control, pre-scaler for horizontal down-scaling, line buffer with asynchronous read
and write for vertical up-scaling, a vertical scaling section and output formatter.
The video scaler receives its input from the video decoder or from the expansion port (X-port, and not used here).It gets 16-bit
Y-CR-CB 4:2:2 input data at a continuous rate of 13.5MHz. It is sorted into a luminance path and time multiplexed chrominance
path. If it is a 4 : 1 : 1 format it is converted to 4:2:2 first.
The 8-bit Y-CR-CB output from the decoder, real time and unscaled ,is available at the bi-directional expansion port (X-port) from
where it is sent to the PMP board via the connector J3.
12.3.3 Power Supply
Power diagram for Digital decoder
1
31
30 60
J3
LED D17
Image 12-3
Power Supply for Digital decoder
GREEN LED D17: illuminates when the decoder is locked (Vertical & Horizontal lock and Colour detected)
Power Supply test points
Image 12-4
Power supply measurement points
84
R5976820 SLM R12+ PERFORMER 08/03/2005
Summary of Contents for SLM R12 Plus
Page 1: ...SLM R12 Performer Service Manual R9010170 R9010171 R5976820 00 08 03 2005...
Page 8: ...Table of contents 6 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 12: ...1 Safety 10 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 36: ...5 SLM R12 P Location of the Fans 34 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 56: ...8 Local Keypad LCD Display 54 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 82: ...11 Signal Input Selection R763850 R763851 80 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 90: ...13 Digital Inputs Backplane R763378 88 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 126: ...15 Lamp Power Supply R7633705 124 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 130: ...16 Start Pulse Generator SPG R763512 128 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 168: ...22 Infra Red Receiver Module R763261 166 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 174: ...24 Projector Tilt Switch R764240 172 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 178: ...25 Light Output Sensor R763294 176 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 182: ...26 Lamp Info Module R763295 180 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 258: ...27 Maintenance 256 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 274: ...29 Overview of the Electrical Diagrams 272 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 280: ...Index 278 R5976820 SLM R12 PERFORMER 08 03 2005...