Table of Contents
Advertisement
Video Signal Processing Circuit
Video processing of the DPR-361 board is performed for two systems: one is main-line system to transfer video signals
of each channel to the rear panel, and the other is return system to transfer return video and prompter signals from the
rear panel to the camera.
• Main-line system video signals are sent as LVDS signals from the DM-152 board. The video signals are
demodulated to baseband signals by the demodulator circuit (IC2000) and then receive the following processes
according to each output.
- SDI output:：
The audio signal and the synchronization signal are superimposed on the video signals, and the superimposed
signal is converted to HD-SDI or SD-SDI signal, and then the serial signal is output from the rear panel.
- Analog component output:
The HD-YPbPr or SD-YCD signal that is output from the video signal processor circuit (IC1500) is RGB-
converted according to the output format setting, and the converted signal is D/A-converted. Then the converted
analog signal is sent to the rear board.
- VBS output:
The SD-YCD signal that is output from the video signal processor circuit (IC1500) is converted to VBS signal
by the encoder circuit (IC1101), and the VBS signal is D/A-converted for each PIX, VBS, and WFM output.
Then each converted analog signal is sent to the rear board.
• The return and prompter signals that are input from the DPR-361 board and the rear board can handle HD-SDI,
SD-SDI, and VBS signals. These signals are switched and the specified signal is selected and sent back to the
camera.
- Phase matching is performed for HD-SDI signals.
- SD-SDI signals are converted to pseudo-HD signals by the up-conversion processing, and phase matching is
performed for the pseudo-HD signals.
- VBS signals are digitized to the level equivalent to the SD digital component signal, and are then processed
in the same way as SD-SDI signals.
In addition to these circuits for the main-line and return signal processing systems, the DPR-361 board contains a
character generator for CCU menu output, a WFM stair case signal generator, and an EEPROM that retains signals for
the component/VBS video level adjustment data.
1-10-4.
CN-3661 Board
CN-3661 board provides two channels of MIC signal output.
1-10-5.
CN-3662 Board
The CN-3662 board is connected to the DPR-361 board with flexible wire to output SD analog signals (PIX and VBS
signals) to external devices. This board also outputs REFERENCE, PROMPTER, and RET input signals from external
devices to the DPR-361 board.
The INCOM/TALLY/PGM connector for interface with external devices outputs input signals to the DPR-361 board.
The 28 V power for the RCP generated on the PS-739D board is output from the CN-3663 board through the CN-3662
board.
The fan power FAN 12V is generated from 15 V on the CN-3662 board and is output. This board also detects fan
operation.
1-10-6.
CN-3663 Board
CN-3663 board outputs the RCP signal and SYNC/WF signals.
HXCU-TX70
1-18
Hide quick links:
Advertisement
Table of Contents
