Board (Only In Hscu300Rf) - Sony HSCU300RF Service Manual

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 or SDP-19 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. (The SDI PROMPTER signal is available only when HSCU-300R is connected. The HSCU300RF does
not support SDI Prompter.)
- 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.
1-11-4. SDP-19 Board (only in HSCU300RF)
The SDP-19 board performs processing for main-line signals from the camera and return signals to the camera.
• Main-line signal processing
The optical signal sent from the camera adapter is converted to an electrical signal by the optical module, and the
electrical signal is input to the transmit signal processor circuit (IC100). The serial/parallel conversion and the 10b/
8b conversion are applied to the input serial signal, and then the converted signal is separated to camera video
signal, audio signal, trunk signal, income signal (CAM → CCU), and command signal (CAM → CCU). Only the
video signal among these separated signals is LVDS-converted. Other signals are sent directly to the DPR-361
board.
• Return signal processing
The return video signal, prompter video signal, and income signal (CCU → CAM) that are sent from the DPR-361
board are superimposed by the transmit signal processor circuit (IC100) with the command signal (CCU → CAM)
as HD-SDI signal. The superimposed signal is 8b/10b-converted and P/S-converted, and then the converted signal
is converted to an optical signal by the optical module. Then this optical signal is sent to the camera.
Furthermore, the SDP-19 board has a function to detect the optical signal reception state. With this function, the reception
state of the CCU and the camera adapter is indicated on the LED.
HSCU300RF/HSCU300R
1-22