CN-3653 Board (HSC300RF/100RF)
This board relays DC power voltage (+180 V) from the camera control unit through a fiber cable, and sends the DC
power voltage to the PS-879 board (power block assembly) as the power of the main unit.
CD-78 Board (HSC300R/100R)
The main-line video signal that is input from the DPR-358 board is encoded by the encoder, and the encoded signal is
sent to the OFDM modulator IC.
The OFDM modulator IC multiplexes this main-line video signal, the audio signal from the SY-430 board, and the
command signal. This multiplexed signal is modulated to 2-channel signal and is then converted to an analog signal.
This analog signal is sent to TX-148 board.
Furthermore, the CD-78 board receives the stream signal demodulated by OFDM from the TX-148 board and separates
the stream signal to return video signal, prompter signal, intercom audio signal, and command signal.
The prompter signal is decoded to baseband signal by the decoder, and the baseband signal is sent to the SY-430 board.
The audio signal and the command signal are sent to the SY-430 board.
TX-148 Board (HSC300R/100R)
The video signal and the audio signal that are modulated by OFDM on the CD-78 board are sent through the MPX filter
to the FL-377 board.
The RF return and prompter signals sent from the camera control unit are sent through MPX filter to the demodulator
IC. The RF signals are demodulated by the OFDM demodulator IC, and are then sent to the CD-78 board.
FL-377 Board (HSC300R/100R)
The RF signal and the DC voltage (+180 V) sent from the camera control unit with the TRIAX cable are separated from
each other.
The separated RF signal is sent to the MPX filter on the RX-148 board with the coaxial cable.
The DC power voltage (+180 V) is sent to the PS-879 board (power block assembly) as the power voltage for the unit.
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System Control System
SY-430 Board
This board consists of control circuits, a synchronizing separator circuit, a video amplifier, and an audio circuit.
The FRAM (IC404, IC405) retains system setup data, paint data, and other data.
Control system
The CPU on the AT-189E board controls external inputs/outputs and internal devices of the unit via the PLD (IC1001).
This PLD has the following functions.
• 700 protocol communication between this unit and the REMOTE connector on the camera control unit
• Parallel communication with the DPR-358 board, SDI-117 board, and CD-78 board
• I²C communication and 3-wire serial communication with the CCD block
• I²C communication with the viewfinder
• I²C communication with the front panel, rear panel, and intercom panel
• Signal input from the two rotary encoders (front and rear)
• Tally output to the handle and TRACKER connector
HSC300RF/HSC100RF/HSC300R/HSC100R
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