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1-5 (E)
HDCU-900 MM
1-3-2. HKCU-901
. IF-789A/789P board
The IF-789A/789P board is used in combination with the RC-86 board for interfacing the SD signal of
the main line using an analog interface.
It has a built-in digital composite encoder and color bar generator that are used to generate the compos-
ite output signal, the component output signal and the monitoring output. It also performs D/A conver-
sion of these signals.
It has a return signal processing block that converts the analog composite input signal into the 4:2:2
digital component signal and interfaces it with the RC-86 board.
In addition, it has a built-in external sync circuit of the SC (sub-carrier).
. VDA-57 board
The VDA-57 board is an interface board that interfaces the SD analog signal with external equipment.
It supplies the composite and component SD analog signal, the monitor output, and SD-SYNC output,
and accepts the return input signals (four systems).
1-3-3. HKCU-902
. ADA-59 board
The ADA-59 board is not equipped with the corresponding front board as its pair. It performs the D/A
and A/D conversions of the HD signal. This is the interface board with the external analog equipment.
It accepts the component output of the two systems, monitor output and HD-SYNC output, and also
supplies the return (single channel, four systems).
1-3-4. HKCU-903
. FC-83 board
The FC-83 board is a frame conversion board that converts a 24P picture into a 60i picture using the 2
to 3 pull-down method.
The FC-83 board has three built-in converter circuits in total (two circuits for the main output and for
the circuit board in the bottom shelf of the main line system, and one conversion circuit for the return
system picture). In the return system circuit, the return signal undergoes reverse-conversion of that of
the main line signal.
The board is equipped with a monitor output for outputting the signals that have already undergone the
marker and skin gate processing to be used for monitoring.
It also has an auxiliary reference input circuit for operating at multiple frame frequency. The auxiliary
reference input circuit detects the frame sync point of both the main reference and sub reference
signals, and establishes the frame lock of the sub reference signal with the main reference signal.
. SDI-54B board
The SDI-54B board is an interface board that interfaces the coaxial HD-SDI signal with external equipment.
It supplies the main line output signal and the monitor output signal. It accepts the return (four systems)
input, sub reference input and supplies SYNC (two systems) output.
1-3-5. HKCU-904
. LC-41 board
The LC-41 board is a line conversion board that converts the 1080-60i or 540-60P picture into the 720-
60P picture. It contains two converter circuits (for the main line system and return system). In the return
system circuit, the return signal undergoes reverse-conversion of that of the main line signal.
. SDI-54C board
The SDI-54C board is an interface board that interfaces the coaxial HD-SDI signal with external equipment.
It supplies the main line output signal and the SYNC (two systems), and accepts the return (four
systems) input.
1-3. Circuit Description