Circuit Description; Hdcu3300 Common; Dpr-271A; Dpr-271B - Sony HDCU3300 Maintenance Manual

1-6. Circuit Description

1-6-1. HDCU3300 Common

Front Boards
AT-167S board
The AT-167S board has the built-in microprocessor (SH2-
DSP). It controls various circuit boards inside the
HDCU3300 and the power supply. It also performs the
system setup including a camera.
The board performs command communication with a
camera, and with RCP, MSU, or CNU.
Also, it enables Ethernet connection by the Ethernet
controller with the built-in microprocessor.
It has the built-in signal generator circuit generating HD
and SD. This signal generator circuit establishes gen-lock
with external (main) reference and also gen-lock between
HD and SD. It controls phase of all video signal outputs.
It has the sync output of one channel enabling to switch
between the HD ternary value sync signal and the SD sync
signal.
AVP-6 board
The AVP-6 board processes the audio signal, tally, and
trunk line. It has the following functions.
. D/A-converts and outputs the MIC signals supplied from
the camera in digital format.
. A/D converts the intercom signals (ENG/PROD/PGM/
Front-Intercom) input to the HDCU3300.
. Inputs the intercom signals sent from the camera in
digital format and the A/D-converted audio signals of the
HDCU3300 to the digital mix IC, and performs line
selection, mixing, and volume control.
. D/A converts the signals processed at the digital mix IC,
and outputs it to external circuits.
. R/G tally signal I/F
. Trunk line (RS-232C/422A) I/F
CPU-395 board
The CPU-395 board has a microprocessor (SH2) and
controls the video process on the DPR-271 board.
It also communicates commands with the camera and the
AT-167S board.
DTX-5 board
The DTX-5 board processes the return signals and the
prompter signals.
This board can handle the HD-SDI/SD-SDI/VBS signals as
return signals, and convert them to the specified signals
and send them back to the camera.
1-6 (E)
. Phase adjustment is performed on the HD-SDI signal.
. The SD-SDI signal is up-converted to the pseudo-HD
signal and its signal phase is adjusted.
. The VBS signal is converted to the digital signal equiva-
lent to the SD-Digital-Component signal, and processed
in the same way as the SD-SDI signal.
The signal input as a prompter is A/D-converted, embed-
ded to the return signal and then sent to the camera.
DPR-271A board
The DPR-271A board performs the super motion output
processing for the main-line signals from the camera.
. Phase adjustment and re-clocking using line memory
. Addition processing for generating the normal-speed
signal as necessary
. Flicker correction function as necessary
. Camera signal (gamma, knee, detail, etc.) processing
function
. Has the built-in HD color bar generator
. Matches the MIC signal from the camera to the delay of
the video signal, and then multiplexes it to the SDI
signal.
DPR-271B board
The DPR-271B board performs the HD-SDI output
processing for the main-line signals from the camera.
. Phase adjustment and re-clocking using line memory
. Camera signal (gamma, knee, detail, etc.) processing
function
. Has the built-in HD color bar generator
. Matches the MIC signal from the camera to the delay of
the video signal, and then multiplexes it to the SDI
signal.
DRX-5 board
The DRX-5 board processes the main-line signals from the
camera.
. Phase adjustment and re-clocking using line memory
. Down-conversion function as necessary
. Has the built-in HD/SD signal color bar generator and
supports multiple formats
. Matches the MIC signal from the camera to the delay of
the video signal, and then multiplexes it to the SDI
signal.
. Analog character output
HDCU3300/MM (J,E)