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1-1. Circuit Description
EN-141 board
YRGB signals sent from the PR-248 board are converted to Y/R-Y/B-Y signals in the matrix circuit,
added with the REF signal of the CCU, and output to the camera adaptor.
The R-Y/B-Y signals are converted to chroma signals in the encoder circuit, and added with the Y signal
to generate the VBS signal.
The R, G, B and VBS signals selected are sent to the TEST OUT connector and RM (remote controller).
The zebra, character and cursor, etc. are added for the VF signal.
The external synchronization for single usage is performed as follows. The GENLOCK signal input to the
camera adaptor is separated into the EXT SYNC signal and EXT SC signal. The EXT SYNC signal is
sent to the PR-248 board, compared with the SC signal input from PR-248 board to control the frequency
of the 4 Fsc oscillator. In single use. The 4 Fsc generator serves as the reference signal source of the
camera.
(4) System control block
The AT-128 board performs information control inside the camera and information exchange with outside
using the 32-bit RISC microprocessor. The CCU performs communication using serial data via the
camera adaptor. The main functions of the system control block are as follows.
. Controls the camera based on information from the CCU
. Transmits camera head information such as self-diagnosis results and iris position to the CCU
. Control of various files
. Transmission and reception of OHB files with the microprocessor in the CCD unit
. Auto setup
. Generation of characters for the viewfinder
1-4 (E)
BVP-9500WS/9500WSP MM
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