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1-9. Circuit Description
1-9. Circuit Description
1. Power Supply Block3. Signal Processing Block
A voltage of +12 Vdc output from the DC IN connector isPLL is established and clocks are generated, with the BVH
sent through the power switch on the SW-988 board to the(TP101) signal output from DVBK-1 as reference.
DC-DC converter on the SY-266 board. A reverse-The timing pulses required for each signal processing and
insertion prevention diode and IC link (for overcurrentconversion are generated by IC104, IC110, and IC115 on
protection) are used for circuit protection.the DIF-74 board and sent to each IC and DVBK-1, with
The DC-DC converter generates each DC voltage requiredthe digital composite sync (TP100) signal output from
for the DIF-74 and SY-266 boards.DVBK-1 as reference.
The video and audio signals input from the DV IN connec-
2. System Control Blocktor are decoded and expanded from DV compression by
DVBK-1 and converted into a baseband signal.
The control signal input to the REMOTE connector
converts a communication format and is outputted to theThe video signal converted into a baseband signal is
LANC connector.outputted from the SDI OUT connector through the
The control signal input to the LANC connector exchangesconversion process below:
a communication format and is outputted to the REMOTE
connector. The communication format is exchanged by4:1:1 to 4:2:2 8 4:2:2 to D1 8 D1 ENCODE
CPU (IC105) on the SY-266 board.(IC103)(IC210)
The editing precision during simplified editing is improved8 NRZ ENCODE 8 Parallel to Serial Conv.
(IC217)(IC217)
by executing the learning (using the LEARN switch on the
rear panel) and memorizing the mechanical response
characteristics of DV or DVCAM connected to this unit inThe audio signal converted into a baseband signal is
EEPROM (IC103) on the SY-266 board.outputted from the SDI OUT connector through the
processing and conversion process below:
Format Conv. 8 LEVEL/Mute Processing
(IC115)(IC115)
8 Sampling Rate Conv. 8 Time-base Compression
(IC201)(IC209)
8 Mulitiplex with Video Signal 8 NRZ ENCODE
(IC210)(IC217)
8 Parallel to Serial Conv.
(IC217)
BKNW-251-9 (E) |
ACEC
