Reference System - Sony Betacam SX DNW-A100 Maintenance Manual

1-13. Reference System

1-13. Reference System
For each reference signal in this unit, an external reference video signal (*1) or input video signal (*2) is
automatically selected by the setting of the OUT REF switch on the sub control panel, the setting of setup
menu ITEM-309, and the operation mode (PB/EDIT/REC) of this unit. (Refer to the table below.)
For the reference signal (clock) of an analog video signal in an A/D converter, however, the analog video
signal itself is used as a reference signal at all times.
Menu ITEM-309 EXT
OUT REF switch —————
Operation mode —————
Video input A/D
Video output process
Digital audio
Servo system
Disk system
*1: REF. VIDEO input
*2: The input video signal is selected by the VIDEO INPUT SELECT button on the upper control panel.
n
. EDIT (INT) ; Internal Edit
Edit of tape to hard disk
. EDIT (LINE) ; Line Edit
This edit operation is performed for an SX format tape or hard disk only.
Independent Recording of Audio Signal
Even if an input video signal is selected as the reference signal, the reference signal is automatically
selected to an external reference video signal for the period in which the no input video signal is input.
The reference signal generated in the inside of this unit is automatically selected for the period in which
no external reference video signal is input.
An audio signal can be independently recorded by this system even if no reference video signal is input
from the outside.
Alarm Display for Video Input Signal and Reference Signal
1. Blinking of the VIDEO INPUT SELECT indicator
The selected signal indicator blinks when signal is not entered in the input connector selected by the
VIDEO INPUT SELECT button.
2. Blinking of the STOP button
The button blinks when the reference signal is not locked to an input video signal.
(This function can be inhibited in setup menu ITEM-105.)
. When the OUT REF switch is set to "INPUT VIDEO"
The STOP button blinks when the signal is not entered in the input connector selected by the VIDEO
INPUT SELECT button.
. When the OUT REF switch is set to "REF"
The STOP button blinks in either of the following cases.
When no reference signal is input to REF VIDEO INPUT connector.
When the reference video signal (REF.VIDEO input) is not synchronized with an input video signal
selected by VIDEO INPUT SELECT button.
1-26
PB EDIT (INT)
(*1)
External Reference Video
AUTO
REF
EDIT (LINE) REC
(*2)
Input Video
INPUT VIDEO
—————
DNW-A100/A50/A45
DNW-A100P/A50P/A45P