Ext. Sync Card - Studer OnAir 3000 Service Instructions Manual

3.4

Ext. Sync Card

Sync Priority
SCORE LIVE/PRO EXT SYNC CARD A943.0331
EXT LOCK
LED
Video Ref.
Input
WCLK In
AES/EBU In
Solder/Crimp View
(or Socket View)
WCLK Out
AES/EBU
Out1
AES/EBU
Out2
AES/EBU
Out3
Date printed: 28.02.11
The SCore Ext. Sync card acts as a connector panel for audio clock syn-
chronization inputs and outputs. Three inputs (VIDEO IN, WCLK IN, and AES
SYNC IN) can be used; their signals are sent to the SCore Live sync bus on the
backplane. While the video sync is separated on the card, the other signals
are just driven onto the bus. A green LED indicates that the applied external
sync is used by the system. The system clocks can be used from the WCLK
OUT and AES 3x OUT outputs.
Important
If the system is using MADI links, the deviation of the external sync signal
from the nominal clock frequency must not exceed ±100 ppm. If no MADI
links are used, a deviation of ±2500 ppm is tolerated.
The sync source is automatically selected according to the following table:
Clock Source
Video
AES/EBU
Wordclock
Internal
Current consumption (5 V)
Operating temperature
Video
Sync
Separator
15 8
9
1
Priority
1
2
3
4
SCore Live
A943.0331
approx. 100 mA
0...40° C
Backplane
SCORE LIVE
Sync Bus
SCore Live 21