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5.4 EXTERNAL SYNC (VIDEO REFERENCE) OPERATION
External Sync Overview
In video production/post production facilities, a high-quality, stable video signal
must be maintained throughout the production cycle. Since the stability of a video
signal involves accurate timing of sync pulses and vertical blanking intervals, all
equipment used in video production houses must be locked to a master, facility-
wide clock signal. This clock signal is variously called “Video Reference”, “House
Sync,” “Black Burst,” or “RS-170.” (While the nature of these signals vary slightly
depending on the needs of the facility, the basic function is the same as far as
RADAR II is concerned.)
House Sync enables RADAR II to maintain a stable lock to any time code generated
in the facility. And, when using RADAR II in conjunction with high-end video
equipment (such as D2 and Digital Betacam), RADAR II’s house sync capability
enables flawless digital audio transfers while locked to time code.
Positional Sync
Video Reference provides RADAR II with a synchronization signal only - and does
not contain time code information. Therefore, RADAR II’s video reference feature
enables you to select the source for “positional” sync– this could be SMPTE time
code, MIDI time code (MTC) or RADAR II’s internal clock. In the case of
SMPTE or MIDI time code, the sync timing comes from the incoming video
reference, while the position information comes from the incoming time code.
Video Reference Operation
1.
From the Session Controller, press the Offset/SYNC button.
The system
will respond with the SYNC SOURCE dialog described earlier.
2.
Using the cursor up/down keys (or Jog wheel), select VIDEO:
2.
Press ENTER.
The system will respond with the Video Reference (sync
rate) dialog, as shown. This dialog has three choices - NTSC at 59.94 fps,
NTSC at 60 fps, or PAL at 50 fps.
E X T E R N A L S Y N C H R O N I Z A T I O N F E A T U R E S
5-11
Edition 1
Summary of Contents for RADAR II
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