
955-0002_v3.2, Rev-A1 COPYRIGHT © 2012 RED Digital Cinema
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The Video Genlock input may be used as a vertical interval reference signal for the sensor and HD-SDI
outputs when precise synchronization is required between cameras, such as for 3D and live broadcasts.
Note: When GENLOCK is selected as the sensor shutter reference, shutter start timing (SHUTTER
PHASE) may still be adjusted. HD-SDI monitor outputs will automatically sync to the external
GENLOCK signal as soon as it is detected, there is no need to enable this function. Sensor shutter
sync to GENLOCK is only supported with HD-SDI.
View into camera SYNC (Video Sync) Interface connector
Mating Connector: FGG.00.304.CLAD27Z
PIN SIGNAL DESCRIPTION
1 GROUND Common Ground
2 SS/GPI Shutter Sync / GPI Trigger Input
3 TIMECODE SMPTE unbalanced timecode Input
4 GENLOCK RS170A Tri-Level Sync Input
NOTE: The Camera Brain’s Shutter Sync / GPI Trigger uses a 3.3 V Schmitt trigger (5 V tolerant),
current supplied by the trigger source. Both edges of the input signal may be used as a trigger.
For example, when GPI trigger is used for Record Start / Stop.
• Start Record: On Ground to 3.3 V transition
• During Record: Hold at 3.3 V
• Stop Record: On 3.3 V to Ground transition
• During Stop: Hold at Ground
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