RED EPIC OPERATION GUIDE
COPYRIGHT © 2013 RED.COM, INC
955-0002_v4.0, REV-C
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SYNC (VIDEO SYNC)
A 4-pin LEMO connector supports shutter synchronization, GPI, timecode and genlock input signals.
The shutter Sync input signal acts as an immediate response hardware trigger to commence a scan. This is
useful for motion control and other applications where the camera is driven by a master timing device. When
using SYNC as the camera shutter timing reference, fine shutter start time timing (SHUTTER PHASE) is
disabled; make any desired timing adjustments at the external SYNC generator.
Alternatively, this input may be used as a GPI (General Purpose Input) trigger, whose function is
programmed in the USER KEYS menu. Default function for the GPI trigger is Record Start / Stop.
The SMPTE timecode input provides a frame accurate time stamp for each frame of recorded video. External
TC must be chosen in the Project > Timecode menu. When SMPTE timecode is detected it will align the
internal TC value to the external TC signal at every :00 frame crossing of the external TC signal.
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). It is not a
switch closure circuit. Therefore, it requires current supplied by the trigger source. Both edges of the input
signal may be used as a trigger.
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