Photron FASTCAM-PCI R2, Hardware Manual

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FASTCAM-PCI R2 Hardware Manual
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3.4.3 Sync Timing in Multi-Camera Operation
In multiple-camera operation of FASTCAM-PCI R2 cameras, if sync and trigger signals are
connected in series as shown below, signal delay inevitably becomes obvious. In extreme cases,
this delay may cause an offset of one full image frame between cameras involved in
multiple-camera operation. To avoid this drawback, other connection methods shown in 2.4.2. are
recommended.
3.4.3.1. Magnitude of Delay - Vertical Sync Signal:
A delay of up to 60 nsec is caused between SYNC IN and OUT within a slave board.
3.4.3.2. Magnitude of Delay - TTL Trigger Signal
A delay of up to 1.3 µsec is caused between T-TTL IN and TRIG OUT within a slave board.
Master Board
Slave Board
TRIG OUT
SYNC OUT
SYNC IN
T-TTL IN
TRIG OUT
SYNC OUT
Slave Board
SYNC IN
Slave Board
SYNC OUT
Under 60 nsec
Slave Board
T-TTL IN
Slave Board
TRIG OUT
1.3 µsec ± 0.1 µsec.