FASTCAM-512PCI Hardware Manual
- 15 -
2. Using External Sync Generator
The figure below shows an example of connection using an external sync generator.
To avoid any possible delay of sync and trigger signals between boards, this connection is highly
recommended, unless using software triggering (see Subsection 3.3. Timing Charts).
(The connection of SYNC OUT
→
SYNC IN and TRIG OUT
→
T-TTL IN is not recommended for
the above-mentioned reason though operates either.)
Recommended Connection
The characteristic of the circuit configuration inside the 512PCI camera inevitably causes a slight
error of
±
22.98 nsec against the input sync signal.
Example: For 10,000 Hz input sync signal, the actual frame rate in each camera is:
100 usec
±
22.98 nsec = 9,998 fps to 10,002 fps
SYNC IN
T-TTL/SW
IN
External Sync
Mode
SYNC
OUT
TRIG OUT
SYNC IN
T-TTL/SW
IN
External Sync
Mode
SYNC
OUT
TRIG OUT
SYNC IN
T-TTL/SW
IN
External Sync
Mode
SYNC
OUT
TRIG OUT
SYNC IN
T-TTL/SW
IN
External Sync
SYNC
OUT
TRIG OUT
External
Signal
Generator
Sync Signal
Trigger
Signal
Camera ID: 0
Camera ID: 1
Camera ID: 2
Camera ID: 3
Trigger
Generator
External
Signal
