Photron Fastcam SA2, Hardware Manual

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49 FASTCAM SA2 / SA2 RV Hardware Manual
3.16. Using External Synchronization Signals
An external synchronization mode to synchronize to an external signal is provided on the system. By
using an external synchronization signal, recording can be conducted using multiple cameras to
synchronize the timing of the shots or to also synchronize the shots with external measuring devices
and lighting. The procedure and precautions for using the external synchronization signal are
explained below.
3.16.1. Inputting an External Synchronization Signal
An external synchronization signal can be input with the system. See the chart below for external
synchronization input settings.
Menu Display Contents Signal (Input Signal Conditions)
OFF
Turns external synchronization off,
operates independently.
(none)
ON CAM POS
Synchronizes to a positive polarity signal
from the system.
TTL Level, Positive Polarity
ON CAM NEG
Synchronizes to a negative polarity signal
from the system.
TTL Level, Negative Polarity
ON OTHERS POS
Synchronizes to a positive polarity signal
from an external device
(including other Photron products).
TTL Level, Positive Polarity
ON OTHERS NEG
Synchronizes to a negative polarity signal
from an external device (including other
Photron products).
TTL Level, Negative Polarity
3.16.2. Outputting an External Synchronization Signal
The system can externally output a synchronization signal. Output of the external synchronization
signal is performed from the GENERAL OUT connector explained in section “2.2.7. See the chart
below for external synchronization output settings.
Menu Display Contents Signal Type I/O delay amuont
SYNC POS
Outputs a positive polarity
vertical synchronization signal. CMOS (74ACT541 buffer)
output, positive polarity
Approx. 160nsec
SYNC NEG
Outputs a negative polarity
vertical synchronization signal. CMOS (74ACT541 buffer)
output, negative polarity
Approx. 170nsec