Photron FASTCAM Multi, Hardware Manual

Page: 58 / 81

Chapter 4 Functions
44
4.7. IRIG Time Code (External Time Synchronization)
The system supports IRIG-B input and can add an IRIG code to each recorded frame. The sample
timing for the IRIG code is once each frame.
The recorded IRIG code is displayed on the “Photron FASTCAM VIEWER” software.
IRIG Code Input Specification
Connector BNC
Code Format IRIG-B (122) Analog
Amplitude 1.0Vp-p min,8.0Vp-p max
Mark to space ratio 3:1 to 6:1
Typical modulated carrier signal ratio 10:1

IRIG Time Code is used when synchronizing a camera with external equipment in time.
It is a convenient function when apparatus is physically separated.

When the IRIG code is being input, the IRIG code is displayed in white, and is displayed to the left.

The IRIG offset time is also displayed below it. When the IRIG code is not being input, the IRIG
code is displayed in grey. At that time, the counter is the camera’s internal counter and it continues
to count.

Limitation of use of IRIG code
With the Image Trigger function, IRIG code cannot be used when the specified number of frames is
32 or fewer in RANDOM CENTER or RANDOM MANUAL trigger mode.