18
Mode Settings
XC-HR58
To Use High-rate Scan Mode (B)
In external trigger shutter mode 1, you can increase the
frame rate by setting the shutter speed to the trigger
pulse width, and setting the high-rate scan mode
switch on the rear panel, the trigger interval, the
external VD phase and the external VD width.
The image is centered as shown below.
Notes
• In external trigger shutter mode, video out signals are
output about 1 H later than the external VD.
• In high-rate scan mode, image output and the WEN
rising edge are always synchronized, but the WEN
width becomes undefined. High-rate scan mode
cannot be used in external trigger shutter mode 2.
1 H
BLKG interval Tb [line]
Effective image interval X [line]
Trigger interval T [line]
X lines
580 lines
External VD
Video out
WEN
Trigger
External VD
width Tw [line]
The image output is terminated by inputting of the
trigger falling edge.
Note that input of a trigger pulse is needed in the
effective image interval to control the ending of image
output, and this affects the image synchronization with
the timing of the trigger rising edge.
