To Use High-Rate Scan Mode (B) - Sony XC-HR70 Technical Manual

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.
Trigger
External VD
Video out
WEN
Notes
• In 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.
Trigger interval T [line]
External VD
width TW [line]
1 H
BLKG interval Tb [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.
Effective image interval X [line]
Mode Settings
X lines 768 lines
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