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Chronos 1.4 - Page 79

Chronos 1.4
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Page | 79
TRIGGER / IO SETTINGS [CONTINUED]
Control
Function
Shutter Gating
Sets function of IO to control the start and length of exposure for each frame.
Normal recording is prevented if this mode is selected without a valid signal.
Frame Sync
Output
Sets function of IO to frame sync output. Output will be active when the shutter
is open. Can be inverted with by selecting the Invert checkbox.
Pullup
Enables 1mA or 20mA pullup on trigger input. Enabling both will result in a
21mA pullup. There is a 5k-ohm pulldown resistor on the input, which defaults to
a low-level.
When pullups are enabled, current is driven into the trigger and the logic level
rises. The input can be pulled low externally by shorting the BNC connector to
ground. Pullups will bring the voltage level to 4-5V, with no load.
A tutorial on this subject can be found at https://www.krontech.ca/tutorials/.
None
Disables the associated IO.
Invert
(Trigger Input)
When checked, the trigger input will be sensitive to a low logic level, as opposed
to a high logic level.
Example: The recording would end when the external trigger cable button is
pressed, rather than when it is released.
Debounce
Use a 10 millisecond debounce filter on the input. This is recommended when
using a physical button or switch as the trigger source to avoid glitches due to
mechanical contact bounce.
Input Status
Shows the real-time level of 3 inputs, after optional inversions are applied.
Apply Button
Applies IO settings without closing the window.
OK Button
Applies IO settings and closes the window.
Cancel Button
Discards changes and closes the window.

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