Princeton Instruments NIRvana-LN, User Manual, Page: 78 / 122

78 NIRvana
™
-LN System Manual Issue 4
Additional related signals and configuration settings include:
• Logic 1
{
Always High
}
TTL OUT
is always pulled HIGH (1).
• Wait for Trigger
{
Waiting For Trigger
}
TTL OUT
goes HIGH (1) when the camera is ready to acquire and is waiting for an
external trigger from the
TRIGGER IN
signal before exposing the CCD.
TTL OUT
goes LOW (0) once a trigger has been detected and exposure has started.
The
Wait for Trigger
(
WFT
) signal goes high immediately after readout or, if it is
active, after
Pre Open
{
Open Before Trigger
}.
Before the next cycle begins, TRIGGER IN is checked again, and exposure will
start if a trigger has occurred.
• Invert LOGIC
{
Invert Output Signal
}
When checked,
TTL OUT
is treated as an
Active LOW
signal.
• Effectively Exposing
TTL OUT
is HIGH (1) when the sensor is exposed as requested.