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72 NIRvana
™
-LN System Manual Issue 4
8.2 Timing {Trigger Response} Modes
The selected
Timing
{
Trigger Response
} mode determines how the NIRvana-LN
responds to a trigger received on the
TRIGGER IN
line on the
AUX I/O
port located on the
rear of the camera. See Figure 8-1 .
Figure 8-1: Rear Panel Connectors on NIRvana-LN Detector
When configuring the trigger input, consider the following criteria:
•
Pulse Height
0 to +3.3 V
DC
logic levels (TTL-compatible).
•
Pulse Width (trigger edge frequency)
The time between trigger edges.
• Trigger In Connector Impedance
High impedance.
•
Edge Trigger {Trigger Determined By}
Rising (+) or Falling (-) Edge must be specified on the
Experiment Setup —>
Timing
tab {
Trigger
expander}.
The timing modes are combined with the
Shutter Control
{
Shutter Mode
} options, the
widest variety of modes for precision experiment synchronization are provided. Supported
Timing
{
Trigger Response
} modes for Full Frame operation include:
•
Free Run {No Response} ;
• External Sync {Readout Per Trigger} ;
•
Bulb Trigger {Expose During Trigger Pulse} ;
• Trigger Start {Start On Single Trigger} .
NOTE:
Although it continues to be supported, Clean Until Trigger is no
longer required due to improvements that have been made to the
NIRvana-LN timing sequence.
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