Teledyne Princeton Instruments Nano-XF, System Manual

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Chapter 6: Operation Modes
Data acquisition and the transfer of a single frame of data is initiated by a trigger signal
from some trigger source, previously selected via a camera control function. The
source of the trigger can be an external electrical pulse (Trigger state is ON) or the
trigger will be generated within the Controller (Trigger state is OFF). The polarity of an
External Trigger signal is user-programmable and the input may be at the Trigger-In
BNC connector on the rear panel or via the Camera Link interface.
6.1 Free Run Mode (Trigger State is OFF)
6.1.1 Free Run
When the trigger state is set to OFF, the camera operates in Free Run (Continuous
Video) mode. This mode requires no external control signals and provides high frame
rates by overlapping the readout time with the exposure time. An internally generated,
fixed frequency trigger signal initiates the readout of the current frame and starts the
exposure time for the next frame. The frame rate is controlled internally. Integration
time is programmable. See
Figure 6-1 .
Figure 6-1: Free Run Mode - No External Trigger
6.1.2 Minimum Integration Times for Free Run Mode
Minimum integration times listed in Table 6-1 were measured by setting the integration
time to 0. The times were measured from the Clear pulse to the falling edge of the V3
pulse (shift charge to vertical shift registers).
4
4
11
-01
16
_011
Table 6-1: Free Run Mode: Minimum Integration Times
Sensor Taps Speed Minimum Integration Time
KAI-11002 1 30 MHz
312

s
2 30 MHz
245

s