Cheetah Python Camera with USB3 Interface
–
User Manual
December 5, 2017
Page
49
of
78
Rev 1.0
AcquisitionAbort
: Aborts acquisition immediately without completing the current frame
or waiting on a trigger. If acquisition is not in progress, command is ignored.
ExposureMode
: Sets the operation mode of the exposure. Options are:
•
Off
–
the exposure is free running.
•
Triggerwidth
–
uses an external pulse to control exposure. The trigger pulse
width (duration) determines the exposure subject to limitations. (TriggerMode
must be set to “ON.”)
•
Timed - uses the value specified in the ExposureTime parameter field to
determine exposure.
ExposureTime
: Sets the exposure time in microseconds when Exposure Control is set to
Timed. The maximum exposure time is equal to the frame period. For longer exposure
times, increase the frame period using the Acquisition Frame Time feature.
AcquisitionFrameRateEnable:
Controls the acquisition frame rate. If this mode is On, you
can extend frame time beyond the free-running frame time lowering the frame rate.
AcquisitionFrameTime
: Allows you to set the actual frame time in microseconds. Changes
to Acquisition Frame Time affect the Acquisition Frame Rate setting (5.2.1.2 Frame Time
Control).
AcquisitionFrameRate
: Allows you to set the acquisition frame rate (in Hz with a precision
of 0.01 Hz) (5.2.1 Internal Line and Frame Time Control and 5.3.3 Factors Impacting Frame
Rate). Changes to Acquisition Frame Rate affect the Acquisition Frame Time setting.
PixelClock
: Defines how fast the camera outputs pixel data. Decreasing the pixel clock
rate allows you to match the camera USB3 output rate to the computer capture rate.
Increasing the pixel clock rate increases the camera output rate (5.2.1.1 Pixel Clock Rate
Control).
CurrentExposureTime:
This is a read-only feature providing a real-time monitor of the
camera exposure time in micoseconds.
CurrentFrameTime:
This is a read-only feature providing a real-time monitor of the
camera output period in mico-seconds.
MinMaxExposureTime
: Describes the minimum allowable (first byte) and maximum
allowable (last 3 bytes) exposure times for Timed exposures.
TriggerMode
: Enables or disables the triggering operation.
TriggerSoftware
: The Start SW Trigger command instructs the camera to generate one
short trigger pulse to capture and read out one frame.
TriggerSource
: Specifies the internal signal or physical input line to use as trigger source.
Options are External Input Line1, External Input Line2, PulseGenerator, and Software
(Software is a single frame capture using internal exposure setting). (5.5 Camera
Triggering).
TriggerActivation
: Selects the triggering edge to Rising or Falling (5.5.2 Acquisition and
Exposure Control).
TriggerDebounce
: Selects the trigger signal de-bounce time. Subsequent trigger signals
coming to the camera within the de-bounce time interval are ignored (5.5.2 Acquisition
and Exposure Control).
