Applying New Parameters; Firmware And Camera Start - THORLABS DCU223x Operation Manual And Sdk

DCx Cameras
). Alternatively, you can keep the control feature enabled so that it responds to deviations from the target value.
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Control speed
You can set the auto function speeds in a 0–100 % range. This influences the control increments. High speed
(100 %) causes a little attenuation of a fast-responding control and vice versa. The control functions for average
brightness and for color rendering use separate speeds.
In trigger mode, every frame is evaluated for automatic control. The freerun mode skips a number of frames by
default because in that mode, changes to the image parameters only become effective after one or more image
captures (see also

Applying new parameters

IS_SET_AUTO_SKIPFRAMES), you can select how many frames should be skipped in freerun mode (default: 4).
This parameter strongly influences the control speed. Choosing small values can destabilize the automatic control.
Note
For higher frame rates select for the "Skip frames" parameter a bigger value. This reduces the number of
automatic adjustments that must be done by the camera.
Hysteresis
The automatic control feature uses a hysteresis function for stabilization. Automatic control is stopped when the
actual value lies in a range between (setpoint - hysteresis value) and (setpoint + hysteresis value). It is resumed
when the actual value drops below (setpoint - hysteresis value) or exceeds (setpoint + hysteresis value). If the
hysteresis value is increased, the control function will stop sooner. This can be useful in some situations.
See also:
is_SetAutoParameter()
2.6.4 Applying New Parameters
New capture parameters (such as exposure time or gain settings) can be transferred to the camera via software at
any time. Depending on the operating mode, these settings will not always be immediately effective for next image,
however.
Freerun mode
In freerun mode, the camera is internally busy with capturing the next image while new parameters are
transmitted to the camera. Depending on the exact time of transmission, new parameters might only come into
effect two or even three images later.
Trigger mode
In this mode, the camera reverts to idle state between two images. When you change the camera parameters,
the new settings will be applied immediately to the next image.

2.7 Firmware and Camera Start

Every DCx camera has its own firmware that handles internal processes in the camera. The camera firmware
varies from model to model.
USB DCx Cameras have a two-tier firmware that is uploaded to the camera each to you connect it to a PC:
1. Common firmware (uc480 boot)
The general firmware identifies what camera model you have connected, and uploads the corresponding
firmware.
2. Model-specific firmware (e.g.: uc480 DC1240x series)
The model-specific firmware is named after the camera type and provides the functions of the relevant model.
Note
When you connect a USB DCxCamera with a Windows PC or a new USB port for the first time, it is detected as a
new device. This is normal standard behavior of the operating system.
The USB DCx Cameras firmware is part of the driver. The automatic upload always loads the firmware that
matches the driver installed in the camera.
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). With the "Skip Frames" parameter (API parameter
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