Instruction manual
Guppy Technical ManualV7.4.0
158
Controlling image capture
One-Shot
The camera can record an image by setting the one-shot bit in the 61Ch register.
This bit is automatically cleared after the image is captured. If the camera is
placed in Iso_Enable mode (see Chapter ISO_Enable / free-run on page 161),
this flag is ignored.
If one-shot mode is combined with the external trigger, the one-shot command
is used to arm it. The following screenshot shows the sequence of commands
needed to put the camera into this mode. It enables the camera to grab exactly
one image with an external trigger edge.
If there is no trigger impulse after the camera has been armed, one-shot can be
cancelled by clearing the bit.
Note
• Exposure times entered via the 81Ch register are mirrored
in the extended register, but not vice versa.
• Longer integration times not only increase sensitivity,
but may also increase some unwanted effects such as
noise and pixel-to-pixel non-uniformity. Depending on
the application, these effects may limit the longest
usable integration time.
• Changes in this register have immediate effect, even
when the camera is transmitting.
• Extended shutter becomes inactive after writing to a for-
mat/mode/frame rate register.
Note
One-shot and Interlaced and Format_7 Mode_1 produces an
image, where the first field has different brightness due to
principal reasons.
Figure 95: One-shot control (SmartView)