Figure 37. Free Run Timing Diagram; Figure 38. Single Trigger Timing Diagram - Princeton PIXIS-XB System User Manual

Chapter 6 Advanced Topics 59
Window Size. Integrate signals (SHUTTER {Shutter Open}) or Readout signals (NOT
SCAN {Not Reading Out}) are provided at the LOGIC OUT connector for timing
measurements.
Example: Referring to the readout shown in Figure 32, there are 6 pixels perpendicular to
the shift register and the Window Size is 2 pixels high. The number of frames is 3. If the
Vertical Shift rate for the CCD is 1600 ns/row, the Shift time will be 3200 ns per frame.

Figure 37. Free Run Timing Diagram

Triggered Modes
In single trigger mode, the camera requires only one trigger to initiate an entire series of
"exposure-shift" cycles as shown in the timing diagram below. When Acquire or Focus
{Run} is clicked, the shutter (if there is an external X-ray shutter) is opened and the
camera uses the exposure time as entered in the software. The trigger is applied at the
Ext Sync connector on the rear of the PIXIS-XB. After the series is complete, the
shutter closes and the CCD is read out at normal speeds. Once the readout is complete,
the camera is ready for the next series of exposures. This timing is shown in Figure 38,
where a single External trigger pulse is used to collect a burst of 6 frames.

Figure 38. Single Trigger Timing Diagram

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