Shad-o-Scan User Manual, Rev04
36
Shad-o-Scan 3001/4501 X-Ray Detector
Teledyne DALSA
Read-Out Modes
Free Running
Mode (Master)
In this mode the detector will run continuously on internal timing. No trigger input is
required to initiate a frame read-out. The frame rate is determined by the time
between successive frame read-outs which can be set by the Exposure or Framerate
feature.
In this mode the sensor will integrate and read-out continuously even when the host
does not acquire any images. However, the trigger output is suppressed when no
images are acquired, this is useful to see at what moment an integration period will
be acquired and streamed to the host system.
When a grab is started the next integration period will be acquired and sent to the
host system. If a grab is started but the sensor is still in the integration period this
frame will be dropped and the following frame will be send to the host system; this to
avoid changes to the sensor during the integration period (which can happen before
acquiring images).
Row #
Pixel Array
Time
ReadOut
Integration
Time
Frame (N)
Frame (N+1)
Trigger Input
Frame Blanking
interval
Sensor Data Output
B
C
FreeRunning Mode
A
Operation mode
Binning 1x1
3001
Binning 1x1
4501
Binning 2x2
3001
Binning 2x2
4501
Binning 4x4
3001
Binning 4x4
4501
Max frame rate
1403 FPS
970 FPS
2703 FPS
1950 FPS
2703 FPS
1950 FPS
A: min integration
time
0.712 ms
1.014 ms
0.369 ms
0.513 ms
0.369 ms
0.513 ms
B: readout time
0.712 ms
1.014 ms
0.369 ms
0.513 ms
0.369 ms
0.513 ms
C: frame blanking
interval (Exposure
Time) (A-B)
1 us
–
60s
1 us
–
60s
1 us
–
60s
1 us
–
60s
1 us
–
60s
1 us
–
60s
Figure timing diagram 'free running'