Owner's manual

8
5440A–IMAGE–10/05
ATMOS -2M60/2M30 [Preliminary]
• Readout of frame N. The readout data is forwarded to the Camera Link interface (FVAL
active) starting with the first line
• Readout of dummy frames (to prevent against large dark current integration) while the
camera waits for the next trigger event
The trigger delay is a few µs. The minimum pulse duration is 1 µs. The edge of trigger is pro-
grammable. The source of trigger is selectable between Camera Link CC1 signal and TTL/IO
trigger input. The period is defined by readout time + programmable shutter time + readout time
+ wait. Therefore the minimum period is 2
× readout time.
See register Aperture Shutter Time @ 246H, Internal Register Mapping on page 16.
Figure 4-3. Triggered Mode Chronogram
4.1.4 Triggered Mode without Full Reset
Principle: An external trigger starts the snap and readout of a frame, without resetting the sen-
sor. The integration time is defined by readout time (+ programmable shutter time, when used).
The trigger event initiates the following sequence:
• Stop of readout frame in progress and reset of readout pointer to line 1
• Shutter output signal is activated during a time programmable within 0 to Tsh range by step
of T1
Table 4-2. Shutter Time Values at Triggered Mode
Label Description 2M60 2M30
Tsh Maximum shutter time (ms) 655 1310
T1 Step duration (µs) 10 20
Line 1 reset
Line 1
Integration
(Frame N)
Frame N
Readout
Line n
Integration
(Frame N)
Line n Reset
Line 1 Readout
and Reset
Trigger N EventTrigger In
Programmable
Shutter Time
Shutter out
Trigger Delay
FVAL
Line n Readout
and Reset