Rainbow Electronics ATMOS™ 1M60 - Manual (Page 8)

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5429B–IMAGE–04/05
ATMOS -1M60/1M30 [Preliminary]
The trigger delay is a few µs. The minimum pulse duration is 1µs. The edge of trigger is pro-
grammable. The source of trigger is selectable between CameraLink 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 17 .
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
• Readout of frame N. The readout data is forwarded to the CameraLink 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 µ s. The minimum pulse duration is 1µs. The edge of trigger is pro-
grammable. The source of trigger is selectable between CameraLink CC1 signal and TTL_IO
trigger input. The period is defined by the programmable shutter time + readout time + wait.
Table 4-2. Shutter Time Values at Triggered Mode
Label Description 1M60 1M30
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 Event Trigger In
Programmable
Shutter Time
Shutter out
Trigger Delay
FVAL
Line n Readout
and Reset