version 1.5 rev 4 Dec 2019
36
Sona &
Marana
Parameter
Minimum
Maximum
Exposure
1 Row
30 s
Cycle Time (1/Frame Rate)
Greater of:
1 Frame + 1 Row or Exposure time + 1 Row
FIRE Any low period
~5 μs in 12-bit and ~10 μs in 16-bit (1 Row)
4.7.6 R
olling
s
HUtteR
e
xteRnal
/ s
oftWaRe
t
RiggeRing
(n
on
-o
veRlap
M
ode
)
In this section, both External and Software Trigger are described in the same diagram as the acquisition sequence is
the same. The trigger event can either be from the EXT Trigger input or sent via software. The ARM signal is asserted to
indicate it is ready to detect an incoming trigger input.
Once the trigger event is detected a rolling reset is initiated, this effectively begins a new exposure. When the exposure
period has completed, a signal frame read out phase begins. Once the frame has been read out completely the Arm
signal goes high and the camera waits for the next trigger event to be detected.
The external trigger is fed via the EXT Trigger input on the I/O Connector on the camera head.
Figure 11: External Triggering “short” (non-overlap)
