Pco dicam C1, User Manual

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7.3 DOUBLE IMAGE MODE 4 CHANNELS
After the functionality of double image timing for one channel has
been explained in chapter
6.2 , the interaction of all four channels of a
pco.dicam C4 in double image mode will be explained.
For typical ultra-speed applications the pco.dicam C4 is operated in
‘burst’ mode; i.e. the eight images are recorded within a few
microseconds or even less, the following readout of the eight images
causes a gap of at least 38.4 ms of ‘dead time’ until the next eight
image ‘burst’ can be captured.
This ‘burst’ mode can be configured by setting up and triggering
each channel individually or more comfortably by using the
Common
Time Properties (see chapter 9 ) and a single Master Trigger input
(see rear panel A2.4 ).
Note that using double image mode with a P43 phosphor equipped
image intensifier requires interframing times of > 1ms. Ultra fast
sequences of 8 images are therefore not feasible with P43 phosphor.
Timing Diagramm
for a single eight image burst using Master Trigger
Order of timing using
Master Trigger
•
Arming Signal:
≥
9.5 ms
•
Exposure Trigger
• Fixed Intrinsic Delay
o
20000 ns + 70 ns
o
For electrical Master Trigger additional delay: 10 ns
o
For optical Master Trigger additional delay: 15 ns
•
Selectable Start Delay
•
Double Exposures of all 4 channels sequentially interlinked
Condition for the sequential interlinking the four channels
The time distance between
Exposure 1
and
Exposure 2
taken on the
same channel has to be at least 300 ns / 500 ns (depending on your
pco.dicam version) according to the minimum of the interframing
time.
NOTICE