Software reference (CDU) i--SPEED 2
66
i--SPEED LT, i--SPEED 2
This point is somewhat esoteric but is none the less very important.
In order to fully explain the timing of the data logging, the data
display is presented on the CDU along with a reference frame
diagram. The diagram shows the previous frame, the current frame
and the exposure period. The data log is also shown and it is
drawn in the position from which the data was collected. Thus it will
be seen that a shutter of x1 causes collection from the current
frame,
while a shutter of x2 c auses collection from the previous as well as
the current frame.
Since the end of data c ollection is synchronised with the end of the
exposure period, it will be understood that a shutter of x200 causes
collection of almost all the data from the previous frame.
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