Pike
Technical
Manual
V5.2.3
152
Description of the data path
Description
of
the
data
path
Quick parameter change timing modes
Why new timing modes?
Former
timing
of
the
Pike
cameras
showed
the
same
behavior
as
Marlin
cameras:
•
Frame
rate
or
transfer
rate
is
always
constant
(precondition:
shutter
transfer
time)
•
The
delay
from
shutter
update
until
the
change
takes
place:
up
to
3
frames.
demonstrates
this
behavior.
It
shows
that
the
camera
receives
a
shutter
update
command
while
the
sensor
is
currently
integrating
(Sync
is
low)
with
shutter
setting
400.
The
camera
continues
to
integrate
and
this
image
is
output
with
the
next
FVal.
The
shutter
change
command
becomes
effective
with
the
next
falling
edge
of
sync
and
finally
the
image
taken
with
shutter
200
is
output
with
a
considerable
delay.
•
Parameters
that
are
sent
to
the
camera
faster
than
the
maximum
frame
rate
per
second
are
stored
in
a
FIFO
and
are
activated
in
consecutive
images.
Principally
a
Pike
camera
is
not
able
to
recognize
how
many
parameter
the
user
will
change.
Due
to
the
fact
that
communication
between
host
and
camera
is
asynchronous,
it
may
happen
that
one
part
of
parameter
changes
is
done
in
image
n+1
and
the
other
part
is
done
in
image
n+2.
To
optimize
the
transfer
of
parameter
changes
there
is
a
new
timing
mode
called
Quick
Format
Change
Mode,
which
effectively
resets
the
current
shutter.
Note
Configuration
To
configure
this
feature
in
an
advanced
register,
see
Figure 71: Former standard timing
Shutter Update Command
Current Charge Time
Sync
FVal
400
200
integrates image
with
with shutter eg 400
continues integrating
outputs image
with shutter 400
outputs image
with shutter 200
shutter 200
