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Chapter 2. ICL 11
shift_mode_is( );
Shift Image and Storage. This is a parallel shifting mode that shifts the entire parallel register. This mode can
be used on all CCDs and uses the normal clocking method that is equivalent to MPP off. The exception is for
CCDs that require MPP clocking, and, in this case, MPP on is used.
shift_mode_is_alt( );
Shift Image and Storage, Alternate. This is a parallel shifting mode that shifts the entire parallel register. This
mode can be used on all CCDs and uses the normal clocking method that is equivalent to MPP off. The
exception is for CCDs that require MPP clocking, in this case, MPP on is used. In addition to the MPP style of
shifting, this function uses an alternate shifting mode (see shift). Unless an alternate shifting was loaded at
the factory, this mode is loaded with a default value identical to
shift_mode_is
.
shift_mode_ism( );
Shift Image and Storage, MPP. This is a parallel shifting mode that shifts the entire parallel register. This mode
can only be used on CCDs that support MPP clocking. If this mode is used on a non-MPP CCD, the script
compiler generates an error and fails.
shift_mode_ism_alt( );
Shift Image and Storage, MPP, Alternate. This is a parallel shifting mode that shifts the entire parallel register.
This mode can only be used on CCDs that support MPP clocking. If this mode is used on a non-MPP CCD, the
script compiler generates an error and fails. In addition to using MPP clocking, this function uses an alternate
shifting mode (see shift). Unless an alternate shifting was loaded at the factory, this mode is loaded with a
default value identical to
shift_mode_ism
.
shift_mode_s( );
Shift Storage. This parallel shifting mode shifts only the storage array on a frame-transfer CCD. This mode can
only be used on frame-transfer CCDs. If this mode is used on a non-frame-transfer CCD, the script compiler
generates an error and fails. This function uses the normal clocking method that is usually equivalent to MPP
off. For CCDs that require MPP clocking, the clocking method is MPP on.
shift_mode_s_alt( );
Shift Storage Alternate. This parallel shifting mode shifts only the storage array on a frame-transfer CCD. This
mode can only be used on frame-transfer CCDs. If this mode is used on a non-frame-transfer CCD, the script
compiler generates an error and fails. This clocking is equivalent to MPP off except for CCDs that require MPP
clocking. In this case, the clocking would be equivalent to MPP on. In addition to the MPP style of shifting,
this function uses an alternate shifting mode (see shift). Unless an alternate shifting was loaded at the
factory, this mode is loaded with a default value identical to
shift_mode_s
.
shift_mode_sm( );
Shift Storage, MPP. This parallel shifting mode shifts only the storage array on a frame-transfer CCD. This
mode can be used on CCDs that support both MPP clocking and frame transfer. If this mode is used on a non-
MPP or non-frame-transfer CCD, the script compiler generates an error and fails.
shift_mode_sm_alt( );
Shift Storage, MPP, Alternate. This parallel shifting mode shifts only the storage array on a frame-transfer
CCD. This mode can be used only on CCDs that support both MPP clocking and frame transfer. If this mode is
used on a non-MPP or non-frame-transfer CCD, the script compiler generates an error and fails. In addition to
the MPP style of shifting, this function uses an alternate shifting mode (see
shift
). Unless an alternate
shifting was loaded at the factory, this mode is loaded with a default value identical to
shift_mode_sm
.
shutter_close( );
This function closes the shutter. Once the
shutter_close_delay
time has passed, this function continues on to
the next script instruction. Since there is no default shutter position, and if the shutter position is important to the
current script, set the shutter open or closed at the start of the script program. Note that none of the other script
instructions (except for
shutter_open
, of course) alters the shutter state. Specifically, none of the
expose