Scanlab RTC 5 PC Interface Board Installation And Operation Manual page 139

Notes
• As in YAG mode 5, the time interval between
LaserOn and the first Q-Switch pulse
(LASER1/LASER2) can be specified via
set_qswitch_delay or set_qswitch_delay_list.
The LASER2 signal synchronously starts with the
LASER1 signal.
• The LASER1/LASER2 signals are activated by
setting the pulse length to a nonzero value and is
deactivated by setting the pulse length to zero
(default setting).
• Note that half of the output period must be
specified for the LASER1/LASER2 signals.
• The commands set_laser_pulses
set_laser_timing are list commands. They can be
used within a list, for instance, for changing the
laser power at any time between two list
commands.
• The actual output period and the pulse lengths of
laser signals LASER1 and LASER2 (but not the
laser delays) are dependent on the time base.
®
For RTC 5 mode, this is fixed at 64 MHz (1 bit
equals 1/64 µs).
®
For RTC 4 compatibility mode (for "laser active"
operation), the time base can be set via
set_laser_timing (but not via
or set_laser_pulses_ctrl) for either 1 MHz (1 bit
equals 1 µs) or 8 MHz (1 bit equals 1/8 µs). For
®
RTC 4 compatibility mode, SCANLAB generally
recommends setting the time base to 8 MHz (via
set_laser_timing(..,..,..,1)). A time base of
1 MHz should only be chosen if necessary.
The time base for standby signals is always
®
1/64 µs (in RTC 5 mode) or 1/8 µs (in RTC
compatibility mode).
• The command set_laser_control
used to specify whether a (for "laser active"
operation) started modulation pulse (LASER1 or
LASER2) should execute to completion or be cut
®
RTC 5 PC Interface Board
Rev. 1.9 e
7 Basic Functions for Scan Head and Laser Control
off when it has not yet fully executed when the
LASERON signal is switched off (see
page
signals; if applicable, these will be cut off.
• The LASER1 signals may be set (via
set_laser_pulses
pulse-picking laser mode.
• set_pulse_picking
overwrite any laser mode setting previously set
via set_laser_mode. A subsequent laser mode
setting (via set_laser_mode) will switch off the
pulse-picking laser mode.
and
set_laser_pulses
®
4
(bit#0) can be
138). This cannot be specified for standby
etc.) prior to or after setting the
and set_pulse_picking_list
figure 52,
139