Pulse Picking Laser Mode - Scanlab RTC 5 PC Interface Board Installation And Operation Manual

• Note that half of the output period must be
specified.
• In laser mode 6 the time base for the LASER1
signal is always 1/64 µs (in RTC
®
(in RTC 4 compatibility mode).
• To mark points, you can use
to switch on the LASERON signal for a specified
number of external pulses (or a specified time
interval). The external pulses must be supplied at
the LASER connector's DIGITAL IN1 digital input
(see page 46). With para_laser_on_pulses_list, a
selected signal parameter will be linearly varied to
the supplied value during point marking.

7.4.8 Pulse Picking Laser Mode

The commands set_pulse_picking
set_pulse_picking_list select the pulse picking laser
mode. The laser control timing diagram in
shows the corresponding signals.
For "laser active" operation (if applicable after a
LaserOn delay and if enabled via
enable_laser):
• The LASERON signal is switched on
Pulse Picking Laser Mode
Vector
Output
"Laser standby"
LASERON
Standby
Period
LASER1
LASER2
(No = 2)
Laser control timing diagram for pulse picking laser mode (with active-high laser control signals and
®
RTC 5 PC Interface Board
Rev. 1.9 e
7 Basic Functions for Scan Head and Laser Control
®
5 mode) or 1/8 µs
laser_on_pulses_list
or
figure 52
set_laser_control or
Start of
Vector
LaserOn
Delay
Q-Switch Delay
Standby Q-Switch
Pulse Width
• A modulation signal is provided at the LASER1
output with pulse lengths and periods that can
be defined via set_laser_pulses,
set_laser_pulses_ctrl or
• The LASER2 output emits the same signals as the
LASER1 output (in phase), but only every No
pulse in accordance with the parameter No in
set_pulse_picking or set_pulse_picking_list.
For "laser standby" operation (if applicable after a
LaserOff delay):
• The LASERON signal is switched off
• Standby pulses are provided in phase at the
LASER1 and LASER2 outputs with pulse lengths
and periods that can be defined via
or set_standby_list.
You can activate constant pulse length mode (a
special case of the pulse picking laser mode) via the
command set_laser_control( bit #7 = 1). In this
mode, the "laser active" LASER2 signal is outputted
with a fixed pulse length that is independent of the
LASER1 signal (the desired LASER2 pulse length is
specified via the set_pulse_picking_length
command). This allows you to also use the LASER2
signal as a gate signal for short LASER1 pulses.
End of
Vector
LaserOff
Delay
"Laser active"
Q-Switch
Pulse Width
Period
No
= 2)
set_laser_timing
th
set_standby
"Laser standby"
Time
52
138