Laser Mode 4 - Scanlab RTC 5 PC Interface Board Installation And Operation Manual

7.4.6 Laser Mode 4

The command set_laser_mode(4) selects the laser
mode 4. The laser control timing diagram
shows the corresponding signals.
In this mode, a continuously-running modulation
signal with variable pulse length and frequency is
provided at the LASER1 output both for "laser active"
and for "laser standby" operation, if it is activated via
set_standby or set_standby_list.
Additionally, for "laser active" operation (if applicable
after a LaserOn delay and if enabled via
set_laser_control or enable_laser)
• The LASERON signal is switched on and
• A programmable FirstPulseKiller signal is
provided at the LASER2 output.
For "laser standby" operation, additionally the
LASERON signal and (if applicable) the LASER2 signal
are switched off (if applicable after a LaserOff delay).
Laser mode 4
Vector
Output
"Laser standby"
LASERON
LASER1
LASER2
(FirstPulseKiller)
Laser control timing diagram for laser mode 4 (with active-high laser control signals)
®
RTC 5 PC Interface Board
Rev. 1.9 e
7 Basic Functions for Scan Head and Laser Control
figure 50
Start of
Vector
LaserOn
Delay
"Laser active"
Standby
Period
FirstPulseKiller
Length
Notes
• The pulse length and the output period of the
LASER1 modulation signal are set with the
command set_standby
LASER1 signal is 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.
• The FirstPulseKiller signal is started together with
the LASERON signal. The length of the First-
PulseKiller signal is set with the command
set_firstpulse_killer or
(see page 423).
• In laser mode 4 the time base for the signals
LASER1 and LASER2 is always 1/64 µs (in RTC
mode) or 1/8 µs (in RTC
End of
Vector
LaserOff
Delay
"Laser standby"
Standby
Pulse Width
or set_standby_list. The
set_firstpulse_killer_list
®
5
®
4 compatibility mode).
Time
50
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