RTC
®
4 PC Interface Board
Rev. 1.3 e
4 Principle Of Operation
32
innovators for industry
4.6 Laser Control
The RTC
®
4 provides several laser control signals
with programmable pulse width and frequency.
These signals can be used for controlling various
types of lasers.
Via the command set_laser_mode (see page 108),
the user can choose one of four different laser control
modes:
•CO
2
Mode (conceived of for controlling CO
2
lasers)
• YAG Modes 1, 2 and 3 (three variants conceived
of for controlling Nd:YAG and related lasers)
• Laser Mode 4 generates a continuously-running
control signal.
Depending on the selected mode, different laser
control signals are available. These signals are
described in the following sections.
All laser signals are TTL signals. They can be set to
either active-high or active-low with a jumper. See
"TTL Laser Signal Level", page 59, for details.
Notes:
• The command set_laser_mode must be called
during initializing the RTC
®
4 for selecting the
laser control mode. After the initialization the
laser control is activated. During operation the
selected laser signals can be deactivated via the
control command disable_laser (page 80) and
again reactivated via the control command
enable_laser (page 80). The command
get_startstop_info (see page 85) (Bit #9)
provides information about the current status of
the laser control.
• All laser signals are TTL signals. They can be set to
either active-high or active-low with a jumper. See
"TTL Laser Signal Level", page 59, for details.
The maximum current load for all laser signals is
10 mA. If jumper X6 has been configured to
replace the ANALOG OUT 1 signal with +5 V, then
the maximum current load at pin (4) of the laser
connector is 100 mA.
The signals are available via the 9-pin D-SUB
laser connector – see page 52.
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