Scanlab RTC6 PCIe Board - Pulse Synchronization Mode

RTC6 boards
Doc. Rev. 1.0.21 en-US
7 Basic Functions for Scan Head Control and Laser Control
208
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7.4.11 Pulse Synchronization Mode
The Pulse Synchronization Mode:
• Delays the output of a LASER1 pulse until a new
clock signal pulse of the laser at
DIGITAL IN1 pin
(1)
is detected, see also Figure 61.
• Is enabled by
set_laser_pulse_sync( Mode > 0 )
• Is disabled
by set_laser_pulse_sync( Mode = 0 )
Observe the following when selecting the parameter
values:
• By set_laser_pulse_sync( Delay ), the
LASER1 signal can be delayed by a fixed value.
The Delay value must be  the period set by
– set_laser_pulses
– set_laser_timing
– set_laser_pulses_ctrl
– set_auto_laser_control
• For a Delay value  (2 × HalfPeriod from
set_laser_pulses), the following applies:
– The first LASER1 pulse is delayed by the
Delay value
– The subsequent LASER1 pulse is ignored
• The LASER1 signal pulse length remains
unchanged and depends on the preceding
configuration (for example, by set_laser_pulses).
Notes
• The supplied clock signal must be a TTL signal.
The minimum pulse length or pulse pause of the
clock signal should be 80 ns. See also
Chapter 4.6.1 ”LASER Connector”, page 73,
Section ”2-Bit Digital Input Port”, page 74.
• By Bit #5 of set_laser_control, it can be set
whether to use the rising or falling edge of the
external clock for synchronization.
• Pulse Synchronization Mode can be combined
with “Spot Distance Control” as well as with the
other variants of “Automatic Laser Control“ such
as PulseLength or HalfPeriod, see Chapter 7.4.9
”“Automatic Laser Control“”, page 197.
• Pulse Synchronization Mode can be combined
with Laser Mode 4 or Laser Mode 6.
• Pulse Synchronization Mode cannot be combined
with laser modes that use LASER2 signal
(CO
2
Mode, Pulse Picking Laser Mode). Pulse
Synchronization Mode because:
– It only affects the LASER1 signal
– It does not change the LASERON signal
– It does not change the LASER2 signal
• Pulse Synchronization Mode should not be
combined with cycle synchronization, see
Chapter 7.4.10 ”Synchronization of the RTC6
Clock Cycle and an External Clock Signal
”,
pag
e 207.
(1) At the LASER Connector, see Figure 17.