3.1 Laser and controller configuration
21
3.1.2
DLC configuration
Although the
FSC
can be configured for either internal or external
sweep, it is significantly simpler to use the internal sweep mode and
set the
DLC
as a slave device as follows:
•
Connect the “
SLOW OUT
” of the
FSC
to the “
SWEEP / PZT MOD
”
input of the
DLC
.
•
Set
DIP9
(“External sweep”) of the
DLC
to enabled. Ensure
that
DIP13
and
DIP14
are off.
•
Set
DIP3
(“Bias generation”) of the
FSC
to disabled
•
Set
SPAN
on the
DLC
to maximum (fully clockwise).
•
Set
FREQUENCY
on the
DLC
to zero (using the
LCD
display to
set “Frequency”).
•
Ensure that
SWEEP
on the
FSC
is “
INT
”.
•
Set
FREQ OFFSET
to mid-range and
SPAN
to full on the
FSC
and observe the laser scan.
•
If the scan is in the wrong direction, invert
DIP4
of the
FSC
or
DIP11
of the
DLC
.
It is important that the
SPAN
knob of the
DLC
is not adjusted
once
set as above, as it will impact the feedback loop and may prevent
the
FSC
from locking. The
FSC
controls should be used to adjust the
sweep.
2
The DLC automatically generates the current feed-forward (“bias”) from the
sweep input, so it is not necessary to generate a bias within the FSC.
Summary of Contents for FSC100
Page 1: ...Fast servo controller FSC100 Version 0 1 2 Rev 2 4 hardware ...
Page 4: ...ii Contents ...
Page 14: ...10 Chapter 1 Introduction ...
Page 22: ...18 Chapter 2 Connections and controls ...
Page 36: ...32 Appendix B 115 230 V conversion ...
Page 39: ......
