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17874-D03
T-Cube Laser Diode Driver
Open Circuit LED
- If the electrical connection to the laser diode gets interrupted (i.e.
the output goes open circuit) the internal protection circuit disables the laser output
and turns on the Open Circuit LED. After the fault is cleared, the laser output can be
re-enabled.
Error LED
- lit when the photodiode current is out of range. If this LED is lit, then the
photo current and optical power readings are potentially incorrect. The most probable
cause is that the photodiode current gain was not optimized during the configuration
process - see Section 4.4. or Section 5.4.
Identify LED
- when this button is pressed, the front panel POWER LED and digital
display of the associated controller T-Cube will flash for a short period.
Settings display
- shows present values of the following user specified settings:
Max Laser Current
- the maximum current limit of the laser diode being driven -
see Section 5.4. or Section 4.4.
Polarity
- the polarity of the lase r diode, either
Anode Grounded
or
Cathode
Grounded
.
TIA Range
- the photo diode current limit, set via the rear panel PD RANGE
microswitches - Section 3.8.
Step Size:
the step size used when the Step buttons are clicked.
Settings button
- Displays the 'Settings' panel, which allows the operating
parameters described above to be entered - see Section 6.2.
6.2
Settings Panel
When the 'Settings' button on the GUI p anel is clicked, the 'Settings' window is
displayed. This panel allows data such as front panel display units and input sources
to be en tered. Note that all of these parameters have programmable equivalents
accessible through the meth ods and properties on this Con trol (refer to the
Programming Guide
in the
Server online helpfile
(accessed via the Windows ‘Start’
menu) for further details.
