6
Step What to do
Check
1
Connect a dummy diode between
LD+ and LD-. Alternatively make a
short circuit there.
Refer to section “Test Load”.
Range of compliance voltage
0 V .. 20 V.
2
Set the working point of the LDP-
CWL to modulation mode (Mod.).*
There are three different working
points: CW mode, modulation
mode and manual mode.*
Refer to the section “Description
of the Connectors of the LDP-
CWL 06-20 / LDP-CWL 12-20”
3
Connect GND, V
cc
on power
connector (power source yet
disabled).
Range of V
cc
15 V .. 48 V.
Minimum 10 V above compliance
voltage. Required max. current is
about 7 A - 13 A.
4
Connect waveform generator on
input terminal (no pulse before
power supply enabled, 0 V at current
set pin (10. pin of the pin header).
Refer to all sections referencing
input (connector #2).
5
Enable the power source.
Crowbar LED is on (red)
6
Adjust max. current scaling of the
crow-bar.
Use the Set_Imax potentiometer 1
(refer to the picture 1 above) for
scaling of the crowbar. Scale:
3 A/V
(example: 4 V at MP1 would
limit the output current to 12 A)
.
7
Disable (reset) the crowbar by
toggling the 7. pin of the pin header
(set low and then high 7. pin;
“Disable / reset crowbar”).
Crowbar LED is off (no light)
8
Feed a signal on the input terminal
(current set pin (10. pin). For
example 1 kHz sine wave with 1 V
amplitude and 0.5 V DC offset while
Make sure not to overload the
laser diode or the driver.
Range of input signal 0 V .. 4.8 V.
(0.4 V/A)
Summary of Contents for LDP-CWL 06-20
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