Last update: 2021/12/17 00:00 d2:laser_controller https://www.vescent.com/manuals/doku.php?id=d2:laser_controller
https://www.vescent.com/manuals/ Printed on 2021/12/18 07:41
switch in figure) and T2 Differential poles (second DIP switch
in figure) for units with S/N 2675 or higher (PCBs with S/N
6987 and higher)
T1
Prop.
On
0.47 s 1.0 s 2.2 s 4.7 s 10 s 22 s 47 s
On x
Off x x x x x x x
T1 Diff. On 0.1 s 0.22 s 0.47 s 1.0 s 2.2 s 4.7 s 10 s
On x x x x
Off x x x x
Tab. 4: Factory settings of T1 Proportional poles (third DIP
switch in figure) and T1 Differential poles (fourth DIP switch
in figure) for units with S/N 2675 or higher (PCBs with S/N
6987 and higher)
To reset the temperature loop parameters to the approximate settings for a Photodigm TOSA DBR
Laser:
The T1 loop is not used as the TOSA only has one TEC.1.
Set the T2 dip switches to the configuration shown in table 5.2.
Measure the resistance across GND5 and probe point GAIN2. Set this resistance to between3.
1.01 kΩ and 1.03 kΩ by adjusting trimpot PROPGAIN2.
T2
Prop.
On
0.047
s
0.1 s 0.22 s
0.47
s
1.0 s 2.2 s
4.7
s
On x
Off x x x x x x x
T2
Diff.
On
0.01 s
0.022
s
0.047
s
0.1 s
0.22
s
0.47
s
1.0
s
On x x
Off x x x x x x
Tab. 5: Factory settings of T2 Proportional poles (first DIP
switch in figure) and T2 Differential poles (second DIP switch
in figure) for units with S/N 2675 or higher (PCBs with S/N
6987 and higher) when using a Photodigm TOSA DBR Laser
Laser Controller Serial Numbers 2674 and below; Temperature Control Board Serial
Numbers below 6987
To reset the temperature loop parameters to the factory settings:
Set the dip switches to the configuration shown in table 6 and table 7 and figure 5.1.
Measure the resistance at probe points GAIN1 and GAIN2. Set GAIN1 and GAIN2 between 715 Ω2.
and 785 Ω by adjusting trimpot PROPGAIN1 and PROPGAIN2, respectively.
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