THORLABS DC4104, Руководство по эксплуатации

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DC4104
The current corresponding to 100% brightness is defined by the 'User Limit Current'. Select
'User Limit' from the main menu to change this value.
The faster the multicontrol knob is turned, the greater is the adjustment ratio of the brightness.
If you move the knob slowly you can set the current with a 0.1% resolution. If you move it
faster the resolution will increase up to a 20% resolution.
3.1.3 External Control Mode
This mode allows to control the DC4104 by an external signal. The appropriate LED channel
must be enabled in the External Control Mode menu.
The 'External Control Mode' has no parameter settings. The LEDs can only be controlled via
the Push-Pull connector at the rear panel of the DC4104. The applied voltage corresponds to
the LED current. 1V is equivalent to a LED current of 100mA. A maximum voltage of 10V can
be applied, which results in a current of 1000mA.
Please note: The maximum current is limited by the user defined current limit set in the 'User
Limit' menu.
The modulation frequency range is 0 to 100kHz and valid for sine wave modulation. There are
4 separate inputs which will affect the corresponding channels. To enable or disable one or
more LEDs select the corresponding LED by turning the multicontrol knob and press the 'LED'
button. Depending on the selected output mode only one LED or all 4 LEDs can be enabled.
The output mode can be changed within the '
Settings ' menu.
The 'Single Selection Mode' allows to enable only one LED at a time. It is indicated by a circle.
If an LED is enabled there is a dot within this circle.
The 'Multi Selection Mode' offers the possibility to enable up to four LEDs. It is represented by
square boxes and a check mark indicates an enabled LED.
NOTE
If more than one LED at a time has to be illuminated switch to the 'Multi Selection Mode' and
enable this LED. If the LED is not enabled it will not illuminate even if a modulation signal is ap-
plied to the modulation input.
A cable for the modulation signals is provided. The following table shows the correlation of the
single wires:
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