Santec OTF-930 - Wavelength Tuning; Setting; Filter Bypass Control

7-6
OTF-930 Operation Manual
7.4. Wavelength Tuning / Setting
1. Check that the indicator light adjacent to the Wavelength / Power Selection Key is lit
and indicating wavelength. If the indicator light is not indicating wavelength press the
Wavelength / Power Selection Key to toggle from the Power setting.
2. Enter the required wavelength value using either the Numerical Keypad or the Up /
Down Arrow keys. When using the numerical keypad the rst number entered must be
a one (1). This is the 1000’s unit for the wavelength in nanometers (nm). The value
entered must be within the tuning range of the device and has three decimal places. If
a wavelength outside the specied range is entered the OTF-930 will be set at either the
minimum or maximum achievable value. To cancel the input press the Wavelength /
Power Selector Key and the display will return to its currently set value.
3. Press the enter (ENT) key to save the displayed value to memory and initiate a change in
the wavelength setting.
7.5. Filter Bypass Control
The OTF-930 contains a function which enables the lter to be removed from the optical signal
path. This function is operated using the Disable key. When operated the optical signal travels
directly from the optical input to the optical output.
1. Press the Disable Key to activate the Filter Bypass. The LED indicator immediately
above the Disable Key will blink as the filter moves out of the beam and light
continuously when the lter has been removed from the optical path.
2. When the Filter Bypass Control is active and the LED is lit it is not possible to set the
wavelength, operate the peak search function or set parameters for the GPIB interface.
3. Pressing the Disable Key a second time will cancel the Filter Bypass function and return
the instrument to normal operation. The LED indicator above the Disable Key will blink
as the lter moves into the beam and will go out when the instrument has returned to
normal operation.