
Setting Attenuation Levels
User Reference
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Step 2: Use the two knobs to adjust the displayed wavelength value.
The COARSE knob changes the displayed value by 10 nm per click and
the FINE knob changes the displayed valueby 1 nm per click. The
wavelength can be adjusted from 600 to 1700 nm.
Step 3: When the desired wavelength is displayed,press WAV E-
LENGTH again to accept the new displayed value. The OA 5000 will
return to the previous attenuationdisplay mode.
Toset the attenuation level once you have set the wavelength:
Step 1: Set the attenuation display mode by pressing the MODE but-
ton.
The attenuation displayshows the current attenuation value in one of two
modes, absolute or relativeto a reference value. Pressing the MODE button,
while it is illuminated, toggles betwe en these modes.
When the ATT light is on and the -- R EF light is off, the displayed attenuation
is in absolutemode. In this mode, the displayed attenuation is the value
relative to itsabsolute minimum setting. The minimum value in this mode is
always 0 dB.
When both the ATT and --R EF lights are on, the displayed attenuation value
is the absolute attenuationvalue minus the value of the reference (refer to
the section Setting the ReferenceValue to set the reference). The COARSE
and FINE knobs still adjust the attenuationvalue as with absolute mode.
The only differenceis the value displayed in the attenuation display.
Step 2: Set the desired attenuation valueby adjusting the COA RSE
and FINE knobs. The COARSE knob changes the attenuation by 1 dB
per click and the FINE knob changes the attenuation by0. 01 dB per
click.
NOTE
Switching between the absol ute and relative display m odes does
not change the actual attenuation value but only the value dis-
played.
Setting theAttenuation Level