Setting Attenuation and/or Power Levels How to Use a Variable Optical Attenuator module
202 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
How to Control the Shutter
The optical path of the Attenuator module is controlled by a shutter, which you
can use both for protection purposes or to simulate channel drops.
When the shutter is open, the green LED on the attenuator module’s front panel is
lit.
The Enable button
Press the Enable button, located on the front panel of the Attenuator module, to
toggle the shutter state.
The On/Off Softkey
Press the [On/Off] softkey to toggle the shutter state.
The menu item <Output State>, and the parameter [Output], is functionally
equivalent to the [On/Off] softkey.
Output at Startup
To select the shutter state at startup:
1 Press the [Menu] softkey.
2 Use the Cursor key to highlight <Output at Startup>, then press Enter.
3 Select <Off > or <On>.
4 Press [OK], then press [Close].
Remote Interlock
The Attenuator module’s shutter state is protected by mainframe’s Remote
Interlock (RIL) feature. The shutter cannot be opened if the 50Ω resistor is
removed from the RIL connector on the back panel of the mainframe. See “The
Remote Interlock (RIL) connector” on page 311.
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