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OA 5000 Series User Manual 2 --- 3
Enabling/Disabling Attenuation
On the OA 5000, the DISABLE button (Figure 2-2) allows you to enable or
disable the optical path through the attenuator with a shutter. You can still
set the attenuation level, however, since it is not dependent on the optical
signal passing through the attenuator. For example, you can block the
passage of the optical signal through the attenuator by disabling attenua-
tion, setting the attenuation level, then enabling attenuation and your signal
will be attenuated to the desired level immediately.
DISABLE
MIN ATT
STORE 1 RECALL 1
STORE 2 RECALL 2
This button enables or
disables attenuation.
Figure 2-2: The Location of the DISABLE Button
To enable attenuation, press the DISABLE button on the front panel so that
the button is not lit. When the DISABLE button is not lit, the optical signal
passes through the attenuator.
To disable attenuation, press the DISABLE button so that it is lighted. When
the DISABLE button is lighted, the internal shutter is placed across the
optical path, providing ≥100 dB attenuation for the OA 5002, OA 5012, and
OA 5022, and ≥90 dB attenuation for the OA 5032.
WARNING
To prevent damage to your eyes, avoid looking into the optical
output port while there is an optical signal connected to the input
port. The disable function is only valid while the instrument is
switched on. When the OA 5000 is switched off, the shutter with-
draws from the optical path and the light is attenuated only by the
previous attenuator setting.