Anritsu MT9812B, Operation Manual, Page: 62 / 144

Section 4 Operation
4-10
4.2.5 Setting ATT
The light source incorporates an attenuator function, which can be set in the range
between 0.00 dB and 6.00 dB. The resolution is set at 0.01 dB.
Operations Remarks
Press the Prmtr key. Continue pressing the key until the unit display
turns to “dB” .
Press the or key. Select the input digit.
Press the or key. Set the value.
Press the Enter key. The pressing this key establishes the setting.
A numerical character constituting one of the digits of the attenuator value shown
on the message display flickers to signify that it is currently being set. The nu-
merical character constituting the flickering digit can be changed by pressing the
or key. Moreover, the flickering digit (the digit allowed to be input) can be
changed by pressing the or key.
POINT
The magnitude of attenuation set by the ATT setting
function is merely a guideline and therefore does not
guarantee absolute accuracy. Moreover, as this func-
tion adjusts the magnitude of attenuation by varying
the electric current that drives the LD element, this may
cause deviation in the output optical frequency (wave-
length). If an absolute magnitude of attenuation is re-
quired, use the optical attenuator separately.
The ATT setting has already been modified without
pressing the Enter key. However, as the message dis-
play remains flickering, it is recommended to press the
Enter key to establish the setting and terminate the set-
ting mode.