User`s guide

Specifications Definition of Terms
32 Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
NOTE For a displayed attenuation of 0 dB the actual attenuation is 0 dB per
definition.
Attenuation Setting (where applicable)
When changing the displayed attenuation, this module behaves like a
pure attenuator.
NOTE Alternatively, the attenuator can be operated in power setting.
Attenuation Range
Range of displayed attenuation for which the specifications apply.
Correction (of Attenuation)
The filter has a power-dependent attenuation, because of warm-
effects. The displayed attenuation is valid up to a specified power P0.
For higher power levels, the nominal attenuation should be calculated
with the given formula. In this case the specified accuracy is
applicable within the entire specified power range.
attenuation
setting [dB]
total loss [dB]
total loss
attenuation
insertion
loss
0
0
Input Power [mW]
∆Att = Att
nom inal
- Att
displayed
[dB]
S
l
o
p
e
d
u
e
t
o
f
i
l
t
e
r
d
r
i
f
t
0
0
P
0
Standard
Attenuation
Po wer dependen t
Attenuat ion