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Definition of Terms
Optical
0.1 dB
High Level
Optical
Low Level
+ 5 V
0 V
Risetime
N O TE
Agilent 8159xB Optical Switch Modules, Fourth Edition
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Return loss
Minimum ratio between incident power and reflected power over all
switch states, expressed in dB. The return loss RL for any input port is
calculated from:
Where Pinc is the incident power, P,ref is the reflected power and MINs{}
is the minimum over all switch states.
Conditions: Termination patchcords with high quality connectors
connected to the output ports. All optical connectors in perfect optical
condition.
Switching Time
Maximum time needed to stabilize the optical output power when
switching. This is applicable for all input-output combinations and for
risetime and falltime, as described in the figure below.
Optical
High Level
Optical
Low Level
+ 5 V
0 V
Figure 12 Switching Time
Switching time excludes the time needed for the interpretation of the
command and for the internal communication between the mainframe and
the optical switch module.
Specifications
55 dB
Falltime
19
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