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Performance Tests
56
Connect the equipment as shown in
3
Figure 11
Return Loss Reference Setup for SM attenuators
Set the attenuator and the power meter to the actual wavelength of the
4
internal laser source of the return loss meter.
Disable the internal laser source, cover the end of the reference cable
5
and zero the return loss meter.
Uncover the clean end of the reference cable and enable the laser
6
source.
Select the REF CAL parameter and set the reflection reference R to 14.7
7
dB, the default value for the return loss of the reference reflector cable
81610CC.
Set Display to Reference. The value read should now be 14.7 dB, the
8
same as the value entered for reflection reference R.
Select the REF AUX parameter and terminate the reference cable by
9
wrapping the fiber several times around a rod with a diameter around 5
mm (such as a screwdriver shaft, or a pencil).
Set Display to reference to set the termination parameter.
10
Remove the reference cable and reconnect the equipment as shown in
11
Figure
12.
Figure 12
Return Loss Test Setup for SM attenuators
Terminate the patchcord on the attenuator output by wrapping the fiber
12
several times around a rod with a diameter around 5 mm (such as a
screwdriver shaft, or a pencil). Do the same for the monitor output if
applicable.
Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition
Performance Test Procedure
Figure
11.
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