User`s guide

Performance Tests Performance Test Instructions
48 Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
8 The value read should now be 14.7 dB, the same as the value
entered for reflection reference R.
9 Terminate the reference cable by wrapping the fiber several times
around a pencil or the shaft of a screwdriver, and then select the
[TERM CAL] softkey.
10 Remove the reference cable and connect the equipment as shown in
Figure 13.
Figure 13 Return Loss Test Setup
11 Terminate the patchcord on the attenuator output by wrapping the
fiber several times around a pencil or the shaft of a screwdriver. Do
the same for the monitor output if applicable.
12 Set the attenuation [α] to 0 dB and note the input return loss in the
Test Record.
13 Open the shutter and record the return loss in the Test Record.
14 Connect the return loss meter to the attenuator output port and
terminate the input port as described in step 12.
15 You may measure the output return loss for open and closed shutter
or for other arbitrary attenuation settings as described in steps 13
and 14.
8163A
8163A