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Performance Test Procedure
WARNING
Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition
Set the attenuation [a] to 0 dB and note the input return loss in the Test
13
record.
Open the shutter and record the return loss in the Test Record.
14
Connect the return loss meter to the attenuator output port and
15
terminate the input port as described in step 12
You may measure the output return loss for open and closed shutter or
16
for other arbitrary attenuation settings as described in step 13 and
step 14 .
Polarization Dependent Loss (PDL) Test -
Scanning Method
(Not applicable to 81578A)
Carry out the following PDL Test at 1550 nm with single mode fibers using
the equipment listed in
angled contact versions of the switch use patchcords with appropriate
connectors and suitable connector interfaces.
This test is recommended for the fiber loop-type 11869A Polarization
Controller. For plate-type Polarization Controller 8169A refer to section
"Polarization Dependent Loss (PDL) Test - Mueller Method (Not applicable to
81578A)" on page 58.
Turn the instruments on and allow the devices to warm up (20..30 min).
1
Make sure that all your connectors are clean and undamaged.
2
Connect the equipment as shown in
3
Figure 13
PDL Test Setup - Scanning Method for SM attenuators
Table 4
on page 48. To adapt for the straight or
Figure 13
Performance Tests
57
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