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Test 4. Optical Input Return Loss
Test 4. Optical Input Return Loss
Description
Procedure
10 The return loss module measures the termination
11 Connect the HMS-10/HP/HRL to FC/PC patchcord to the
12 The lightwave multimeter measures the return loss.
Input return loss is verified using the following devices:
• Agilent 8153A lightwave multimeter
• Agilent 81553SM 1550 nm Fabry-Perot laser, SM 9/
125 µm source module
• Agilent 81534A return loss module
Standard instruments (flat contacting connec-
tors)
1 Turn off the output of the source module.
2 Connect a single-mode patchcord between the optical
output of the source module and the INPUT SOURCE
connector of the return loss module.
3 Set the wavelength on the return loss module to
1550 nm, and select an average time of 1 second.
4 Locate an HMS-10/HP/HRL to FC/PC patchcord.
Connect the HMS-10/HP/HRL end of the patchcord to
the OUTPUT connector of the return loss module.
Terminate the other end of the cable.
5 Zero the return loss module.
6 Turn on the source module.
7 Remove the termination from the cable. Leave the free
end of the cable uncovered.
8 The return loss module measures the reflection
reference (14.6 dB return loss of the FC/PC connector of
the patchcord in air).
9 Make a low-reflection termination in the HMS-10/HP/
HRL to FC/PC patchcord. Do this by wrapping the cable
around a 5 mm diameter mandrel six times.
parameter.
front-panel OPTICAL INPUT connector of the
Agilent 86121A.
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