Return Loss Measurement Setup; Setup For Return Loss Measurements - Agilent Technologies HP E5574A User Manual

Figure 3-6
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Taking Standard Loss Measurements
Measuring the Return Loss

Return Loss Measurement Setup

Signal Processing and Display
Head Input A Head Input A Head Input B Head Input B

Setup for Return Loss Measurements

1 Connect the optical output to the input of the DUT.
2 If the DUT has no fiber output, attach a patchcord to its output.
3 Wind the fiber or patchcord close to its open end in seven tight
loops around a pen.
This will virtually eliminate the backreflection from the open
end.
62
Coupler
Internal
Source(s)
Pol. Ctrl.
3 dB
Optical Input Optical Input Optical Output Optical Output
Device
under
Test