OptoTest OP940-SW Instruction Manual page 34

OP940-SW
Example 1: Referencing and Measuring Return Loss
To take the reference for a return loss measurement, connect the reference cable from
the source directly to the detector port of the instrument.
Input
Select the desired mode screen, such as ILRL, and then select the RL Ref option.
On the proceeding screen, select the Start RL Ref option. The instrument will begin
scanning for the first large reflection and will store that reference position. This process
might take a few seconds.
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