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OP940-SW
Adjust the gain setting using the button until the trace neither saturates the meter
nor results in a flat line where a problem is suspected.
If the scan is saturating while in High mode, switch back to Low mode for a more
accurate scan. Conversely, if no reflection is seen in Low mode, try switching it over to
High mode to see if that causes a peak to appear.
Scan Mode
Example 5 (cont.): Performing OTDR-style trace in Scan Mode
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