EXFO OTDR 2 - Manual (Page 81)

Customizing Your OTDR
OTDR 73
Customizing the Acquisition Time Values
Customizing the Acquisition Time Values
You can customize the values associated with the Duration (s) dial. The
acquisition time values represent the time during which the OTDR will
average acquisitions.
You can customize the acquisition time to improve the signal-to-noise ratio
(SNR) of the trace and enhance the detection of low-level events. The SNR
improves by a factor of two (or 3 dB) each time the acquisition time is
increased by a factor of four.
To customize the acquisition time values:
1. From the main window, select the OTDR tab then tap the
button.
2. Under Custom Parameters, from the Duration (s) list, select the value
you want to modify.