Similar The Product Survey Table overviews a selection of mini OTDRs. In automatic operation, mini OTDRs display this trace together with measurement data that includes a table of each event and its characteristics. This feature allows you to process and archive data back at base without being restricted to using the same OTDR model. Eventually, either the end of the fibre or the OTDR's inherent noise level prevents further reflections. The document includes benchmark test procedures that you can use to determine if an OTDR meets a vendor's claims.
Data storage is one area where products show some divergence.
Alternatives range from built-in flash cards to Gbyte hard disks, although the general approach is to treat the OTDR as a data collection unit and analyse data back at base. In any case, you need to check how many complete fibre traces one unit can store, remembering that some need to use storage for reference traces taken at installation, for example. Or, you can combine traces on the same fibre taken at different wavelengths. You can also use the software to create templates or reference traces for taking on-site. Vendors' mini OTDR technical specs range from a few lines to several pages.