TTI FTE-7000A User Manual page 24

Chapter 7 OTDR Operation
7.8 Construction Mode
Construction Mode is useful when a large number of fi bers need to be tested with the same settings at multiple
wavelengths. This operation mode test a fi ber at two wavelengths, saves the traces and displays them in dual
trace mode.
Open or Create a Project Folder
Open project management and highlight the project folder with the proper parameters for the test and where
the fi les should be stored. If a new project needs to be established do so using the information from Chapter 8
of this guide.
Set Base File Name
Once the fi le management folder has been opened the fi les folder for that project will be displayed. A base
fi le name for the test should be established. Press the menu button to open the fi le management menu, with
the fi le tab highlighted, press the select button or the down button to open the drop-down menu. With save
highlighted press select. Use the QWERTY to enter a base fi le name.
When testing in construction mode, fi les will be save in numeric order. For example, if the base fi le name of
romecity were entered, the fi rst test in construction mode (If the test were at 1310/1550nm) would be a test
at 1310nm with a name of romecity1 and the second test would be the same fi ber at 1550nm with a name of
romecity2. The next test would be romecity3 and romecity4.
Once the base fi le name is set, exit the fi le manager by pressing the menu button, pressing select on the fi le
tab, using the down button to highlight exit and pressing select.
Set the Wavelengths
On the main trace screen in the OTDR tab the wavelength settings are accessible. There are wavelength
settings available here that are not in the parameters setting screen. Dual wavelength units will have one extra
setting of a combination of the two wavelengths. For example, if the OTDR is a 1310/1550nm dual wavelength
unit, there will be three available selection here. 1310, 1550, and 13/15. The 13/15 is used for constructions
mode. This needs to be selected anytime construction mode is to be used. Quad wavelength units will have
850, 1300, 1310, 1550, 85/13 and 13/15, where either 85/13 or 13/15 may be use for construction mode testing.
Use the touch screen to cycle through these wavelength settings.
FTE-7000A User's Guide Rev A 5/2014 19