EXFO VDSL2 - Manual (Page 115)

Fault Location
Copper, VDSL2, ADSL2+ and IP Triple-Play Test Set 107
TDR Test
To make TDR adjustments via the keypad:
1. Press
to change the mode and function of the up/down
arrow keys.
2. Press repeatedly to cycle between:
³
Zoom
³
Gain
³
Pulse Gain (Pulse Width & Gain)
³
Range
³
Cursor and Marker Selection
To measure the distance/duration between reflections:
1. Press
to cycle the mode and change to CursorMarker.
2. Press the left/right arrow keys to position the blue cursor (indicated by
the blue color of data above cursor).
3. Press the up arrow key to select the red marker.
4. Press the left/right arrow keys to position the marker.
5. The difference between the cursor and marker is continuously
updated and is indicated with a triangle (delta symbol) above
the graph.
To zoom in/out:
1. Press
to select the Zoom function. Default mode is Zoom.
2. Press the up/down arrow keys to increase/decrease Zoom function.
The graphical display zooms in or out accordingly.