TDR Controls
The controls described below are valid for all modes except the Memory mode. The 965DSP displays the controls and other parameters at the bottom of the screen.
Use the [Tab] and [Enter] key to move forward or backward through the TDR controls.
Use the [Up] and [Down] key to change the parameters for the control selected.
Individual controls and their parameters are described as follows:
Length:
100 ft, 200 ft, 500 ft, 1 kft, 2 kft, 5 kft, 10 kft, 20kft, 30 kft
(30m, 60m, 150m, 300m, 600m, 1.5 km, 3 km, 6 km, 10 km)
Length allows you to set the distance (or span) from the left side of the screen to the right side. The left side of the screen is usually at the test set, and the right side is the furthest distance that can be displayed with the length selected.
Filter: is Out, is In
Filter allows you to switch in a filter to remove noise. You should use the filter if you see noise on the display. Note:
Switching in the filter may make it difficult to detect small events on the cable.
Pulse Width: | 5 ns, 34 ns, 235 ns, 1600 ns |
Pulse Width allows you to select the width of the pulse sent out on the pair. The 965DSP automatically chooses the best pulse width for each length selected. Note that you can change the pulse width independent of length.
Use a shorter pulse width to give better resolution of events.
A shorter pulse width will not go as far on the pair.
Use a wider pulse width to see further on the pair. Note that the resolution of a wider pulse will not be as good as a shorter pulse.
Pulse Width is also displayed at the top right of the display.
99
