BT603 Users Manual
8.6.
Assigning Mode to Arrow Buttons and Selecting Pulse
By using the cursor buttons, the user can control the waveform display screen such as zooming –in or –out, scrolling and moving cursor1
or cursor2. Pressing the
button allows the user to assign each operation to the cursor buttons.
Figure 18 Selecting Mode for Arrow Buttons
Select an item using the
or
buttons, then press the
button to select. The cursor buttons will now operate in future tests as
assigned in the waveform display. For example, if the user selects “PULSE WIDTH,” then the width of the measuring pulse can be
increased or decreased using the .
8.7.
Measurement
Accuracy
and
VOP
If the VOP is set accurately, the tester performs at an accuracy of ±4 % for coaxial, UTP and STP cables. For example, ±10 % for cables
under 5 meters in length. However, general metallic cables with uneven capacity and inductance can show less accuracy than other well-
made communication cables, since the VOP may not be constant along the cable.
Even if the theoretical VOP of cables is calculated through permittivity at the time of production, the actual VOP of cables can be a little
different from theoretical one. The actual value is a little higher than the expected value since the space between the metallic wires cannot
be cleaned completely.
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