Operating Instructions
Find an unknown Vp
This method is used to find the Vp for cables under test where the Vp is entirely unknown. It
requires a sample cable that is of the same type that can be measured physically.
1) Measure the length of the test cable. Make sure the test cable is of the same type for
which you need to find Vp. If there are any adapters used while connecting the cable,
include their length in the measurement, or set one of the cursors at the end of the adapter
before attaching the cable.
2) Attach the test cable to the CT100.
3) Press the
AUTOFIT
button. The CT100 will now show the beginning and the end of the
test cable (Figure 4).
4) Position the active cursor at the end of the test cable. Use the
HORIZONTAL SCALE
knob
to zoom in on the end of the cable and get an accurate placement (Figure 5).
Mohr CT100 / CT100HF Operator's Manual
33
Figure 4: Screenshot showing AUTOFIT result. The cable end, in
this case an open termination, has been found at 3.002 feet and
the cable has been fit to screen.
