Triplett TDR User Manual

Page 10

Page 9

8. Testing cables not included in library

If the cable type to be tested is not in the library, then it can still be tested if
the Vp is known. If the Vp is unknown refer to Section 9.

Using the Key scroll to the bottom of the library and beyond, until you
find the the Vp settings from 99% downwards.

9. How to determine unknown Vp settings

If the TDR is to be used with a cable type for which the Vp is unknown, this
first must be determined.

1. Take a sample of the cable at least 60 feet in length

2. Measure its length by direct measurement

3. Connect to the TDR and adjust the Vp setting to give a reading of the
correct length .

This Vp setting can now be noted and used on unknown lengths of the
same cable type.