Tdr Settings - Vop; Cable - Arcom Digital Quiver XT User Manual

TDR Settings – VOP
The velocity of propagation number should
correspond to the type of cable being testing
according to manufacturers' specification. It is
used for both the NTC TDR and the CPD radar. A typical value is .87 %. Quiver uses
calculated time distance from the time the pulse is sent to the time it is received – so
this velocity of propagation number is important in order to accurately calculate
distance to the fault. If the velocity of propagation number is changed, the indicated
distance to the impairment will correspondingly change. After selecting the VOP menu
item, use the keyboard and enter the two digits corresponding to the VOP then press
enter – the device will add the decimal and percentage symbols.

Cable

For the NTC TDR, the type of cable being used in the network needs to be selected
from the drop down list using the up and down arrow. The type of cable indicator
contains information related to the insertion loss characteristics of the cable, and is
used in our normalization process such that return loss remains relatively flat and
accurate across the band.
more accurate and does not affect the distance to the fault measurement.
This information is used to make the return loss indication
33