Greenlee NC-500 NETcat Manual De Instrucciones página 9

NC-500 NETcat Pro
®
Operation (cont'd)
Calibration – NVP
In the NVP (Nominal Velocity of Propagation) calibration mode the value can be adjusted
using the adjustment bar.
Because cables have different capacitance and impedance, to get an accurate length mea-
surement, the NVP will need to be calibrated using a length of cable of the same type that
is intended for testing. Please be aware that the multi-pair test and coax test have separate
NVP values.
Retest Button
Cable NVP Lookup List: The Cable NVP library is accessed in the NVP setup screen as
shown. There are five fixed cables with typical values already stored in memory for UTP/STP
and COAX cables, respectively. The user can add to this library by pressing the + button. The
memory can hold a maximum of five user definable cables. This data is retained even when
the battery is removed.
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