AEA Technology 20TDR, Основное руководство

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actual VF. Press to accept and return to the
Measurement Screen and use the modified VF.
SAMPLE A CABLE - This feature permits measuring a cable’s velocity factor. It
requires knowing the cable’s length in feet and inches or
meters to make that entry valid and obtain an accurate
velocity factor. A cable’s point-to-point measurement on
a cable plat will suffice as long as there are no undocumented
maintenance loops in the cable.
Use ► to select this feature and follow the on-screen
instructions to connect the cable, leave the opposite end
open and mark the end with the cursor. Pressing
will calculate and display the velocity factor to accept or
decline for use.
DISTANCE UNITS – Use the ◄► keys to switch between FEET & METERS.
SELECTED CABLE – Displays the selected cable for final review prior to
Pressing to exit to the Measurement Screen. The
TDR will re-calibrate to the new cable type’s impedance (Z) and Velocity
Factor (VF) prior to measuring.