JDSU NT850 Guia do Utilizador descarregar pdf (Página 78)

Chapter 5 Viewing Properties and Modifying Settings

Modifying Unit Settings

62 LanScaperPRO Network Tester User’s Guide

3 Press the SEL key.

The Calibrate Length screen appears.

Figure 30 Calibrate Length screen

4 Remove all cables from the tester, as directed by the

screen.

5 Press the TEST key or press any other key to exit.

If the TEST key is pressed, the tester runs the cali-

bration routine, stores the value, and returns the user

to the Setup menu.

Finding a

length constant

The Find Length Constant screen allows for the measure-

ment of the length constant of an attached known length

of cable. It is recommended that at least 50 feet of cable

be used to minimize the resolution error. (1 foot in 50 = 2%

uncertainty).

NOTE

The effect of a patch cable on the measured length of a

cable run can be eliminated by leaving the patch cable

attached to the tester while calibrating cable length.

LanScaperPRO_User_Guide.book Page 62 Friday, January 25, 2008 1:14 PM

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JDSU NT850 Guia do Utilizador Página 78