Test-Um VALIDATOR-NT NT955 User Manual

77

Test-Um NT955 Series
If no telephone or

 voltage sources 

are found, Validator-NT attempts an 

Ethernet link.  If a link is found, information about the link is displayed:

-  Identifies the Ethernet connection

-  Speed linked at (10, 100 or 1000 Megabit) 

-  Type of link (MDI, MDI-X or Auto MDI/MDI-X) 

-  Advertised Speed of the device

-  SNR 

-  Skew if 1000 Mbit

-  Frequency Offset – the difference in the data rate, in parts per 

million (ppm), between the Validator-NT and the installed far end 

equipment.  The value should not normally exceed 100 ppm.   

Data errors are likely to occur at 200 ppm.  

Port Discovery

Ethernet

   Capabilities

Link established at: 1 Gbs

Remote device MDI/MDI-X: Auto

Remote device advertises:   1 Gbs FDX

Remote device advertises: 100 Mbs HDX/FDX

Remote device advertises:   10 Mbs HDX/FDX

Pair [A]:     skew: 0.0 ns       SNR: 30.0 dB

Pair [B]:     skew: 8.0 ns       SNR: 29.9 dB

Pair [C]:     skew: 0.0 ns       SNR: 30.0 dB

Pair [D]:     skew: 8.0 ns       SNR: 30.0 dB

Frequency Offset: 30 ppm

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2005 Aug 25

  10:53:01

Figure 6.5 Ethernet Link Detected

Validator

TM

 Network Tests