Test-Um Comprehensive ZDT Testing Equipment for Ethernet Link Validation

Test-Um NT955 Series ValidatorTM Network Tests

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

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2005 Aug 25 Test-Um Inc.

10:53:01 VALIDATOR

Ethernet Capabilities

E-NET

AUTO

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

Figure 6.5 Ethernet Link Detected

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