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Chapter 3, Getting Started with Xgig TraceControl Xgig Tuning and Equalization
70 Xgig Analyzer User’s Guide
Tuning, you should attempt Equalization at the higher and lower settings from the current
setting. Re-tune whenever you change Equalization settings.
Low De-Emphasis < 3dB Short cable = 0.5m to less than 2.0m
Medium De-Emphasis = 3dB Long cable = 2.0m to 3.0m
High De-Emphasis > 3dB
Table 4: Recommended Equalization Settings
Case / Equalization Settings None Low Medium High Notes
1.5000 Gbps Operation

Frequency components not high enough to
need equalization in normal use.
3.0000 Gbps Operation

Frequency components not high enough to
need equalization in normal use.
6.0000 Gbps Operation, Short
Cables,
No De-Emphasis

Frequency components close to the source
may need medium equalization as the
channel will attenuate high frequencies.
6.0000 Gbps Operation, Long
Cables,
No De-Emphasis

Frequency components far from the source
may need high equalization as the channel will
significantly attenuate high frequencies.
6.0000 Gbps Operation, Short
Cables,
Low De-Emphasis

Frequency components close to the source
may need low equalization as low
de-emphasis and cable may cause the
channel to mildly attenuate high frequencies.
6.0000 Gbps Operation, Long
Cables,
Low De-Emphasis

Frequency components far from the source
may need medium equalization as the low
de-emphasis and long cable may cause the
channel to moderately attenuate high
frequencies.
6.0000 Gbps Operation, Short
Cables, High De-Emphasis

Frequency components close to the source
may not need equalization as high
de-emphasis and short cable may normalize
the signal.
6.0000 Gbps Operation, Long
Cables,
High De-Emphasis

Frequency components far from the source
may need low equalization as high
de-emphasis and long cable may cause the
channel to mildly attenuate high frequencies.