VeEX MX100 Series, Электронное руководство

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Data Tab:
User selects a test pattern that will be encapsulated in the Ethernet frame payload (for framed mode).
Depending on the test layer, different test pattern options are available;
Layer 1 test patterns
CRPAT - Compliant Random Pattern provides broad spectral content and minimal peaking for the
measurement of jitter at component or system level.
CJTPAT - Compliant Jitter Test Pattern is a Jitter Tolerance Pattern that stresses a receiver by exposing it to
extreme phase jumps thereby stressing the clock data recovery (CDR) circuitry. The pattern alternates
between repeating low transition density patterns and repeating high transition density patterns.
BERT Setup - Test pattern (Layer 1 Unframed
)
BERT Setup - Test pattern (Layer 1 Framed
)
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Layer 2 & 3 test patterns
PRBS:
2^31 -1 (147 483 647-bit pattern used for special measurement tasks, e.g. delay measurements at higher bit
rates)
MX100/120 e-Manual D07-00-004 Rev A04 Page 30 of 115