Conceptual relationships among TP2, TP3 and budget

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Conceptual relationships among TP2, TP3 and budget

• Tom Lindsay

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Terms

• Part A correlated penalties and stresses
• Part B uncorrelated penalties and stresses

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part A relationships

• TP3 will include ref Tx and emulate channel ISI
• This setup will have a PIE penalty metric
• Proposed TP2 test will include the DUT Tx and
  channel ISI
• Penalty test limit should not be greater than TP3
  penalty
• The penalty value must relate directly to budget
• Note propose using PIE-D or equivalent
  throughout (I agree with Lew)

4
part A details

• Propose using TP3-accepted ISI generators as TP2
  test channels (in SW)
• Presumes TP3 generators capture/represent LRM
  fibers
• Propose using BT4 filter (realizable) EML
  source for TP3 ref Tx
• Combined effects with PG probably Gaussian
  correctable
• 4.5 dB (TBD), PIE-D
• Key budget value
• 95 w/c offsets with ??? Cambridge set
• 60-70 psec Gaussian pulse, 20-80
• FYI - close to present mask
• Should offers reasonable flexibility between
  correctable and uncorrectable impairments at TP2
  without significant impact to budget

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Penalty curves concept(originals from
lindsay_01_0704)
This needs to be redone, but colored lines are
based on completely linear impairments which will
correct well. Real lasers with non-linearities
will not correct so well, so some room is
required. Red is excessive, but green may be
reasonable.
Laser w/ nonlinearities?
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Estimated ref Tx (via 7.5 GHz filter)part A
10/7/04
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part B relationships

• TP3 will add amplitude noise and jitter to
  emulate RIN, other Tx noise(?), and modal noise
• This setup will have a OMA/noise ratio and jitter
• Proposed TP2 test will impose limits on amplitude
  noise and jitter
• RIN and other Tx noise portion limit must
  relate/translate to and be within RIN and other
  Tx noise portion of TP3 OMA/noise
• Same concept for jitter
• The OMA/noise value must relate to budget
• (other) Jitter does not relate directly to
  budget, but TP2 and TP3 should relate closely

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part B details

• Limit TP2 rms noise to
• TBC
• Same as RIN value used in TP3 test
• Limit TP2 rms jitter to
• TBD
• Relate to 0.1 UI SJ used in TP3 test allow for
  noise to jitter translation via edge rate

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Budget, vertical stresses and limits