AFBR-810BZ datasheet(7/48 Pages) AVAGO

7 / 48 page

Informative TX parameters trading off each other while

guaranteeing TP2 & TP4 performance

Parameter

Symbol

Extinction Ratio

Output Optical Modulation Amplitude

OMA

Output Rise/Fall Time

Relative Intensity Noise OMA

RIN12 OMA

Contributed Portion of Accumulated

Deterministic Jitter

Contributed Portion of Accumulated

Total Jitter

Informative RX parameters trading off each other while

guaranteeing TP4 performance

Parameter

Symbol

Receiver Bandwidth (BW)

Input Optical Power Sensitivity (OMA)

Contributed Portion of Accumulated

Deterministic Jitter

Contributed Portion of Accumulated

Total Jitter

The reference model for testing transmitters consists

of a pattern generator, fiber optic test cable, attenuator,

test receiver and BERT. See Figure 7 for the evolution of

a reference channel to a transmitter test channel. Dif-

ferences between the worst case values for attributes in

the reference model and those in the test equipment set

can be compensated by an added attenuator (note that

the 10GbE model translates all impairments into power

penalties) and adjustments in TJ criteria at TP4. Differences

in the TP1 input jitter between the defined conditions, TJ

r and DJ r, for the reference channel and actually provided

in the test channel, TJ t and DJ t, can also be accommodat-

ed by adjustments to TP4 test criteria (TJ r becomes TJ t).

The extended 10GbE Link model is used to determine the

compensating attenuation and TP4 criteria adjustments.

The reference for testing receivers consists of a pattern

generator, test transmitter, fiber optic test cable, attenua-

tor and BERT. See Figure 8 for the evolution of a reference

channel to a receiver test channel. In a similar manner

as with the transmitter, all differences between the test

equipment and worst case channel are compensated with

an attenuator and adjustments in the TP4 criteria.

Reference Channel

Pattern

Generator

BERT

TP1

TJ r

DJ r

Worst Case Transmitter

Min OMA

Min Center Wavelength

Max Spectral RMS Width

Max RIN12 OMA

Max Rise & Fall Times

Worst Case Cable Plant

Fiber Type

Max Length

Max Connector Loss

Max Modal Noise Penalty

Worst Case Receiver

Max Sensitivity

Min Bandwidth

TP4

TJ r

Reference Channel for Tx DUT (Tx Test Channel)

Pattern

Generator

BERT

TP1

TJ t

DJ t

Transmitter Under Test Test Cable Plant

Test Fiber Type

Test Length

Attenuator

Test Receiver

Test Sensitivity

Test Bandwidth

TP4

TJ t

Reference Channel

Pattern

Generator

BERT

TP1

TJ r

DJ r

Worst Case Transmitter

Min OMA

Min Center Wavelength

Max Spectral RMS Width

Max RIN12 OMA

Max Rise & Fall Times

Worst Case Cable Plant

Fiber Type

Max Length

Max Connector Loss

Max Modal Noise Penalty

Worst Case Receiver

Max Sensitivity

Min Bandwidth

TP4

TJ r

Pattern

Generator

BERT

Reference Channel for Rx DUT (Tx Test Channel)

TP1

TJ t

DJ t

Transmitter Under Test Test Cable Plant

Test Fiber Type

Test Length

Attenuator

Receiver Under Test

TP4

TJ t

Test OMA

Test Center Wavelength

Test Spectral RMS Width

Test RIN12 OMA

Test Rise & Fall Times

Figure 7. Reference and Test Channels for Transmitter

Figure 8. Reference and Test Channels for Receiver

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