Agilent Technologies N4970A Manual do Utilizador descarregar pdf (Página 6)

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Applications:

Optical Receiver Stress Test

Stress conditioning for 40 GBASE-LR4 and 100 GBASE-LR4, ER4

• Sinusoidal amplitude interferer 1: Causes Sinusoidal Jitter (SJ) in

conjunction with limiter

• Gaussian noise generator: Causes Random Jitter (RJ) in conjunction

with limiter

• Limiter: Restores signal edges (fast rise and fall times)

• Sinusoidal amplitude interferer 2: Causes additional Vertical Eye

Closure (VECP) and Sinusoidial Jitter (SJ)

• Low-pass filter: Creates ISI-induced Vertical Eye Closure (VECP)

Stress conditioning for 16 GFC

• Coaxial cable: Causes Deterministic Jitter (DJ) in conjunction with

limiter

• Limiter: Restores signal edges (fast rise and fall times)

• 4th Order Bessel Thomson Filter: Creates ISI-induced Vertical Eye

Closure (VECP)

Stress conditioning setup:

Stress conditioning varies depending on the standard and the speed class

of the component. But the principle of stress conditioning remains the

same:

• Firstly, this block adds different types of jitter, like random jitter,

periodic jitter or sinusoidal jitter, to generate defined horizontal

closure of the test pattern’s eye shape

• Secondly, this block exposes different types of amplitude distortions,

like sinusoidal amplitude interference and low-pass filtering, to

generate defined vertical closure of the eye-shape

Stress conditioning for 10 GbE and 10 GFC

• 4th Order Bessel Thomson Filter: Creates ISI-induced Vertical Eye

Closure (VECP)

• Sinusoidal Amplitude Interferer: Causes Sinusoidal Jitter (SJ) in

conjunction with limiter

1 2 3 4 5 6 7 8 9 10 11 ... 39 40

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Agilent Technologies N4970A Manual do Utilizador Página 6