Finisar FWDM-1629-XX User Manual download pdf (Page 5)

FWDM-1629-XX DWDM SFP Preliminary Product Specification – February 2005 F i n i s a r

 Finisar Corporation PRELIMINARY and Confidential Page 5

Rev C, February 2005

IV. Low Speed Signals

Parameter

Symbol Min

Typ Max Units Notes/Conditions

RX_LOS Assert Level -42 -36 dBm

RX_LOS Deassert Level -34 -32 dBm

RX_LOS Hysteresis 0.5 2 dB

RX_LOS Assert Delay t_loss_on

100

µsec

From detection of loss of signal

to assertion of RX_LOS

RX_LOS Negate Delay t_loss_off

100

µsec

From detection of presence of

signal to negation of RX_LOS

TX_DISABLE Assert Time t_off 10

µsec

Rising edge of TX_DISABLE to

fall of output signal below 10%

of nominal

TX_DISABLE Negate Time t_on 1000

µsec

Falling edge of TX_DISABLE

to rise of output signal above

90% of nominal. Time

indicated is under steady-state

temperature conditions.

TX_DISABLE Reset Time t_reset 10

µsec

TX_DISABLE HIGH before

TX_DISABLE set LOW

TX_FAULT Assert -0.2 +0.2 nm TX_Fault will assert before the

device is outside of specified

wavelength range

1 2 3 4 5 6 7 8 9 10

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Finisar FWDM-1629-XX User Manual Page 5