Finisar FWDM-1629-XX manual Low Speed Signals, Parameter Symbol Min Typ Max Units

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

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

© Finisar Corporation	PRELIMINARY and Confidential	Page 5
Rev C, February 2005