Delta Electronics LCP-4250A4CDR manual Mask of the eye diagram for the optical transmit signal

Optical Characteristics

(VCC=3.135V to 3.465V, Data Rate=4.25Gb/sec, PRBS=27-1 NRZ, 50/125µm MMF)

Parameter Symbol Min. Typ. Max.

Transmitter

Unit

Note

Output Optical Power (Avg.)	PO	-9	-3	dBm	1
Optical Modulation Amplitude		247
@ 4.25 Gb/s	OMA			µW	2
@ 2.125 Gb/s		196
@ 1.0625 Gb/s		156	860
Center Wavelength	λ	830		nm
Spectral Width (RMS)	σ		0.85	nm
Optical Rise/Fall Time (20% - 80%)	tr/ tf		90/90	psec	3
Relative Intensity Noise	RIN		-118	dB/Hz
Output Eye	Complies	with the ANSI FC-PI Rev. 13 specification, and is class 1
	laser eye safety
Receiver

Average Receiver Power	Px (MAX)
Sensitivity in OMA
@ 4.25 Gbit/s	PIN
@ 2.125 Gb/s
@ 1.062 Gb/s
Input Optical Wavelength	λ	830
LOS-De-asserted (Avg.)	PD
LOS-Asserted (Avg.)	PA	-30
LOS-Hysteresis	PD -PA	0.5
Optical Return Loss	ORL	12

-3

61

49

31

870

-19

dBm .

uW 4

nm

dBm

dBm

dB

dB

Notes:

1.Into multimode fiber, 62.5µm or 50µm diameter.

2.Equivalent extinction ratio specification for Fiber Channel. Allows smaller ER at higher average power.

3.Measured at nominal data rate. These are unfiltered 20%~80% values.

4.The sensitivity is tested at a BER of 1×10-12or better with an input signal consisting of 27-1 NRZ PRBS.

Mask of the eye diagram for the optical transmit signal

3	2008/3/18
	Rev. 0A
DELTA ELECTRONICS, INC.	www.deltaww.com