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(SDT8028-T_-Q_)
Specification : TS-S96D048F
July, 2001
7. Optical Interface
( Unless otherwise specified, Vcc-Vee = 4.75 to 5.25 V @2488.32Mbps, PRBS2^23-1, 50% duty
and all operating temperature shall apply. )
Warning
Do not look at the laser beam projection area (e.g. end of optical connector) with naked eyes or through optical equipment while
the power is supplied to this product. Otherwise, your eyes may be injured.
Parameter
Symbol
Min.
Typ.
Max.
Unit
Note
Optical Output Power
Po
-10.0
-3.0
dBm
Optical Output Power (disable)
Podis
-45.0
dBm
Extinction Ratio
Er
8.2
dB
Center Wavelength
λc
1266
1360
nm
Spectral Width (RMS)
∆λ
4.0
nm
Output Eye Diagram
Compliant with Bellcore G-253 CORE and ITU G957
1
Note1. Refer to Figure 6 for the eye diagram mask
LD
M onito r
PIN -PD
Vc c
Bia s
Circ uit
200
Ω
3k Ω
10
Ω
Pin 3
RFM (+ )
P in 21
B M (-)
P in 22
BM (+)
Pin 4
R FM (-)
APC
Circ uit
3k
Ω
3k
Ω
3k
Ω
Figure 5. BM and RFM Interface
1.25
1.00
0.75
0.25
0
-0 .2 5
0.20
UI
T im e (U I)
01 .0
Logic " 1 "
Logic " 0 "
Figure 6. Eye Diagram Mask for Optical Output
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