Fiber Optic Receiver
Fig. 2 Measuring Method of Output Voltage and Pulse Response
Fiber optic cable
Standard transmitter
MOF-T3C5
V
CC
V
in
V
CC
GND
MOF-R3C5
MOF-R3C5
GND
V
OUT
V
CC
Input
5V
Oscilloscope
CH1
12.5 Mbps NRZ, Duty 50%
CH2
Test item
Test item
Low to High pulse delay time
High to Low pulse delay time
Rise time
Fall time
Pulse width distortion
鈭唗w
= t
PHL
- t
PLH
High level output voltage
Low level output voltage
Symbol
t
PLH
t
PHL
t
r
t
f
Standard transmitter
Input signal
(CH1)
50%
t
r
V
OH
t
f
鈭唗w
V
OH
V
OL
90%
Output signal
(CH2)
V
OL
t
PLH
t
PHL
50%
10%
REV: A1
Unity Opto Technology Co., Ltd.
01/07/2002
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