Fiber Optic Receiver
Fig. 2 Measuring Method of Output Voltage and Pulse Response
Fiber optic cable
Standard transmitter
MOF-T3C2
V
CC
V
in
V
CC
GND
MOF-R3C2
MOF-R3C2
GND
V
OUT
V
CC
Input
5V
Oscilloscope
CH1
13.2 Mbps NRZ, Duty 50%
CH2
Test item
Test item
Low
→High
pulse delay time
High
→
Low pulse delay time
Rise time
Fall time
Pulse width distortion
Δtw
= 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
Δtw
V
OH
V
OL
90%
Output signal
(CH2)
V
OL
t
PLH
t
PHL
50%
10%
REV: A3
Unity Opto Technology Co., Ltd.
04/01/2002
4/4
UOT [ UNITY OPTO TECHNOLOGY ]
