Fiber Optic Transmitter
MOF-T3K4
Fig.3 Measuring Method of Pulse Response
Standard optical fiber cable
MOF-T3K4
Unit to be measured
V
CC
V
in
GND
Standard receiver
Output signal
Oscilloscope
V
CC
CH1
CH2
Input
Input signal
1
1
0
0
50%
4 Mbps biphase
PRBS signal
Standard receiver output
t
PLH
t
PHL
50%
Test item
Test item
Low
→High
pulse delay time
High
→Low
pulse delay time
Pulse width distortion
Symbol
Test condition
t
PLH
Refer to the above prescriptions
t
PHL
Refer to the above prescriptions
∆tw ∆tw=t
PHL
- t
PLH
Notes (1) The waveform write time shall be 4 seconds. But do not allow the waveform to be distorted by increasing the brightness too much.
(2 ) Vcc=5.0 (State of operating)
(3) The probe for the oscilloscope must be more than 1M and less than 10pF.
REV : A2
Unity Opto Technology Co., Ltd.
09/20/2001
4/4
UOT [ UNITY OPTO TECHNOLOGY ]
