Fiber Optic Transmitter
Fig.3 Measuring Method of Pulse Response
MOF-T2C2
Standard optical fiber cable
MOF-T2C2
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%
6.25Mbps biphase
PRBS signal
Standard receiver output
t
PLH
t
PHL
50%
Test item
Test item
Low to High pulse delay time
High to Low pulse delay time
Pulse width distortion
Symbol
Test condition
Refer to the above prescriptions
Refer to the above prescriptions
鈭唗w=t
PHL
- t
PLH
t
PLH
t
PHL
鈭唗w
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 V (State of operating)
(3) The probe for the oscilloscope must be more than 1M and less than 10pF.
Unity Opto Technology Co., Ltd.
REV : A1
01/08/2002
4/4
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