Fiber Optic Transmitter
MOF-T3K3
Fig.3 Measuring Method of Pulse Response
Standard optical fiber cable
Output signal
Standard receiver
MOF-T3K3
Unit to be measured
VCC
GND
Vin
Oscilloscope
VCC
CH1
CH2
Input
Input signal
50%
1
1
0
0
t PLH
t PHL
4 Mbps biphase
PRBS signal
Standard receiver output
50%
Test item
Test item
Symbol
t PLH
Test condition
Low →High pulse delay time
High →Low pulse delay time
Pulse width distortion
Refer to the above prescriptions
Refer to the above prescriptions
t PHL
Dtw Dtw=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
09/11/2001
Unity Opto Technology Co., Ltd.
4/4
UOT [ UNITY OPTO TECHNOLOGY ]
