Fiber Optic Transmitter
MOF-T3K3
Fig.3 Measuring Method of Pulse Response
MOF-T3K3
Unit to be measured
VCC
Vin
GND
VCC
Input
Standard optical fiber cable
Oscilloscope
CH1
CH2
Output signal
Standard receiver
110 0
4 Mbps biphase
PRBS signal
Input signal
Standard receiver output
50%
t PLH
t PHL
50%
Test item
Test item
Low →High pulse delay time
High →Low pulse delay time
Pulse width distortion
Symbol
t PLH Refer to the above prescriptions
t PHL Refer to the above prescriptions
∆tw ∆tw=t PHL- t PLH
Test condition
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.
Unity Opto Technology Co., Ltd.
4/4
REV : A2
09/11/2001