Sharp R-332 Manual do Utilizador descarregar pdf (Página 7)

GP1F31T/R, GP1F32T/R, GP1F33TT/RR/RT, GP1C331/331A/332/333/334/335

Fig.8 Measuring Method of Jitter

Oscilloscope

Trigger : CH1

Storage mode

Sweep : AUTO/NORM

CH2

CH1

out

GND

Unit to be measured

GP1F33RR/GP1F33RT

GP1F31R/GP1F32R/

Standard optical fiber cable

Input

Transmitter

GP1F33TT

GP1F31T/GP1F32T/

50%

Input signal

GP1F31R output

GP1F32R output

GP1F33RR output

GP1F33RT output

0 0

Input signal 3Mbps

biphase PRBS

GNDV

∆tj∆tj

Notes (1) R

: Strandard load resistance

: 3.3Ω R

: 2.2kΩ)

(2) V

CC=5.0±0.05V (Operating)

(3) Set the oscilloscope to be storage mode and

write time to 3 seconds. Do not allow the

waveform to be distorted by icreasing the

brightness too much.

(4) The probe for oscilloscope must be more

than 1MΩ and less than 10pF.

Fig.9 Measuring Method of Optical Output Coupling With Fiber

Standard

transmitter

Standard optical fiber cable

power meter

Optical

Anritsu

ML93B

Standard light transmitter : Light transmitter that provides the fiber-end optical output of −15dBm±0.3dBm when

the standard fiber optic cable is connected.

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