V23818-C18-Lxx/L4xx

Technical Data

Data Sheet

10

2003-06-06

Jitter

The transceiver is specified to meet the SONET/SDH Jitter performance as outlined in

ITU-T G.958 and Telcordia GR-253.

Jitter Generation is defined as the amount of jitter that is generated by the transceiver.

The Jitter Generation specifications are referenced to the optical OC-3 signals. If no or

minimum jitter is applied to the electrical inputs of the transmitter, then Jitter Generation

can simply be defined as the amount of jitter on the Tx optical output. The SONET

specifications for Jitter Generation are 0.01 UI RMS, maximum and 0.1 UI pk-pk,

maximum. For SDH, 10 mUI RMS, maximum. Both are measured with a 12 kHz -

1.3 MHz filter in line. A UI is a Unit Interval, which is equivalent to one bit slot. At OC-3,

the bit slot is 6.4 ns, so the Jitter Generation specification translates to 64 ps RMS, max.

and 640 ps pk-pk, max.

Transmitter Electro-Optical Characteristics

Transmitter

Symbol

Limit Values

Unit

min.

typ.

max.

Output Power (Average)

1)

P

O

–15

–8

dBm

Center Wavelength

λ

C

1260

1360

nm

Spectral Width (FWHM)

D

l

7.7

nm

Extinction Ratio (Dynamic)

ER

8.2

dB

Output Rise Time

t

R

0.6

2.5

ns

Output Fall Time

t

F

0.6

3

ns

Reset Threshold for

V

CCt

2)

V

TH

2.7

V

Power on Delay

2)

t

RES

30

ms

Eye Diagram

3)

ED

ITU-T G.957 mask pattern

Jitter Generation

J

0.1

UI

J

0.01

UI

T

V

TDH

2V

T

V

TDL

0.8

V

T

4)

t

ASS

0.4

1

ms

T

5)

t

DAS

0.06

10

µs

1)

Into single mode fiber, 9 µm diameter.

2)

Laser power is shut down if power supply is below V

3)

Transmitter meets ANSI T1E1.2, SONET OC-3, and ITU-T G.957 mask patterns.

4)

T

5)

T