Delta Electronics Sonet STM-16 - Manual (Page 4)

DELTA ELECTRONICS, INC.
4 Dec., 2006
Rev. 0E
www.deltaww.com
Mean level of logical “1”
Mean level of logical “0”
A
m
p
li
tude
Time
Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957
1.25
1.00
0.75
0.25
0.00
-0.25
Mean level of logical “1”
Mean level of logical “0”
A
m
p
li
tude
Time
Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957
1.25
1.00
0.75
0.25
0.00
-0.25
Mask of the eye diagram for the optical transmit signal
Recommend Circuit Schematic
Laser Diode
Photo Diode
1uH
1uH
0.1uF 10uF
0.1uF
0.01uF
0.01uF
0.01uF
0.01uF
0.1uF 10uF
RES1
RES1
100 Ohms*
RES1 RES1 RES1
10k Ohms
100 Ohms
VCC
Protocol Vcc
SerDes IC Protocol IC
PLD / PAL
Mod_def 2
Mod_def 1
Mod_def 0
3.3V
3.3V
DELTA SFP Module
Preamp &
Tx_Disable
Quantizer
Tx_Fault
TD +
TD -
VeeT
RD +
RD -
Rx_LOS
VeeR
Tx_Disable
Tx_Fault
Rx_LOS
RES1 = 4.7k to 10k Ohms
VccT
VccR
Laser Driver
* Depands on SerDes IC used
EEPROM