Справочник Пользователя для LevelOne 1.25G SMF GBIC Transceiver, 10km, 1310nm GVT-0201-v1
Модели
GVT-0201-v1
4
Block Diagram of Transceiver
Dimensions
POST-Amp
&
LOS Detect
LD Driver
&
Fault Sense
RRE-
AMPLIFIER
IC
LASER
DATA
DATA/
DATA
DATA/
ELECTRICAL SUBASSEMBLY
OPTICAL
SUB-
ASSEMBLIES
Photo
Diode
DUPLEX SC
RECEPTACLE
RX_LOS
TOP VIEW (Label side)
MOD_DEF
(0)
(1)
(2)
(1)
(2)
TX_DISABLE
TX_FAULT
TX_FAULT
Transmitter Section
The transmitter section consists of a 1310 nm InGaAsP laser in
an eye safe optical subassembly (OSA) which mates to the fiber
cable. The laser OSA is driven by a LD driver IC which converts
differential input LVPECL (3.3V) or PECL (5V) logic signals into
an analog laser driving current.
TX_DISABLE
The TX_DISABLE signal is high (TTL logic “1”) to turn off the
laser output. The laser will turn on when TX_DISABLE is low (TTL
logic “0”).
ALL DIMENSIONS ARE±0.20mm UNLESS OTHERWISE SPECIFIED
Unit: mm
Receiver Section
The receiver utilizes an InGaAs PIN photodiode mounted
together with a trans-impedance preamplifier IC in an OSA.
This OSA is connected to a circuit providing post-amplification
quantization, and optical signal detection.
Receive Loss (RX_LOS)
The RX_LOS is high (logic “1”) when there is no incoming light
from the companion transceiver. This signal is normally used by
the system for the diagnostic purpose. The signal is operated in
TTL level.