FDB-1018 SFP Evaluation Board—December 2005
© Finisar Corporation December 22, 2005 Rev. B Page 1
Product Specification
SFP Evaluation Board
FDB-1018
Finisar’s FDB-1018 Evaluation Board is the
perfect vehicle for testing and evaluating the
new Small Form Factor Pluggable (SFP) optical
transceivers.
The board consists of a single SFP edge
connector and cage, four 50-ohm SMA coaxial
connectors (J8-J11) for the high-speed
differential transmitter input and receiver output
signals, and test points and LEDs for monitoring
all other SFP pins. It is compatible with short
wavelength and long wavelength SFP
transceiver types for use at data rates of
125 Mb/s to 4.25 Gb/s.
The FDB-1018 SFP Evaluation Board is
supplied with software and a DB-25 cable for
communication with a PC parallel port. This
cable allows direct communication between the
PC and the module via the I²C 2-wire serial bus
on pins MOD_DEF(1) and MOD_DEF(2), as
well as for reading the status lines and setting
the TX disable and Rate Select inputs.
The software included with the board provides a
simple windows-based GUI for monitoring the
Serial ID information available in Finisar’s SFP
transceivers.
A switch is provided to assert and test the
transmit disable function (S3). Another switch
(S1) is provided to select the operating bit rate
in those dual rate SFP transceivers that require it
(not required for Finisar’s SFP transceivers). TX
disable can be controlled either by the switch or
the parallel port. Change the position of the
jumper to change controls. Similarly, a jumper
governs the Rate Select control.
SPECIFICATIONS
The FDB-1018 SFP Evaluation Board requires
two supply voltages. A module supply voltage
of 3.1 to 3.6V should be supplied at connector
J2. A 5V ±10% supply, used for the parallel port
communication, should be connected to J1.
Input signals to the TX+ and TX– connectors
should yield a differential swing ranging from
400 mV to 2400 mV, or each have a single-
ended swing ranging from 200 mV to 1200 mV.
Output signals on the RX+ and RX– connectors
may range between 185 to 1000 mV, single-
ended. SFP transceivers have internal AC
coupling on all data lines.
The board layout and schematics are shown
below.
