Detectors
Laser
Diodes
Evaluation Test Board for GDL1000T-228
EVAL-GDL1000T-228
APPLICATION NOTE
Evaluation Test Board
with 1.25 Gbps OptoLock
For 1.25 Gbps 650 nm RCLED-based
Fiber Optic Transceiver with Termination
for Bare POF
DESCRIPTION
FEATURES
•
•
•
•
•
•
•
•
Test board for transceiver testing
Direct connection to standard pattern generators
Compatible with high speed 50 Ohm terminated test
equipment
3.3V DC power
Indicator LED for signal detect on the receiver average
optical power level
AC coupled data lines compatible with LVDS/CML data
bus
Eye safe
Jumper pin options for separate TX and RX
enable/disable
Firecomms’ EVAL-GDL1000T-228 evaluation test
board provides a simple testing platform for
evaluation of standard NRZI data links operating
from a minimum data rate of 100 Mbps up to a
maximum of 1.25 Gbps.
The end-launch SMA connectors facilitate easy
SMA-coax cable links to standard 50 Ohm
terminated test equipment such as high speed
oscilloscopes and pattern generators.
The data lines are AC coupled. Power is supplied
via a simple screw-down connector and requires
3.3V DC voltage.
Jumper pin options are provided to
enable/disable the TX transceiver and to
enable/disable an indicator LED on the signal
detect (SD) line.
This test board is ideal for evaluation of a high
speed plastic optic fiber link. A single board can
be used in loop-back, or a pair of test boards will
provide the capability to test full-duplex
operation.
EVAL-GDL1000T-228 (Preliminary) Revision P1
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
1 Laser Components (UK) Ltd.
United Kingdom
Goldlay House, 114 Parkway
Chelmsford Essex CM2 7PR
Tel: +44 1245 491 499
Fax:+44 1245 491 801
info@lasercomponents.co.uk
www.lasercomponents.co.uk
Detectors
Laser
Diodes
EVAL-GDL1000T-228
APPLICATION NOTE 2
SCHEMATIC
FIGURE 1
Schematic for the Evaluation Test Board, EVAL-GDL1000T-228
TEST CONFIGURATION: LOOP-BACK
FIGURE 2
Loop-back test configuration for Evaluation Test Board, EVAL-GDL1000T-228
In loop-back test mode a single strand of POF is ‘looped’ from the transmitter back into the receiver side of the
same OptoLock® connector. The transmitter is driven from a pattern generator which typically uses a PRBS-7 data
pattern which is 8B10B encoded. The test PCB has on-board AC coupling and is compatible with an LVDS data bus
using differential voltage swings of minimum 500mV to maximum 1200mV.
Current consumption can be estimated by measuring the current supplied to the PCB on its 3.3V DC interface.
EVAL-GDL1000T-228 (Preliminary) Revision P1
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
2 Laser Components (UK) Ltd.
United Kingdom
Goldlay House, 114 Parkway
Chelmsford Essex CM2 7PR
Tel: +44 1245 491 499
Fax:+44 1245 491 801
info@lasercomponents.co.uk
www.lasercomponents.co.uk
Detectors
Laser
Diodes
EVAL-GDL1000T-228
APPLICATION NOTE 3
TEST CONFIGURATION: LOOP-BACK (Continued)
FIGURE 3
GDL1000T-228 Evaluation Test Board configured for loop-back test
MAXIMUM TRANSMISSION DISTANCE
POF Type
Outer Diameter (mm)
Transmission Distance (m)
[1]
2.2
5
[2]
2.2
5
2.2
30
PMMA 1 mm SI POF, 0.5 NA
PMMA 1 mm MultiCore POF
[3]
PMMA GI POF
Notes:
1. Supplier Mitsubishi Rayon Co Ltd., p/n GH 4002
http://www.pofeska.com/pofeskae/product/02/index.html
2. Supplier Asahi Kasei Corporation, p/n SMCK 1000P
http://www.asahi-kasei.co.jp/ake-mate/pof/en/product/multi-core.html
3. Supplier Optimedia Inc., p/n OM-Giga
http://www.optimedia.co.kr/eng_optimedia_main_b_01.htm
EVAL-GDL1000T-228 (Preliminary) Revision P1
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
3 Laser Components (UK) Ltd.
United Kingdom
Goldlay House, 114 Parkway
Chelmsford Essex CM2 7PR
Tel: +44 1245 491 499
Fax:+44 1245 491 801
info@lasercomponents.co.uk
www.lasercomponents.co.uk
Detectors
Laser
Diodes
EVAL-GDL1000T-228
APPLICATION NOTE 4
TEST CONFIGURATION: FULL-DUPLEX
FIGURE 4
Full-duplex test configuration for Evaluation Test Board, EVAL-GDL1000T-228
Full-duplex testing requires two test boards and two independent pattern generators. The separate pattern
generators guarantee that the data seen by the receiver is uncorrelated to the data being sent by the transmitter in
the same GDL1000T OptoLock. This test set-up accounts for cross-talk between TX and RX and allows evaluation of
real world operation. By operating in full-duplex mode it is possible to duplicate protocols like 1000BaseSX, the
GigE over fiber standard.
EVAL-GDL1000T-228 (Preliminary) Revision P1
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
4 Laser Components (UK) Ltd.
United Kingdom
Goldlay House, 114 Parkway
Chelmsford Essex CM2 7PR
Tel: +44 1245 491 499
Fax:+44 1245 491 801
info@lasercomponents.co.uk
www.lasercomponents.co.uk
Detectors
Laser
Diodes
EVAL-GDL1000T-228
APPLICATION NOTE 5
PERFORMANCE EXAMPLES
FIGURE 5
GDL1000T-228 receiver operation at -20°C, -13dBm
FIGURE 6
GDL1000T-228 receiver operation at +25°C, -13dBm
FIGURE 7
GDL1000T-228 receiver operation at +70°C, -13dBm
EVAL-GDL1000T-228 (Preliminary) Revision P1
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
5 Laser Components (UK) Ltd.
United Kingdom
Goldlay House, 114 Parkway
Chelmsford Essex CM2 7PR
Tel: +44 1245 491 499
Fax:+44 1245 491 801
info@lasercomponents.co.uk
www.lasercomponents.co.uk
Detectors
Laser
Diodes
EVAL-GDL1000T-228
APPLICATION NOTE 6
ORDERING INFORMATION
ORDERING INFORMATION
03/12 / V1 / HW / firecomms/eval-gdl1000t-228.indd
Part Number
EVAL-GDL1000T-228
Name
Transceiver Evaluation Test
Board
Description
Transceiver Evaluation Test Board for GDL1000T-228
Contains:
•
Evaluation test PCB with GDL1000T-228 transceiver
already mounted (qty 1)
•
1 m of Step Index Plastic Optical Fiber
(2.2 mm jacket, black, 1 mm core 0.5NA)
•
Product documentation
CONFIDENTIAL PROPRIETARY INFORMATION
This document contains confidential proprietary information originated by FIRECOMMS Ltd. and/or its customers and suppliers. Information herein shall
not be copied or distributed, nor shall the concepts or specifications be disclosed or used by any unauthorized party without prior written notice and
consent by an officer of Firecomms Ltd. The delivery and receipt of this document does not convey any rights to reproduce, disclose, manufacture, use or
sell anything incorporating the proprietary or value-added information provided herein. All patent and trade secret rights are expressly reserved.
EVAL-GDL1000T-228 (Preliminary) Revision P1
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
© 2012 Firecomms Ltd. All rights reserved. OptoLock is a registered trademark of Firecomms Ltd, and is protected by U.S.
Patents 7597485 and 7905665 and similar patents in other countries.
6 Laser Components (UK) Ltd.
United Kingdom
Goldlay House, 114 Parkway
Chelmsford Essex CM2 7PR
Tel: +44 1245 491 499
Fax:+44 1245 491 801
info@lasercomponents.co.uk
www.lasercomponents.co.uk