LB-EO
L-BAND Electrical to Optical Converter
User manual
Rev. F
Nevion
Nordre Kullerød 1
3241 Sandefjord
Norway
Tel: +47 33 48 99 99
nevion.com
LB-EO Rev. F
Nevion Europe
P.O. Box 1020
3204 Sandefjord, Norway
Support phone 1: +47 33 48 99 97
Support phone 2: +47 90 60 99 99
Nevion USA
1600 Emerson Avenue
Oxnard, CA 93033, USA
Toll free North America: (866) 515-0811
Outside North America: +1 (805) 247-8560
E-mail: support@nevion.com
See http://www.nevion.com/support/ for service hours for customer support globally.
Rev.
Repl.
Date
Sign
Change description
F 5 2014-01-15
AJM
Removed 8 discontinued lasers.
5 4 2011-02-21
AA
New template.
Updated Declaration of Conformity.
Removed Chapter 2.4 (Environmental conditions).
4 3 2008-04-01
GMW
Added connector interface description and more
application details in product overview. Added 6
CWDM channels. Added Declaration of Conformity.
3 2 2007-11-02
GMW
Added new product LB-EO-13T 0dBm. Added
Materials Declaration and EFUP.
2 1 2007-09-25
GMW
Changed optical budget to 16dB for 15T/CWDM
and 6dB for 13T
1 0 2007-07-04
GMW
Added specifications for LB-EO-13T
0 A 2007-03-29
GMW
First official version
A - 2006-05-01
GMW
Preliminary version
Nevion Support
Revision history
Current revision of this document is the uppermost in the table below.
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LB-EO Rev. F
Contents
Revision history ........................................................................................................ 2
1 Product overview ................................................................................................... 4
2 Specifications ........................................................................................................ 6
2.1 RF Characteristics ......................................................................................................... 6
2.2 Optical Characteristics .................................................................................................. 6
2.3 Power connection .......................................................................................................... 6
3 Configuration ......................................................................................................... 7
3.1 Format configuration ..................................................................................................... 7
4 Connections .......................................................................................................... 9
4.1 Mounting the connector module ...................................................................................10
4.2 Terminal format support ...............................................................................................10
5 Module status ...................................................................................................... 11
5.1 GPI Alarm – Module status outputs ..............................................................................11
5.2 Front panel – Status monitoring ...................................................................................12
6 Laser safety precautions ..................................................................................... 13
General environmental requirements for Nevion equipment .................................. 14
Product Warranty.................................................................................................... 15
Appendix A Materials declaration and recycling information .................................. 16
A.1 Materials declaration ....................................................................................................16
A.2 Recycling information ...................................................................................................16
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LB-EO Rev. F
1 Product overview
The Flashlink LB-EO is an electrical to fiber optical converter module providing high
performance media conversion for analogue signals with bandwidth from 950 to 2150 MHz.
This state of the art unit offers low noise amplifiers and a high quality laser diode
technology with low distortion and capable of amplifying large signal levels. The attenuator
is a high performance digitally controlled device, giving low distortion and flat frequency
response. The Flashlink LB-EO is therefore the first choice for all optical transport demands
on L-band.
The Flashlink LB-EO converter and the Flashlink LB-OE converter can transport all L-band
signals between 950 and 2150 MHz over long distances using fiber optical transport media.
The optical output comes with a sophisticated wideband laser diode designed to convert the
electrical signal to optical giving very little inter modulation and excellent signal to noise
ratio.
There is also an attenuated electrical monitor output for test and service purposes as well
as a remote control interface.
Figure 1: LB-EO L-band electrical to optical converter.
This L-band link is normally used in conjunction with other equipment like satellite tuners,
LNBs in parabolic dishes etc, and the link performance is dependant of good signal to noise
ratio from the signal source and good noise figure of the receiver equipment. The link
quality is also dependant of the number of channels transferred on the link. For instance,
the link’s signal to noise ratio is reduced with 3dB when doubling the number of the
channels (twice the power).
An optical link will add some noise to the signal. The amount of noise is dependant of the
fiber loss, the satellite receiver sensitivity, number of channels and the total power level of
the signal. The combination if analogue and digital satellite signals is also important. Many
analogue satellite signals (which tend to have higher power), will reduce the signal to noise
ratio on the digital signals. This is because the link’s power must be reduced according to
the total power of the link.
Noise figure of the link is a number usually in dB that states how much the signal to noise
ratio (S/N ratio) is reduced from the input to the output. If the S/N ratio from the dish is X
dB, the noise figure on the link is Y dB, the S/N ratio on the output will be X-Y dB.
Dependant on the application (fiber loss, total power on signal and power of the laser), one
link will typically add 4-5dB noise for fiber distances less than 3000 meters.
A coaxial cable will attenuate more on higher frequencies than lower. If the attenuation on
2GHz is more than the noise figure for the L-band link, there will be a system improvement
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LB-EO Rev. F
regarding total signal to noise ratio. Therefore, to distance from the dish to the receiver
must be significant (more than 200 meters, dependant of the coaxial cable specification) for
getting return of the investment of the L-band link. If the application needs galvanic
isolation, the L-band link is a very good way to achieve this.
It is recommended that the wavelengths 1590 and 1610 nm are reserved for digital
communication in CWDM systems due to fiber distortion issues (see fiber specification).
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