Nevion LB-OE User Manual Rev.E

LB-OE

L-BAND Optical to Electrical Converter

User manual

Rev. E

Nevion

nevion.com

Nordre Kullerød 1
3241 Sandefjord
Norway
Tel: [phone]

LB-OE Rev. E

Nevion Europe
P.O. Box 1020

3204 Sandefjord, Norway
Support phone 1: [phone]
Support phone 2: [phone]

Nevion USA

1600 Emerson Avenue

Oxnard, CA 93033, USA

Toll free North America: [phone]

Outside North America: +1 (805) 247-

8560

E-mail: [e-mail]

See http://www.nevion.com/support/ for service hours for customer support globally.

Rev.

Repl.

Date

Sign

Change description

E 4 2015-05-12

MB

Cover page update.
Removed Declaration of Conformity.
No other changes to content.

4 3 2011-02-21

AA

New template.
Updated Declaration of Conformity.
Removed Chapter 2.5 (Environmental
conditions).

3 2 2008-04-01

GMW

Added connector interface description and more
application details in product overview. Added
Declaration of Conformity.

2 1 2007-11-01

GMW

Changed maximum optical input from 0dBm to

-3dBm

1 0 2007-09-25

GMW

Changed optical budget to 16dB for 15T/CWDM
and 6dB for 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-OE Rev. E

Contents

Revision history ...................................................................................................................... 2

1 Product overview ................................................................................................................. 4

2 Specifications ................................................................................................ ...................... 6

2.1 RF Characteristics ............................................................................................................ 6

2.2 LNB Power Connector ...................................................................................................... 6

2.3 Optical Characteristics ...................................................................................................... 6

2.4 Power consumption .......................................................................................................... 6

3 Configuration ................................ ................................................................ ....................... 7

3.1 Format configuration ........................................................................................................ 7

4 Connections ........................................................................................................................ 8

4.1 Mounting the connector module ....................................................................................... 8

4.2 Terminal format support ................................................................................................... 9

5 Module status .................................................................................................................... 10

5.1 GPI Alarm – Module status outputs ................................................................ ................ 10

5.2 Front panel – Status monitoring ...................................................................................... 11

6 Laser safety precautions ................................................................................................... 12

General environmental requirements for Nevion equipment ................................................. 13

Product Warranty ................................................................................................................. 14

Appendix A Materials declaration and recycling information ................................................. 15

A.1 Materials declaration ...................................................................................................... 15

A.2 Recycling information ..................................................................................................... 15

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LB-OE Rev. E

1 Product overview

The Flashlink LB-OE is an optical to electrical converter module providing high
performance media conversion for analogue signals with bandwidth from 950 to 2150
MHz. This state of the art unit offers a high sensitivity PIN diode technology followed by
amplifiers with low noise, 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 LB-OE is therefore the first choice for all optical
transport demands on L-band.

The LB-OE together with LB-EO, can transport all L-band signals between 950 and
2150 MHz over large distances using fiber optical transport media. The optical input
comes with a sophisticated wideband PIN diode with a sensitivity typically better than –
20dBm operating in the 2nd and 3rd optical windows. The open system platform of
Network Electronics Flashlink system allows easy interoperability with third party fiber
optical systems.

There is also an attenuated monitor output for test and service purposes as well as a
remote control interface.

Figure 1: LB-OE L-band O/E 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

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LB-OE Rev. E

improvement 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
functionality.

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