Nevion LB-EO User Manual Rev.F

LB-EO

L-BAND Electrical to Optical Converter

User manual

Rev. F

Nevion

Nordre Kullerød 1
3241 Sandefjord
Norway
Tel: [phone]

nevion.com

LB-EO Rev. F

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: [phone]

E-mail: [e-mail]

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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LB-EO Rev. F

Frequency band width

950-2150 MHz

Return loss

>10dB

RF interface

F-connector

Gain flatness

±1.5dB over entire band
±0.25dB at any 36 MHz

Maximum usable input
signal

< -5dBm

Maximum input signal
without damage

>+10dBm

Inter modulation products
(two carriers, 5dB optical
loss)

< -55dBc (15T/CWDM)
< -45dBc (13T)
Link gain

40dB

Optical link budget

16dB/50km (15T/CWDM)
6dB (13T)

1dB compression (output)

0dBm

Noise figure

<10dB @ 3dB fiber optical loss
<20dB @ 16dB fiber optical loss

Carrier to noise ratio
(CNR)with maximum input
power

>45dB @ 36MHz (15T/CWDM)
>35dB @ 36MHz (13T)

Spurious free dynamic
range (SFDR) – input signal
level -25dBm

>110dBc/Hz

Wavelength

1310nm ±40nm,
8 CWDM channels ±2nm ,
(1470, 1490, 1510, 1530, 1550, 1570, 1590 and 1610 nm)

Power output

+3dBm (15T/CWDM)
0dBm or -3dBm (13T)

Optical interface

SC/UPC, Single mode

Maximum power
consumption

<3W (+5V)
<1.5W (-15V)
<1.5W (+15V)

2 Specifications

2.1 RF Characteristics

2.2 Optical Characteristics

2.3 Power connection

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LB-EO Rev. F

3 Configuration

3.1 Format configuration

The LB-EO can be configured in three different modes:

 Automatic gain control (AGC mode)
 Manually controlled gain using rotary switches (SW2 and SW3)
 Sample AGC (automatically adjust gain and lock gain adjustment)

The configuration can either be set with a DIP switch or with the Flashlink GYDA Control
System. The layout of the Flashlink LB-EO is shown in the drawing below with the DIP
switch to the upper left position.

Figure 2: LB-EO board layout.

For setting the gain manually, use the rotary switches SW2 and SW3 situated near the
extractor handle. The two switches make a two digit number. SW3 is the tens and SW2 is
the ones. The number is gain in decibel (0-31dB). If larger number than 31 is set, the gain
will be 31. An ideal setting for the attenuator is LOS green and no light in LEVEL. Decrease
the number until LEVEL orange, and then increase the number one by one until LEVEL
stops lighting.

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LB-EO Rev. F

Switch

#

Label

Function,
DIP = ON

Function,

DIP = OFF

Comment

1

AGC

Automatic gain
control

Manual gain control

2 R/S

Run AGC

Sample AGC level

Only valid in Manual gain
control

3

LNB

Enable power
supply for LNB

Disable power
supply for LNB

4 H/V

Horizontal
polarization

Vertical polarization

Sets voltage on LNB

5

LLC

Line length
compensation on

Line length
compensation off

If on, output voltage from card
to LNB will increase by 1 volt.
Set to ON when using long
cables (cable more than
approx 3 ohms DC resistance
in cable)

6

H/L

High band

Low band

22kHz tone control

7

GPI

H/V and H/L
controlled by GPI

H/V and H/L
controlled by DIP
or GYDA

When GPI is set, DIP 4 and 6
will be disregarded

8

OVR

Override GYDA
control. Config.
with DIP switch

GYDA control.
Config. with GYDA

Select configuration from
GYDA

DIP switch configuration must be set according to the table below:

All DIP switches are off when pointing towards the release handle.

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LB-EO Rev. F

4 Connections

The Flashlink LB-EO has a dedicated connector module: LB-EO-C1. This module is
mounted at the rear of the sub-rack. The module is shown in the figure below.

Monitor Fiber optical
output

RF input

LNB power supply GPI

Figure 3: Connector module for L-band.

In typical use, an LB-EO / LB-OE module at each end will be used. An LNB is connected to
the F-connector of the LB-EO, and a satellite tuner is connected to the F-connector of the
LB-OE. The voltage/22kHz output from the satellite tuner, can not be transferred on the
fiber between LB-EO and LB-OE, because this signal goes the other way. The LB-OE can
nevertheless detect voltage and/or tone, and put them to the GPI output on the LB-EO.
Using a separate communication line (two digital signals using D422MG or similar), these
signals can be transferred to the LB-EO.

LB-EO tone/voltage output on the RF-connector can be controlled is three different ways:
directly using GYDA, DIP switches or the GPI inputs (see chapter 3.1 for DIP switch
settings).

The LB-OE will always detect the voltage/tone from the satellite tuner or other equipment,
and set the GPI according to the detected tone and voltage. A 22 kHz tone on top of the
LNB power supply indicates high band (11.7-12.75 GHz) and no tone is for low band (10.7-

11.7 GHz).
Vertical polarization is chosen with a voltage less than 15 volts, typically 13 volts. Most

LNBs will set vertical polarization within a voltage window (for instance from 11.5 to 14.2
volts dependant of the LNB). Accordingly the horizontal polarisation is voltage greater than
15 volts, typically 18 volts (for instance from 15.8 to 19.0 volts). If the voltage is near 15 (for
instance between 14.2 and 15.8), the polarization will be uncertain. The example voltages
are LNB manufacturer dependant, please check the user manual for the LNB voltage
thresholds. If the RF coaxial cable is long, there will be a DC loss. By adding one volt out
from the LB-EO, longer cables can be used without risking getting the wrong polarization.
This configuration is called LLC (long line compensation).

There is also a power connection for LNB. Connect pin 4 to a positive voltage (+12V to
+24V) and pin 1 to power supply ground. The frame power supply can only supply 15W

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LB-EO Rev. F

Terminal

Function

Supported Format

Mode

OPT

Optical output

Analogue 950-2150 MHz

Output

RF

Electrical input

Analogue 950-2150 MHz

Input

Monitor

Electrical output
(attenuated)

Analogue 950-2150 MHz

Output

GPI Input

Control High/low band
and polarity

Digital input

CMOS Input
GPI Output

Data Output

Digital output

Open collector output

GPI
ALARM

Open Collector Alarms

Wired alarms

Open Collector Output

totally on +15V, and external power supply must be used if 15W is exceeded. LNBs can
draw up to 9W, please check the LNB’s user manual for current consumption.

The LB-EO LNB power supply connector powers only its own LNB, so each backplane
must be connected to a power supply (or daisy chained if the power can handle the total
current needed for all the LNBs). The pinning is the same as a Sublime power supply, and it
is possible to use this desktop power for the LNBs.

4.1 Mounting the connector module

The details of how the connector module is mounted, is found in the user manual for the
sub-rack frame FR-2RU-10-2.

This manual is also available from our web site: http://www.nevion.com/

4.2 Terminal format support

The different input and output ports on LB-EO can support a number of formats. The table
below shows which signal formats are supported on the selected terminals.

Terminal format support:

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LB-EO Rev. F

Signal

Name

Pin #

Mode

Status

General error status for the module

Pin 1

Open Collector

LOS

Loss of Signal (open = signal detected)

Pin 2

Open Collector

LEVEL

Level too high (open = level ok)

Pin 3

Open Collector

H/L

High/low band (ground for 22kHz tone enable/high
band)

Pin 4

CMOS Input

H/V

Horizontal/vertical polarization (ground for vertical
polarisation)

Pin 5

CMOS Input
DATA

Data output

Pin 6

Open Collector

Ground

0 volt pin

Pin 8

0V.

5 Module status

The status of the module can be monitored in three ways.

1. GYDA System Controller (optional).

2. GPI at the rear of the sub-rack.

3. LED’s at the front of the sub-rack.

Of these three, the GPI and the LED’s are mounted on the module itself, whereas the

GYDA System Controller is a separate module giving detailed information on the card
status. The functions of the GPI and the LED’s are described in sections 5.1 and 5.2. The
GYDA controller is described in a separate user manual.

5.1 GPI Alarm – Module status outputs

These outputs can be used for wiring up alarms for third party control systems. The GPI
outputs are open collector outputs, sinking to ground when an alarm is triggered. The GPI
connector is shown in figure below.

LB-EO module GPI pinning:

Electrical Maximums for GPI outputs
Max current: 100 mA
Max voltage: 30 V

Figure 4: GPI output.

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LB-EO Rev. F

Diode / State

Red LED

Green LED

Orange LED

No light

STATUS

Module is faulty,
or module is
initialising.

Module is OK
Module power is
OK

Module has
no power

LOS

No signal

Signal is present

Module has
no power

LEVEL

Signal level too
high – increase
attenuation or
reduce input level

Signal level
critical - increase
attenuation or
reduce input level

Signal level
not critical
LASER FAIL

Laser failure

Laser OK

Module has
no power

5.2 Front panel – Status monitoring

The status of the module can be easily monitored visually by the LED’s at the front of the
module. The LED’s are visible through the front panel as shown in the figure below.

Figure 5: Front panel indicators for the LB-EO.

The LB-EO has 4 LED’s each showing a status showed in the table below.

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LB-EO Rev. F

1

6 Laser safety precautions

These are guidelines to limit hazards from laser exposure.
All the available EO units in the Flashlink range include a laser. Therefore this note on laser

safety should be read thoroughly.
The lasers emit light at wavelengths from 1470nm up to 1610nm. This means that the

human eye cannot see the beam, and the blink reflex cannot protect the eye. (The human
eye can see light between 400 nm to 700 nm).

A laser beam can be harmful to the human eye (depending on laser power and exposure
time). Therefore:

Be careful when connecting / disconnecting fiber pigtails (ends).
Never look directly into the pigtail of the laser/fiber.
Never use microscopes, magnifying glasses or eye loupes to look into a fiber

end.
Use laser safety goggles blocking light at 1310 nm and at 1550 nm

Instruments exist to verify light output power: Power meters, IR-cards etc.
Flashlink features:
All the laser module cards in the Flashlink product range, are Class 1 laser products

according to IEC 825-1 1993, and class I according to 21 CFR 1040.10 when used in
normal operation.

More details can be found in the user manual for the FR-2RU-10-2 frame.
Maximum output power1: 5 mW
Operating wavelengths: > 1470 nm

Max power is for safety analysis only and does not represent device performance.

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LB-EO Rev. F

1.

The equipment will meet the guaranteed performance specification under the following
environmental conditions:

-

Operating room temperature range:

0°C to 40°C

-

Operating relative humidity range:

<90% (non-condensing)

2.

The equipment will operate without damage under the following environmental
conditions:

-

Temperature range:

-10°C to 50°C

-

Relative humidity range:

<95% (non-condensing)

General environmental requirements for Nevion equipment

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LB-EO Rev. F

Product Warranty

The warranty terms and conditions for the product(s) covered by this manual follow the
General Sales Conditions by Nevion, which are available on the company web site:

www.nevion.com

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LB-EO Rev. F

組成名稱

Part Name

Toxic or hazardous substances and elements

鉛

Lead

(Pb)

汞

Mercury

(Hg)

镉

Cadmium

(Cd)

六价铬

Hexavalent

Chromium

(Cr(VI))

多溴联苯

Polybrominated

biphenyls

(PBB)

多溴二苯醚

Polybrominated

diphenyl ethers

(PBDE)

LB-EO O O O O O O

O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is
below the limit requirement in SJ/T11363-2006.

X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used
for this part is above the limit requirement in SJ/T11363-2006.

Appendix A Materials declaration and recycling
information

A.1 Materials declaration

For product sold into China after 1st March 2007, we comply with the “Administrative

Measure on the Control of Pollution by Electronic Information Products”. In the first stage of
this legislation, content of six hazardous materials has to be declared. The table below
shows the required information.

This is indicated by the product marking:

A.2 Recycling information

Nevion provides assistance to customers and recyclers through our web site

http://www.nevion.com/. Please contact Nevion’s Customer Support for assistance with

recycling if this site does not show the information you require.
Where it is not possible to return the product to Nevion or its agents for recycling, the

following general information may be of assistance:

 Before attempting disassembly, ensure the product is completely disconnected from

power and signal connections.

 All major parts are marked or labeled to show their material content.
 Depending on the date of manufacture, this product may contain lead in solder.
 Some circuit boards may contain battery-backed memory devices.

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