Calian SatService sat-nms LFTRX User manual
Optical Receiver/Transmitter
sat-nms LFTRX
User Manual
Version 2.0.005
© Copyright
SatService Gesellschaft für Kommunikationssysteme mbH
Hardstrasse 9
D-78256 Steisslingen
satnms-support@satservicegmbh.de
www.satnms.com
www.satservicegmbh.de
Tel +49 7738 99791-10
Table Of Contents
1Table Of Contents ...............................................................................................................................
2sat-nms LFTRX User Manual .............................................................................................................
21 Introduction ......................................................................................................................................
31.1 Compliances .............................................................................................................................
31.1.1 CE Compliances .................................................................................................................
41.1.2 Safety compliance ..............................................................................................................
42 Installation ........................................................................................................................................
42.1 Safety Instructions .....................................................................................................................
52.2 Handling instructions for optical connectors .............................................................................
62.3 Mechanical installation ..............................................................................................................
62.4 Connecting the sat-nms LFTRX ...............................................................................................
72.4.1 DC and data connector .......................................................................................................
82.4.2 RF connectors ....................................................................................................................
82.4.3 Optical connectors ..............................................................................................................
82.5 Line-up the Optical Links ...........................................................................................................
93 Operation .........................................................................................................................................
94 Remote Control ...............................................................................................................................
95 Theory of Operation .........................................................................................................................
95.1 Frequency bands ......................................................................................................................
95.2 Connectors ................................................................................................................................
105.3 Outline Drawing .......................................................................................................................
116 Specifications ................................................................................................................................
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sat-nms LFTRX User Manual
Version 2.0.005 -- 2021-07-29 -- (C)2019-2021 SatService GmbH
Abstract
This document is the user manual provided with the sat-nms LFTRX fibre optical
receiver/transmitter module. It contains all necessary information how to install, setup, and
operate the unit.
Based on the sat-nms LFTX Optical Transmitter and sat-nms LFRX Optical Receiver for
analog multi-carrier RF transportation on fibre optical media, SatService delivers also a
transceiver module. This unit has a very compact mechanical footprint for easy integration
into existing or new system solutions. It also allows a communication equipment
manufacturer seamlessly integration of optical interfaces into its RF equipment or sub-
system.>
Table Of Contents
1 Introduction
1.1 Compliances
1.1.1 CE Compliances
1.1.1.1 EMC compliance
1.1.1.2 Federal Communications Commission (FCC)
1.1.2 Safety compliance
2 Installation
2.1 Safety Instructions
2.2 Handling instructions for optical connectors
2.3 Mechanical installation
2.4 Connecting the sat-nms LFTRX
2.4.1 DC and data connector
2.4.2 RF connectors
2.4.3 Optical connectors
2.5 Line-up the Optical Links
3 Operation
4 Remote Control
5 Theory of Operation
5.1 Frequency bands
5.2 Connectors
5.3 Outline Drawing
6 Specifications
1 Introduction
The sat-nms LFTRX fibre optical link is a high performance transmission system which transmits
a complete frequency band, with all its separate carriers, over a single mode fibre with length up
to 5km. The big advantages of fibre optical links are:
Lightning protection
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Lightning protection
Fully isolated between the two destinations
No ground loops
bug proof
The module includes a Tx and a Rx module
TX --- optical transmitter which converts from IF input spectrum to optical output at 1310nm
RX --- optical receiver which regenerates the optical signal back to an IF spectrum
SatService offer the LFTRX modules for different frequency bands.
sat-nms LFTRX-B --- 50 to 2150MHz
sat-nms LFTRX-L --- 950 to 2150MHz
sat-nms LFTRX-10 --- 10MHz only
Installation : The installation chapter guides through the installation and setup of the sat-
nms LFTRX. It describes the mechanical concept of the chassis and the assignment of the
connectors.
Operation : Operating the sat-nms LFTXR is mostly self-explanatory. Nevertheless, the
'Operation' chapter outlines the sat-nms LFTRX user interface and elaborately describes
the meaning of each alterable parameter.
Remote Control : The sat-nms LFTRX provides a versatile remote control interface. A
monitoring & control software may fully operate the sat-nms LFTRX through a analog
interface. This chapter lists all parameters accessible through the remote interface.
Theory of Operation : This chapter gives a short overview how the optical links work and
which features are supported.
Specifications : At the end of the document, the specifications applicable to the sat-nms
LFTRX are summarized in this chapter.
Support and Assistance
If you need any assistance regarding our sat-nms Optical Links, don't hesitate to contact us. We
would be pleased to help you by answering your questions.
SatService GmbH
Hardstrasse 9
78256 Steisslingen
Germany
phone +49 7738 99791-10
www.satnms.com
1.1 Compliances
1.1.1 CE Compliances
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1.1.1.1 EMC compliance
This equipment has been tested and meets the specification of following EMC standards:
EN 55032
EN 55024
FCC, part 15B
ICES003 To meet all EMC requirements it is necessary to keep with the cabling requirements
mentioned in the installation chapter.
1.1.1.2 Federal Communications Commission (FCC)
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference; in which case, users are required to correct the interference at their own expense.
Note: To ensure compliance, properly shielded cables for data, I/O and RF connections shall be
used. Use double shielded twisted pair cables for I/O connections. We recommend to use CAT7
S/FTP cable, e.g. DRAKA UC900 SS27 Cat.7 PUR. These cables have to be shielded from end to
end, ensuring a continuous shield.
For RF connections use double shielded coaxial cable like e.g. RG223.
1.1.2 Safety compliance
This equipment has been tested and meets the specification of following safety standards:
EN 62368 Every single delivered unit is tested according to EN 60950 to ensure best
possible user safety.
To meet all safety requirements it is necessary to keep with the cabling requirements mentioned
in the installation chapter.
2 Installation
This chapter describes how to install the sat-nms LFTRX Fibre Optical Link. You find a guide how
to connect, configure and mechanically mount the equipment below.
Before you start, please first read the Safety Instructions chapter below. It contains some
important recommendations to prevent damage from the equipment.
2.1 Safety Instructions
Failure to observe all Warnings and Cautions may result in personnel injury and/or equipment
damage not covered by the warranty.
The equipment described in this manual is designe d to be installed and use d by
properly trained personnel only!
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ATTENTION invisible Optical Radiation! If connected to a
power supply, the unit provides invisible Laser-radiation. The source is class 3R Laser diode
as defined in DIN EN 60825-1:2001-11. P0=2mW, Lambda=1310nm.
Never look into fibre -optical components like connectors or fibres. Use an infrared
viewer, optical power meter or fluorescent screen for optical output verification.
Do not allow any dirt or foreign material to get into the optical connector bulkheads. This
may cause damage to the polished optical connector end faces
Follow standard Electrostatic Discharge (ESD) procedures when handling a the chassis and
the modules of the LFTRX.
Select and apply the appropriate 924DC voltage according to the data sheet and
documentation before connecting power.
Install suitable overvoltage protection to ensure that no overvoltage (such as that caused by
a bolt of lightning) or overcurrent can reach the product. Otherwise, the person operating
the product will be exposed to the danger of an electric shock.
The LFTRX can be damaged if the total RF input power is higher than +10dBm specified
maximum value. Do not connect equipment where the total output power is higher than the
specified value of the data sheet or indicated on the LFTRX unit.
In case of a failure do not open the sat-nms LFTRX, you will loose warranty, call SatService
GmbH for a RMA number.
Observe normal safety precautions when operating, servicing, and troubleshooting this
equipment.
Take standard safety precautions with hand and/or power tools.
When connecting the units fault relay circuits, observe the maximum ratings: 24V D/C 50mA.
2.2 Handling instructions for optical connectors
Do not allow any kind of dust or dirt on the fibre.
Do not touch the fibre! Otherwise you will get optical attenuation and the opposite fibre in the
corresponding connector will be contaminated as well.
When installing or changing optical connections, ensure that the environment of the room
where the unit is installed is as dust-free as possible.
If you install the unit on-site, make sure that the complete work that causes dust (e.g.
plastering or concreting) is already finished and the resulted dust is cleaned up properly.
Remove the fibre protection cap of FC/APC connectors just before you connect the optical
connector.
Store the protection caps in a closable box that is absolutely dirt- and dust-free.
After disconnecting a fibre, put a dirt- and dust-free protection cap into the connector in
order to avoid dust contamination.
Before connecting, we strongly recommend to clean the fibre. We recommend to use clean
compressed air spray like e.g. 'Kontakt 334' or a special cleaning device like e.g. 'CLETOP'
or 'one click cleaner'. Do not use compressed air produced by a standard air compressor,
this air is not clean enough! If a dirty fibre (e.g. contaminated with dust) is connected to a
LFTRX unit, the internal fibre of the LFTRX unit will be contaminated as well and you will get
optical attenuation. In the worst case, the fibre-end might be irreparably damaged and has to
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be replaced.You always have to consider: optical attenuation causes a twice RF-
signal attenuation! So e.g. an optical attenuation of 2dB causes 4dB RF signal
attenuation.
2.3 Mechanical installation
The sat-nms LFTRX enclosure provide mounting holes to fix it on an base plate. To ensure
sufficient airflow for cooling the unit, we recommend to keep 30mm free space below and above
the unit. If you have not enough space for meeting this requirement, call SatService to develop a
suitable solution.
When planning the mechanical installation of the chassis, please consider that the connectors
are placed at the front and the backside of the enclosure. Depending on the flexibility of the
cables you are going to use, you will require about 10 centimetres space for cabling on both
sides of the chassis.
2.4 Connecting the sat-nms LFTRX
The connectors of the enclosure are placed on the front and on the rear side. The rear side
contains the fibre optic connectors, the front side contains the the corresponding RF In/Out
connectors and also the the DC-power and Data-connector.
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When you connect the L-Band Optical Link chassis, please consider the following:
J1 DC-Power Interface is a standard 9-pin SUB-D socket-connector. This connector contains
the alarm contacts of the internal failure open collecttor transistor, the signal monitor and the
DC-Power Supply Input. To meet mentioned EMC standards, use double shielded twisted
pair CAT7 S/FTP Network cable, e.g. DRAKA UC900 SS27 Cat.7 PUR. Take care, that cable
shielding is connected properly.
RF-In/ Out RF-Interface The input and output RF-connectors are all SMA/50Ohm female.
Use double shielded coaxial cables, e.g. RG223, only.
Optic TX/ RX Optic-Interface The fibre optic connectors are FC/APC types. It is essentially to
use single mode cables with 8° angled polish for proper function.
2.4.1 DC and data connector
The Alarm and data connectors of the sat-nms LFTRX chassis are located at the front side of the
enclosure up right. The figure below illustrates the location of the connectors and the pin out.
To meet mentioned EMC standards, use double shielded twisted pair CAT7 S/FTP Network cable,
e.g. DRAKA UC900 SS27 Cat.7 PUR, for connecting network, serial and alarm interfaces. Ensure
that the shield is connected properly.
DC Power Supply
The unit needs 9..24V DC at the corresponding pins of this interface. The LED PS shows the
presence of the power supply.
Alarm
Open collector contacts represent a fault state of the unit. With solder jumper SJ1 and SJ2 the
polarity of the alarm interface can be chosen (NC or NO at Alarm). The LED LD shows the status
of the Laser Diode Alarm (green light means current is in the current limt range (10 to 45.5mA).
The LED PD shows the status of the PIN Diode Alarm (green light means the optical level is above
220uW).
Monitoring
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The laser diode (tx) monitoring point shows the actual laser diode current. 100mV relates to
10mA laser current against GND. The pin diode (rx) monitoring point shows the actual optical
receive level. 100mV relates to 100uW optical input power against GND.
DC interface pin out
Pin Alarm contacts (DSUB-9 male) Description
1 NC not connected
2 NC not connected
3 NC not connected
4 +9..24V / 260mA@12V Power Supply Input. te .ts 5
7 TX Alarm Open Collector max. 24VDC/50mA
8 RX Optical Monitor 100uW = 100mV
9 RX Alarm Open Collector max. 24VDC/50mA
2.4.2 RF connectors
On the front side the in-/ out RF-connectors are placed.
In the standard configuration all RF-connectors are SMA/ 50Ohm female connectors.
2.4.3 Optical connectors
ATTENTION: Optical Radiation!
If connected to a power supply, the sat-nms LFTRX provides invisible laser radiation. The source
is class 3R Laser diode as defined in DIN EN 60825-1:2001-11. P0=2mW, Lambda=1310nm.
Never look into fibre-optical components like connectors or fibres. Use an infrared viewer, optical
power meter or fluorescent screen for optical output verification.
FC/APC FOL-connectors are used. They are placed on the back side of the enclosure. Pay
attention to the type of the connectors, only use single mode APC fibres with 8° angled polish.
Otherwise the connectors or the fibres might be damaged.
Do not allow any dirt or foreign material to get into the optical connector bulkheads. This may
cause damage to the polished optical connector end faces.
2.5 Line-up the Optical Links
Before lining up the optical links, you have to take care that the input signals do not exceed the
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maximum levels (see Specifications on last page of this document)!
In the standard configuration you should have approx. 4dB gain over the whole optical link. Due
to variance of laser- and receive-diodes you might have some gain-spreading between different
links.
When connecting an occasional use antenna, point your dish to the satellite with the highest total
power. This is to ensure not to generate a maximum level fault during normal operation.
3 Operation
The sat-nms LFTRX Optical Link is designed to be operated as stand-alone unit. The DC-
Interface connector allows to read out some basic alarm and and analog monitoring voltage. See
chapter DC and data connector for a detailed describtion of the signals.
4 Remote Control
The sat-nms LFTRX Optical Link is designed to be operated as stand-alone unit. The DC-
Interface connector allows to read out some basic alarm and and analog monitoring voltage. See
chapter DC and data connector for a detailed describtion of the signals.
5 Theory of Operation
The sat-nms L-Band optical transmitters and receivers were developed to cover all applications
in the field of satellite communication, satellite ground stations, VSAT and cable networks.
5.1 Frequency bands
While the fibre optical links where designed by SatService GmbH mainly for the transmission of
the satellite L-Band frequency band (950 to 2150MHz) also a broadband version from 50MHz to
2150MHz is available. So this link type can also be used to transmit the traditional 70 or 140MHz
IF bands of satellite ground stations and a microwave link. But also other terrestrial applications
are feasible like the transmission of GSM signals in the 800 and 1800MHz frequency bands.
sat-nms LFTRX-L --- 950 to 2150MHz
sat-nms LFTRX-B --- 50 to 2150MHz
sat-nms LFTRX-10 --- 10MHz only
The sat-nms LFTRX optical link is a broadband device and transmits transparently the complete
RF spectrum from one site to the other. All modulation formats, whether they are analog or digital,
can be transmitted transparently. The RF signal is directly modulated on to a high performance
laser diode and adds no phase noise or frequency instability to the original signal. The result is a
very good signal quality.
Due to the very stable design of the optical transmitter and receiver electronics there is no need
for an Automatic Gain Control (AGC) within the circuits. So the link is compared to other vendor's
solution really transparent.
5.2 Connectors
For the optical interface SatService provides FC/APC connectors from Diamond or Huber &
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6 Specifications
RF Specification
Frequency range 50 to 2150MHz or 950 to 2150MHz or 10MHz
only
L-Band Input Connectors (Transmitter) SMA female 50Ohm
Input Return Loss > 18dB
L-Band Output Connector (Receiver) SMA female 50Ohm
Output Return Loss > 18dB
Optical connectors FC/APC 8°
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Operating Wavelength 1310nm
Optical Output Power 2.2mW
Input Noise Figure < 30dB@1500MHz
Gain 4dB +/-2dB@1500MHz
Flatness
+/-1.5dB@ 950-2150MHz
+/-0.5dB@ 50-200MHz
+/-0.25dB@ any 40MHz
Gain Stability +/-0.25dB/ 24h
Input signal max +10 dBm
Intermodulation at -5dBm Input Level per
Carrier <-45dBc@1500MHz
M&C Interface Specification
Summary Fault and Monitoring Interface D-SUB 9 pin Connector
Electrical and M echanical Specification, Environmental Conditions
Temperature range storage -40 to + 75°C
Supply voltage 9 to 24V, 260mA@12V
Temperature range operational -25 to + 55°C
Humidity up to 90% non condensing
Mechanical size of mainframe 130 x 36.5 x 100 mm (WxHxD)
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