SMW LNB-LINK User manual
LNB-LINK
RF-over-Fiber transmitter
USER GUIDE
Please read and un-
derstand the contents
of this USER GUIDE
before attempting to
connect or use the
system!
1. Description
SMW LNB-LINK is a 1 channel media converter system
that allows 1 RF / L-band channel to be transmitted over
long distances as a ber signal with minimum RF-loss.
The LNB-LINK is very exible and can be used for ber
connection from a LNB to a Fiber Receiver like the
SMW VERSA-LINK or another brand of beroptic single
mode receiver.
Ideal for mounting on the satellite antenna or structure
and designed to avoid the need for bulky shelters, the
LNB-LINK is compact, weatherproof and have a wide
operating temperature range.
Other SMW RF-over-Fiber products include:
• Fiber LNBs: Fiber output integrated PLL LNBs using
single wavelength technology. Available for X-, Ku-
and Ka-Band. System together with Quattro receiver.
• VERSA-LINK: 1 channel Tx + Rx system, RF to Fiber
to RF media converter. The receiver (Rx) can be
used in combination with the LNB-LINK transmitter.
• QUAD-LINK: 4 + 1 channel RF to Fiber to RF media
converter using CWDM technology and can be used
with traditional LNBs and BUCs.It has one channel
for 10MHz ref. signal.
For full specications, please see our specications
datasheets.
Contents:
1. Description
2. Safety
3. Installation instructions
4. Troubleshooting
5. Installation example
2
2. Safety
WARNING!
The lasers used are classied as
CLASS 1M LASER PRODUCTS (Fig. 1):
Do not look directly into the laser beam,
do not view the laser beam with optical
instruments.
WARNING!
To avoid electrical shock, do not remove
covers or panels.
WARNING!
Do not immerse any part of the system in
water.
WARNING!
Only power with 12-28 V, 1 A recommended.
DC Power Supply must be Galvanically
isolated from PE Ground.
Fuse separately.
WARNING!
There are no customer serviceable parts
inside, refer service to the SMW factory.
Fig. 1
3. Installation instructions
Unpacking
Please check the contents of your shipment upon receipt towards the packing list supplied and notify us
immediately if you feel that something is missing.
SMW LNB-LINK transmitter unit come without a DC cable as it is congured to be supplied by receiver/modem.
DC power supply is not standard but can be oered on request together with a DC inserter.
As a part of the system you would also normally order a ready-made beroptic cable in a length suitable for your
installation. Huber&Suhner type Q-ODC connectors are standard, other types can be supplied as option
Mounting
Use the two pre-drilled mounting holes on the bottom plate or the DIN rail adapter plate, any other means of
mounting may void the warranty.The system components are weatherproofed and designed for operation in tem-
peratures between -40 and +80 C. The Transmitter and Receiver can normally be mounted outdoors without extra
protection.
NOTE! The weather protecting covers on the LNB-LINK Transmitter shall not be removed before installa-
tion and unused connector(s) shall be remained protected with cover(s) (Fig. 2).
However, for extreme environments such as close to corrosive salt/sea water or elevated installation in antenna
towers where IP67 class protection can be deemed insucient, it is recommended that appropriate action is taken
to ensure reliable operation and longevity.
3
Fig. 2
Wheater and dust protection cover
for ber connector.
RISK OF PERMANENT DAMAGE!
NEVER leave Q-ODC connector exposed, it will VOID WARRANTY!
Q-ODC connector is ONLY waterproof when mated with Fiber connector cover or a Q-ODC ber
cable connector, see Fig. 2.
Grounding
It is important to ground the LNB-LINK unit to avoid risk of damage.
FRONT PANEL LAYOUT
CONNECTIONS:
A - FIBER OPTIC OUT
B - RF / L-BAND IN and DC out LNB
C - RF MONITOR -20 dB OUT
D - DC POWER INPUT
E - GROUNDING SCREW
Fig. 4
Short cable with Q-ODC connectors.
D
Fig. 3
4
A
BC
E
DC (+) INNER LEAD
DC (-) CONNECTOR CHASSI
C
Fiber optic connection:
Take care when mating connectors with the units, all
beroptic connectors are polarized and should never be
forced.
Fiber cable
Ready made Fiberoptic cable assemblies, terminated
with IP67 rated, polarized, Huber&Suhner Q-ODC con-
nectors, are normally ordered from SMW with the system.
They available in several standard lengthsand can also
be supplied in customized lengths and with other termina-
tions like Q-ODC to FC-APC, Q-ODC to LC-APC or
Q-ODC to SC-APC.
A
RF / L-band connector
Your unit is equipped with one L-band connection.
Connectors are type F (option N).
• On the LNB-LINK, connect your LNB. DC power
from the DC power input (D, g 3) is fed through to
RF / L-band connector for powering the LNB. Rating
is max 1A for LNB, short circuit protected
• On the Receiver Rx, connect your RF signal receiver
for SAT signals from the LNB.
B
RF Monitor output
The RF Monitor output have a -20 dB attenuation compa-
red with the RF connector to be used for
control or measuring the level of the RF signal
Cleaning is essential!
The information carrying ber core is 9 µm in
diameter, approx. a tenth of the human hair, so
ber-optic connections are very sensitive to
impurities on the ber ends. Impurities such as dust,
bers from clothes, ngerprints etc will result in
degradation of system performance or system error.
Cleaning with an appropriate cleaning tool, such as
a “Click Pen”, is strongly recommended EVERY
TIME before reconnecting a beroptic cable.
The IBC brand “Click Pen” should be a part of any
installers’ tool kit and is available from SMW (p/n
280505-01) or can purchased locally from a well
stocked Fiberoptic supplier.
Please also refer to Huber&Suhner Application Note
”Cleaning of Fiber-optic connectors” which can be
ordered free of charge from SMW.
5
Fig. 5
Fig. 6
Connecting
Take care when mating the Q-ODC connectors with the
units, Q-ODC connectors are polarized and should never
be forced on.
MATE: Push cable plug gently into connector, rotate (a)
to nd keying position, push connector (b) until ”click” to
mate (Fig. 7).
UNMATE: Pull coupling ring to unmate(Fig. 5,6).
Fig. 7
(b)
click
(a)
Application assistance
Please feel free to contact us at an early stage for free
advise on your application or before you place an order.
You’ll nd our contact details on the back of this User Gui-
de. We welcome your enquiries:
• Fiber Optic Link Budget:
A detailed Fiber Optic Link Budget for your particular
application can be provided.
Please contact us for details.
Powering up
Once all desired connections, A through E Fig. 3, has
been made on the Transmitter;
• The ber optic cable
• The desired L-band RF connections
Each unit comes without any DC cable but a DC inserter
and power supply can be oered on request.
The DC power supply should be sized as indicated above
in this section (D). Application assitance is available,
please contact us. Contact details on last page.
6
Service
There are no user serviceable parts inside.
For factory service, contact SMW for an RMA number or
via www.smw.se before returning any material.
Materials returned without an RMA number will be
refused. Standard warranty is 36 months.
DC Power input
12-28 V DC, nom. 18V, 1A recommended as DC power
to the connected LNB is also fed through from the power
supply. Power Supply must be Galvanically Isolated from
PE Ground.
Power consumption of the LNB-LINK Transmitter is
approx. 1W / unit.
D
4. Troubleshooting
A) Many problems encountered can be associated with
impurities on the ber ends.
If your unit’s RF/ L-band signals are bad please start
by cleaning the ber ends at both ends of the cable,
see (A) above and also other ber contacts in the
ber link system, (if used). See
https://www.youtube.com/watch?v=lK_ex9Ip94Q
If cleaning does not solve the problem, then check the
DC power supply for correct voltage and polarity at the
corresponding unit’s DC input.
There is no micro processor or software inside the units.
There are no user serviceable parts or fuses inside.
B) If there is still a problem, check polarity of Fiber cables
if other cables than SMW cables are used. See Fig. 9.
NOTE! Q-ODC ”A” is connected to SC-APC ”B” and
vice verse
On the Transmitter only the left ferrule (A) seen from the
front is used normally.
On the Receiver only the right ferrule (B) seen from the
front is used normally.
7
Fig. 9
Mark
AB
AB
The RF Level from the VersaLink receiver as default*) is:
Rx_output_level = RF_input_level - (2*optical_attenuation) Contact SMW for Link budget calculation
*) Formula for default RF level. RF Level can be adjusted ± 10 dB in the LNB-LINK transmitter.
Technical specification
The easy solution for
converting an LNB
to a fiber LNB
Features
• Outdoor proof IP 67
• Wide temperature range -40 to +80° C
• Integrated Bias Tee for LNB power
• Compatible with standard 1310nm Fiber receivers
• Cost effective
• Very Low Phase Noise contribution
• Use with SMW VersaLink receiver
TECHNICAL SPECIFICATIONS
MODEL: LNB-Link Transmitter
RF Frequency 950 - 2150 MHz
Optical Output Wavelength 1310 nm
Optical Output Power 2 mW
System Gain Variation ± 0.20 dB within 30 MHz, ± 1 dB @ 950 - 2150 MHz
RF gain User adjustable, -10 dB to +10 dB,
factory set 0dB @ 100 meter fiber cable
System Noise Figure 20 dB typ. @ full gain
RF Input IP3 +33 dBm @ min. gain, +13 dBm @ max. gain
RF Return Loss min. 8 dB
System C/N, Single Carrier *) > 56 dB @ 30 MHz
System C/N, 40 transponders *) > 33 dB @ input level -15 dBm (composite level, full gain)
SFDR 115 dB / Hz
Fiber Connector Dual ber, Single mode Huber & Suhner, Q-ODC
RF Connector F-type 75Ω, option N-Type 50Ω
RF Monitor Connector F-type 75Ω, option N-Type 50Ω
DC Feed connector F-type, option N-Type
DC Input +12 to +28 V
Bias Tee for LNB DC Supply 1A, 28 V DC max. out via RF in connector for LNB
Power Consumption 1 W max. (excl. LNB Power)
Temperature Range - 40° to + 80° C, Storage & Operational
Dimensions 96 (L) x 91 (W) x 49 (H) mm, for drawing, see www.smw.se
Weight 465 g with F-connectors, 480 g with N-connectors
Ingress Protection Code IP 67, Q-ODC connector only IP67 when mated with dust cover or Q-ODC cable connector
Accessories Outdoor to indoor patch cables (Q-ODC to xx-APC)
Rev.09-20-3C
8
High RF- and optical performance
• 1 x L-band forward channel using a direct modulated DFB 1310 nm laser over a single ber cable.
• Manually adjustable Gain for large antennas and Beacon applications.
• Up to 20 km single mode ber cable distance depending on link budget.
• Free Link budget calculation support available on request.
Fully outdoor proof IP67
• Transmitter unit packaged in a compact outdoor rugged aluminium enclosure.
• -40° to +80°C fully operating temp range.
• Ideal to mount on the satellite antenna or structure, without using a bulky separate outdoor enclosure.
• Highly rugged push on, quick connect, Q-ODC ber connector on both units.
Versatility
• Easy DIN-rail mount option for stacking.
• SMW LNB-Link transmitter is compatible with SMW Versa-Link Receiver and many other manufacturer’s
corresponding beroptic receiving devices.
Applications
• Single ber downlink connection from one LNB.
• Carries any 950 - 2150 MHz LNB RF signal
9
SWEDISH MICROWAVE AB
Dynamovägen 5
S-59161 Motala
SWEDEN
Phone: +46 141 216135
info@smw.se
www.smw.se
SMW LNBL01, Rev. 03 (C) 2020-09
Specications are subject to change without notice.
General Terms: Orgalime S 2012. Products from Swedish Microwave AB are made for commercial use unless otherwise specied.
