L-band Equipment
SatService has a long lasting experience in developing and manufacturing L-band IF equipment, modules and sub-systems for satellite ground stations. Everything started in 2005 with the development of an L-band distributor (sat-nms LRXD18), which provides as additional features LNB supply and alarm monitoring. At that time the configuration per 19inch 1RU chassis was 1 input and 8 outputs. Relatively quick the customer demand changed to two of these 1:8 distributors in one 1RU 19inch chassis which became the sat-nms LRXD28. Later also a solution for the output of a typical Ku-band LNB system was introduced to the market, sat-nms LRXD44, which integrates 4 distributor with 4 L-band outputs each in 1RU, including LNB supply. All 19inch drawer included the necessary monitoring and alarm functionality to provide LNB current monitoring capabilities and alarm outputs.
Based on these experience SatService was also in the position to realize more specialized distributor configuration, like for example sat-nms LRXD14, which has a DIN-rail module form factor and provides 1 LNB input port including a diplexer for LNB supply voltage and 10MHz reference frequency supply. The target applications here are in satellite news gathering (SNG) vans, where mechanical size is essential and in front of VSAT modems which require also the 10MHz distribution.
A more sophisticated L-band equipment is the sat-nms SMU signal management unit. The goal was here to integrate and combine different applications in one 2RU 19inch rack mount chassis. All modules can be integrated in the different slots of the chassis so that you can easily configure it to your specific requirements and quantities
The first slide in module was the universal multipurpose switch which includes 4 L-band switches which provide at each of its two input ports level monitoring and DC insertion capability for LNBs. This allows the configuration of powerful redundancy switching capabilities of RX antenna farms , fully monitored and controlled in an chassis. . As you can slide in up to 5 of these cards you are in a position to perform the redundancy switching of up to 2x5 Ku-band RX receive antennas with one chassis. This is a very powerful approach for example for IPTV or other antenna farm applications where customer want to generate a higher availability by two redundant antennas at different buildings for example.
The L-band line amplifier module includes 4 gain adjustable L-band amplifier which includes also the capability to insert DC for LNB supply and level monitoring of each L-band signal. Ideal for example in front of switch matrices.
In contrast to that the sat-nms CS24 combiner splitter modules provides qty 2 1:4 splitter. As they are passive devices they can be used in both directions which means you can also use them not only in the typical RX receive but also in TX transmit applications.
The application behind the sat-nms TMPS transfer multipurpose switch modules is a little bit more sophisticated. With these modules you can easily configure a 1:1 or 2:1 LNB redundancy switching system with full monitoring and control capability and the possibility to integrate this also in a higher level M&C monitoring and control system. If you combine two of these slide in modules in one chassis you even can enable the full redundancy switching of 2:1 WDL dual output LNBs from SMW Swedish Microwave, as these provide two L-band output ports, one for Ku low band and one for the Ku high band. Therefore you need twice transfer switches at the L-band output section of the redundancy switching.
In the meantime the SatService team has developed a huge number of different modules. Based on this experience and pool of printed circuit boards the team is in the position to react on user requirements very quickly and adapt developments to specific user requirements.
Some of these parts are also marked separately as sat-nms L-band Components. These are for examples l-band couplers, splitters in different configurations and port numbers, impedance converter from 50 to 75Ohm or vice versa and attenuators allowing the DC and 10MHz bypass.
As a conclusion, if you do not find a sat-nms product already available which matches your requirements, please do not hesitate to send us your specifications and we will check if you can quote you and adaptation.
Below you will find the datasheets and descriptions of the available sat-nms L-Band products
sat-nms LSM L-Band Switch Matrix
The sat-nms LSM L-Band Switch Matrix is a central sub-system in a satellite ground station or a teleport with several antennas. This switch matrix allows the user to switch each of its RF inputs, for example, from different antennas/LNCs, to each output, actively distributed without any blocking effects. This gives the user an unlimited routing and configuration capability.
The unit includes two power supplies with two independent mains voltage input connectors. Internal redundancy switchover between the two power supplies improves the availability of the unit. All modules are hot swappable without interrupting the users services.
In the standard configuration all RF-connectors are SMA 50Ohm female connectors. If you need other connectors, just contact us!
Example for Signal Conversion 50 to 75Ohm
SatService is able to offer the corresponding adapters and impedance transformers.Model Variants
The switch matrix is available in a lot of different configurations. The number of inputs and outputs are the maximum possible number for the corresponding model:
- 19" 3 RU: 8x8, 8x16, 8x32, 16x8, 32x8
- 19" 6 RU: 16x16, 16x32, 32x16
- 19" 9 RU: 32x32
Subsets are also possible, e.g. the LSM 1012 is a 16x16 matrix equipped with 10 input cards and 12 output cards, that can be expanded with up to 16 input and 16 outputs.
The modular design allows also larger numbers of input and output ports. Matrix systems that exeed 32x32 will be realized by a combination of n x 32x32 complete matrices..
Features
- Compact 19" design in 3, 6 or 9 RU
- High port to port isolation
- Amplitude flatness over the whole L-Band frequency range
- Dual redundant power supplies
- Front panel display and keyboard
- TCP/IP and HTTP web browser interface
- In Service expansion by card possible
- In Service exchange of cards
Applications
- Automatic measurement systems
- SNG Central Station
- TV-Uplink
- Teleport
sat-nms LRXD L-Band Distributor
The sat-nms LRXD L-Band Distributor has two functions in professional satellite ground stations. It provides the redundant supply voltage for the Low Noise Converters (LNC) and distributes the receiving signal to multiple outputs at which the satellite receivers are connected.
The compact version sat-nms LRXD-14 is designed for satellite ground terminals where a 19" rack-mount unit is not possible due to space limitations, for example, in mobile satellite news gathering terminals. The unit provides:
- An active 0dB L-Band distributor with 4 L-Band output ports with mixed 50Ohm SMA and 75Ohm F connectors
- 14/18V and 22kHz tone switching initiated by contact closure interface, LNB’s polarisation and frequency range
- An external supplied 10MHz reference is mulitplexed on the L-Band interface to the LNC if applied to 10MHz input
- The unit is powered by external 24V DC that are available in all satellite ground terminals
Internal amplifiers compensate the loss of the distribution circuit. The signal distribution is realized with cascaded Wilkinson dividers that guarantee good frequency response and isolation between the different output ports.
The models sat-nms LRXD-18, sat-nms LRXD-28 and sat-nms LRXD-116 (1RU) include two power supplies with two independent mains voltage input connectors. The internal redundancy switchover between the two power supplies improves the availabilty of the unit.
Model variants
The following versions of the sat-nms LRXD are available. All are delivered in a one HU rack drawer:
- sat-nms LRXD18-50: is connected to one LNC and provides 8 outputs with 50Ohm SMA output
- sat-nms LRXD28-50: allows the connection of two LNCs and provides per LNC 8 outputs with 50Ohm SMA output
- sat-nms LRXD116-50: is connected to one LNC and provides 16 outputs with 50Ohm SMA output
- sat-nms LRXD18-75: is connected to one LNC and provides 8 outputs with 75Ohm F output
- sat-nms LRXD28-75: allows the connection of two LNCs and provides per LNC 8 outputs with 75Ohm F output
- sat-nms LRXD116-75: is connected to one LNC and provides 16 outputs with 75Ohm F output
- sat-nms LRXD14: is connected to one LNC and provides 4 outputs with mixed 50/75Ohm and SMA/F outputs
The versions sat-nms LRXD18, sat-nms LRXD-28 and sat-nms LRXD116 equipped with two redundant power supplies are provided in an 1 HU rack-mount chassis.
Features LRXD18/28/116
- 19" 1 rack unit compact design
- One or two distributors in one unit
- Redundant power supplies
- DC free/protected outputs (no damage by IRD LNC supply voltage)
- Electronic overcurrent protection
- High and low current alarms
- Adjustable alarm threshold
- Relay contact outputs for all alarms
- Alarms can be used for redundancy switching
- Monitoring Output @ 0dB at the front panel
- LNC current monitoring
Applications LRXD18/28/116
- VSAT-HUB
- SNG Central Station
- sat-nms LRXD28 as compact design for satellite news gathering transportable stations
- TV-Uplink
- Teleports
sat-nms L-Band Components
On this page, you will get an overview of our developed L-Band Components:
L-Band Coupler
- sat-nms LC10-50: 50Ohm SMA female connectors at all in- and output ports
- sat-nms LC10-75: 50Ohm SMA female connectors at in- and output port, 75Ohm F-type female connector at the coupler output
- Both versions: very compact (75x37x30mm) with lateral press nuts for easy installation
1:2 L-Band Splitter
- sat-nms LD12-50: 50Ohm SMA female connectors at all in- and output ports
- sat-nms LD12-75: 50Ohm SMA female connectors at input port, 75Ohm F-type female connector at output ports
- Both versions: very linear frequency response and
very compact (75x37x30mm) with lateral press nuts for easy installation
1:4 L-Band Splitter
- sat-nms LD14-50: 50Ohm SMA female connectors at all in- and output ports
- sat-nms LD14-75: 50Ohm SMA female connectors at input port, 75Ohm F-type female connector at output port
- Both versions: very linear frequency response and
very compact (75x37x30mm) with lateral press nuts for easy installation
Impedance Converter
- sat-nms IC50/75: 6dB attenuation, mechanical length only 58mm, DC-Bypass as an option
- sat-nms IMCLL: Low-Loss Version, 1dB attenuation, mechanical length 130mm, DC-Bypass included
- sat-nms IMCLL-5: Low-Loss Version, array of 5 converters, 1dB attenuation, mechanical length 130mm, DC-Bypass included
- Flat mounting by press nuts possible
Both versions:
- very linear frequency response
and
- mounting in-line or with mounting clips (included in delivery)
Attenuator
- sat-nms IMCLL-5: L-Band Attenuator with DC- and 10MHz bypass
- bidirectional
- suitable for in-line mounting
- available in different versions: ATN-50-xx (xx ≙ attenuation value), e.g.: 10dB: ATN-10-50
sat-nms SMU Signal Management Unit
The sat-nms SMU is the unit you were always looking for in your satellite ground station and/or satellite head-end environment. It enables you to perform all kind of signal management in a simple to use and very flexible unit. Due to the choice of different card modules you are able to build your own sat-nms SMU best matching the requirements of your application. Each card module is designed to fulfil a specific function and the combination of different card modules gives you the possibility to solve your signal handling problems.
Features
- LNB DC Insertion
- LNB Current Monitoring
- L-Band Signal Strength / Level Monitoring
- Threshold Monitoring
- Adjustable Gain / Output Level
- Automatic Signal Backup Switching
- LNB Redundancy Switching
- Transfer Switching Capacity
- External Alarm Handling
Applications
- Satellite Ground Stations
- Teleports
- Cable Head-end Stations
The following card modules are available at the moment:
sat-nms MPC - (Multipurpose Chassis)
sat-nms MPC can be fitted with variations of different card modules. The chassis provides the remote M&C interface via web-browser, SNMP, HTTP GET functions andRS232 interface.
sat-nms LDCI - (Line Amplifier DC Inserter)
The module sat-nms LDCI (Line Amplifier DC Inserter) with integrated adjustable line amplifier, DC inserter and L-Band input level monitoring functionality is designed for professional satellite receive applications like LNB DC Insertion.
sat-nms TMPS - (Transfer Multipurpose Switch)
The module sat-nms TMPS with integrated DC inserter, IF input level monitoring, WG switch drivers and automatic switch functionality is a module designed for professional satellite receive applications like LNB Redundancy Switching Systems.
sat-nms UMPS - (Universal Multipurpose Switch)
The module sat-nms UMPS with integrated DC inserter, IF input level monitoring and automatic switch functionality is a highly sophisticated module designed for professional satellite receive applications or signal backup switching.
sat-nms CS24 - (Combiner/Splitter 2 x 1:4)
The module sat-nms CS24 is a passive splitter/combiner that provides 2 times 1:4 splitting/combining capacity.