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Multiswitch installations for the distribution of FM/DAB+ radio signals, DVB-T2 digital terrestrial television and DVB-S/S2 satellite television to flats are both an effective supplement and an attractive alternative to traditional cable networks in multi-family buildings. The use of fibre optics in this type of installation brings numerous advantages - both technical and economic. Fibre optic installations are characterised by minimal signal loss and very high resistance to interference.
SIGNAL PRO's innovative solutions for RTV/SAT installations in multi-apartment buildings, using optical fibres and PON (Passive Optical Network) technology, are a modern alternative to classic systems based solely on coaxial cable. PON technology is based solely on passive infrastructure between the transmitter and receiver, comprising fibre optic cabling and optical splitters.
The system based on SIGNAL PRO solutions allows multiple signal splitting into up to 16 optical paths. This makes it possible to supply multiple optical receivers and multiswitches or groups of multiswitches connected to them. The system based on SIGNAL PRO devices allows for the construction of extensive hybrid optical-copper installations covering up to several dozen buildings, as well as point-to-point connections with a range of tens of kilometres. The modern system for the distribution of RTV/SAT signals is distinguished by its high quality of operation and competitive price.
Special features of the SIGNAL PRO fibre optic system:
- conversion of DVB-S/S2 (2 satellite positions) and radio/DVB-T2 signals with a single optical transmitter
- classic QUAD or QUATRO satellite converter dedicated to satellite installation definitely facilitates antenna alignment
- WDM (Wavelength Division Multiplexing) technology
- AGC - Automatic Gain Control to stabilise the signal level
- LEDs on the housing facilitate the proper configuration of the entire system
- transmitter uses single-mode optical fibre for transmission
- division of optical signal to 16 optical receivers type QUATRO
The SIGNAL PRO RTV/SAT installation system consists of the following components: transmitter, splitters, receiver and multiswitches. This system enables the reception and distribution of radio and TV signals to up to 16 reception points (16 QUATRO receivers). The transmitter is responsible for signal transmission, the splitter is used to divide the signal, the receiver enables conversion from optical to electrical signal, while the multiswitches allow for management and distribution of the signal to multiple users in community installations.
SIGNAL PRO TR-901 optical transmitter
The TR-901 (8x SAT IF+Terr) optical transmitter SIGNAL PRO R69956 supports two satellite positions, providing simultaneous optical distribution of the full SAT IF band (VL, VH, HL, HH) for each of two satellite positions and DVB-T2/terrestrial radio signals in a single optical path. The high-performance laser with a stabilised output power of 8 x 5 dBm guarantees low distortion, minimal noise and high resistance of the transmission path to external interference.
Transmitter R69956 uses WDM (Wavelength Division Multiplexing) technique, which allows to transmit signals based on eight independent wavelengths (1330 nm, 1350 nm, 1370 nm, 1390 nm, 1510 nm, 1530 nm, 1550 nm, 1570 nm), which allows to separate them and minimise mutual interferences. The TR-901 R69956 transmitter has an optical output (output power of 8x +5 dBm) terminated with SC/APC connector that allows to distribute the signal to 16 receiving points (optical receivers type QUATRO REC-109 R69958). The exact number of reception points and their maximum distance from the signal source can be determined by balancing the attenuation of the optical path with the optical power budget.
Optical splitters:
Optical splitters are components used to split an optical signal into several subnetworks. The splitter can be used in any PON application, especially in TV distribution systems based on SIGNAL PRO equipment.
REC-109 SIGNAL PRO optical receiver
The REC-109 R69958 SIGNAL PRO receiver ensures full compatibility with typical satellite multiswitches (in particular with the multiswitch series SIGNAL PRO) and allows to build point-to-multipoint structures using optical fibre signal distribution. Thanks to the high sensitivity of the optical path and the built-in output level stabilisation system, the receiver guarantees reliable operation in large building and collective installations.
Optical receiver REC-109 R69958 converts the signal from optical fibre to the copper medium. The receiver divides the full bandwidth into eight polarisation/band pairs (VL, HL, VH, HH) - analogous to the operation of two classical QUATRO converters - and into radio/DVB-T2 signals. The optical receivers are followed by standard multiswitch installation based on Signal PRO multiswitches. In the case of a larger number of multiswitches or long copper lines, it is necessary to use the R69900 bus amplifier.
SIGNAL PRO+ multiswitches
SIGNAL PRO multiswitches are installed as an element of the installation behind the optical receiver. They are designed for distribution of RTV/SAT signals in SMATV systems, enabling its distribution to many subscriber points. They ensure stable operation of the system and high quality of the transmitted signal.
Multiswitch MS-916 SIGNAL PRO, Multiswitch MS-924 SIGNAL PRO and Multiswitch MS-932 SIGNAL PRO are professional multiswitches of A class RTV/SAT signals from SIGNAL PRO series, designed for SMATV installations in multi-family buildings, hotels, offices and places where satellite and terrestrial signals have to be distributed to many receivers.
Channel amplifiers
Channel amplifiers are used for selective amplification of single multiplexes of digital terrestrial television DVB-T2 in television installations. Its task is to appropriately amplify the level of signals and equalize their power, so that the optical transmitter receives a signal with the right parameters. Therefore, a channel amplifier should be used before the signals are fed into the optical transmitter. This prevents distortion and degradation of transmission quality.
Signal PRO installation example
Optical-copper RTV/SAT installation using the professional line of SIGNAL PRO brand equipment for 256 apartments:
- satellite TV (2 satellite positions)
- terrestrial TV, radio
- distribution in 1 fibre optic fibre
- division of signal into 4 optical paths
This solution can be used in large facilities where the distance between staircases is more than a few tens of metres and you want to transmit the RTV/SAT signal in a single optical fibre. Fibre optic cable provides excellent insulation against surges. This means that any surges induced in the vicinity of the antennas will stop at the optical transmitter installed immediately behind them - all other elements of the installation are 100% protected.
The TR-901 R69956 SIGNAL PRO optical transmitter enables distribution of radio/DVB-T2 and SAT signals from two satellite positions via a single optical fibre. The built-in LEDs on the housing of the transmitter allow quick verification of the correctness of the connections and ongoing diagnostics of the network. Transmission of signals from two satellite positions is carried out using WDM technology. The 1x4 SC/APC optical splitter SIGNAL PRO A98864 is used to split the optical signal into four independent paths. The signal is then sent to the REC-109 R69958 optical receiver, which converts the signal from fibre to the copper medium. The receiver splits the full bandwidth into eight polarisation/band pairs (VL, HL, VH, HH) - analogous to the operation of two classical QUATRO-type converters - and into a radio/DVB-T2 signal. The optical receivers are followed by standard multiswitch installation based on Signal PRO multiswitches. In the case of a larger number of multiswitches or long copper lines, it is necessary to use the R69900 bus amplifier included in the diagram.
