Headend equipment distributing satellite channels after conversion to DVB-T COFDM digital form are popular solutions used in hotels. Satellite channels can be a complement to terrestrial TV broadcasts or be the main or only source of programming in the system.
Digital Terra headend can be used in a wide range of hotels, motels and other facilities with different number of rooms, including the largest ones. It is easy to extend the programming by adding more modules. Thanks to the conversion of DVB-S/S2 signals into DVB-T COFDM standard, the satellite programming can be received by regular televisions, similarly to normal DVB-T broadcasts. Both the terrestrial DVB-T broadcasts and converted satellite channels can be easily distributed to the outlets via typical TV installations based on coaxial cabling.
The 2xDVB-T/T2/C - 2xCOFDM Terra ttx420 transmodulator is used for reception of DVB-T/T2/C signals, some corrections of TS parameters (regeneration, filtering etc.) and retransmission of them in COFDM format in selected channel in VHF/UHF frequency range. It allows for distribution of digital TV channels in situations when the signal received by the antenna cannot be directly amplified or converted to a different frequency due to high BER and low MER levels. The output DVB-T COFDM multiplex with MER above 35 dB can be distributed to multiple users even within very large networks.
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2xDVB-T/T2/C - 2xDVB-T transmodulator |
2xDVB-S/S2 - 2xDVB-T transmodulator |
Four-channel amplifier (UHF, DVB-T, AGC) |
The 2xDVB-T/T2/C - 2xCOFDM Terra tdx420C transmodulator is used for reception of DVB-S/S2 (8PSK/QPSK) signals, selection of desired channels from a transponder, and retransmission of them in COFDM format in chosen channel in VHF/UHF frequency range. Built-in CI interface for conditional access modules enables the transmodulator to operate with encrypted services. In multiplexing mode, one module receives a whole multiplex (up to about 10 channels) and converts them to DVB-T multiplex with up to 5 services (max 31 PIDs) with a max throughput of 31.66 Mbps. When a higher throughput is required, the system will need Terra tdx410C module(s).
Terra at440 is a four-channel highly selective tunable RF amplifier capable of filtering, amplifying and equalizing four digital multiplexes (DVB-T) broadcast in the UHF band. Each of the four independent sections can amplify different DVB-T multiplex. The paths are equipped with automatic gain control (AGC) and ultra selective SAW (Surface Acoustic Wave) filters. The automatic gain control ensures automatic equalization of signal levels to 82 dBμV (for input levels within 50-75 dBμV range).
Below is presented a typical hotel TV system distributing terrestrial and satellite TV programming in the DVB-T COFDM standard.
The four tdx420C transmodulators are used for reception of DVB-S/S2 (8PSK/QPSK) signals, selection of desired channels from 4 transponders, and retransmission of them in COFDM format in chosen channels in VHF/UHF frequency range. The modules can be mounted on DIN rail, together with UP413 power supply (as well as they can be placed in a RACK cabinet). The configuration of the tdx420C transmodulators performed via a web browser is quite simple - scanning the selected satellite transponders and choosing the required channels.