We are passionate about supplying quality equipment for processing and distribution of digital TV signals in hotels and motels or any other organisations.
Digital Network Television (d.net TV) can supply all the equipment required for the reception and processing of conventional television (DTT, Satellite, and IPTV) in order to be distributed either over coaxial cable or Ethernet network.
Processing Headend Equipment
Processing headend equipment transforms the satellite television (TVSAT), digital terrestrial television (DTT) or internet protocol television (IPTV) signal reception format to adapt it to any user multimedia device (receivers, television sets, tablets, etc.). They are also compatible with coaxial, optical fibre and structured cabling distribution networks.
This equipment is dedicated to organisations which require a central management of the channels available through the TV system. In addition to the headend equipment consisting of required modules (transmodulators, amplifiers, optical transmitters, IP streamers) for receiving and converting the TV signals, the system will require the antenna assembly (satellite antennas, terrestrial TV and FM antennas) as well. No need to use more receivers (e.g. satellite receivers) for TV sets which makes this solution particularly attractive for hotels, motels and hospitals. Modular design of the TERRA headend enables the transmodulation of a wide range of source signals (DVB-S/S2, DVB-T/T2, IP, HDMI) and meeting one or more DVB-T/DVB-C/IP standards at the output, as required by the organisation.
Headends distributing satellite programs converted to digital DVB-T COFDM format are still the most popular solution used in many hotels and motels. Satellite channels can be an addition to the terrestrial television programs or be the only part of the package offered.
Transmodulators
Transmodulators are used to convert one type of digital signal (eg. QPSK, 8PSK, IP) to a new type of digital signal (eg. QAM) used in DVB-T or DVB-C transmission. The QAM modulation is optimal for cable networks and digital terrestrial transmission. It is used in hyper-band (S channels) and UHF band. Due to the need of compatibility with channel raster and transmission requirements, there are used 8 MHz channels (MPEG-2 compression, QAM modulation).
Employing MPEG-2 compression, it is possible to distribute within one physical channel up to 8 digital TV programs (similarly to sat TV), while any analog TV program, using AM modulation, occupied the entire channel.
Refer to the table below for a list of TERRA transmodulators used for conversion of satellite type modulation (DVB-S/S2) to terrestrial television modulation (DVB-T).
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| Product | tdx420 | tdx420C | tdx440 | tdx480 | tdx4168 | mix440 |
| Standard input | DVB-S/S2 (8PSK, QPSK) | IP (UDP, RSTP) |
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| No. of transponders | 2 | 2 | 8 | 8 | 16 | - |
| Standard output | DVB-T COFDM | |||||
| No. of MUXes | 2 | 2 | 4 | 8 | 8 | 4 |
| Max. bitrate [Mbps] | 2x31.66 | 2x31.66 | 4x31.66 | 8x31.66 | 8x31.66 | 4x31.66 |
| Coded channels | NO | YES | NO | |||
| CI interface | none | 2x | none | none | none | none |
IP Streamers
IPTV is a method of distributing digital TV content using computer network technologies instead of traditional methods such as coaxial cable. We offer IPTV streamers which enable distribution and management of terrestrial, cable and satellite DVB television via the Ethernet (LAN) network, through a twisted-pair cable (CAT5 or CAT6).
The table below presents Terra IP Streamers used to convert satellite (DVB-S/S2), terrestrial (DVB-T) or cable (DVB-C) QAM modulation to IP (UDP/RTP protocol).
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| Product | sti410C | sti440 | sdi410C | sdi480 |
| Input signals | DVB-T/T2/C | DVB-T/T2/C | DVB-S/S2 (8PSK, QPSK) |
DVB-S/S2 (8PSK, QPSK) |
| Number of MPTS (IN) | 1 | 4 | 1 | 8 |
| Output signal | IP | IP | IP | IP |
| SPTS/MPTS | yes | yes | yes | yes |
| Max. bitrate [Mb/s] | 100 | 200 | 100 | 400 |
| CI slot | 1x | no | 1x | no |
HDMI to IP Encoders
HDMI to IP Encoders are devices that encapsulates a video (eg. MPEG-4 AVC/H.264) and audio (eg. MPEG-1 Layer II, AAC) signal transmitted via HDMI into an IP transport stream. The input signals could be received from media players, DVDs, Blu-rays, PCs, STB decoders etc., and the output IP signal from the encoder could be applied to an Ethernet switch for its distribution among multiple receivers deployed in the wired Ethernet network. To convert HDMI signals from DVD, Blu-rays, and other STB decoders, the HDMI to IP Encoder has to support HDCP (High-bandwidth Digital Content Protection) protocols.
HDMI to DVB-T Modulators
The conversion of baseband audio-video (A/V) signals to radio frequency (RF) channel is called modulation. The process allows for the distribution of signals coming from all kinds of sources, such as computers, DVD players, security cameras etc. through antenna systems. The device used for this purpose (modulator) is equipped with one or a set of A/V inputs (HDMI) and an RF output. The output signal injected into the antenna system is available in the distribution network as an additional TV channel (or multiplex - in the case of a DVB-T modulator) that can be received by any suitable television connected to the RF network.
The HDMI to DVB-T modulators can encapsulates a video (eg. MPEG-4 AVC/H.264) and audio (eg. MPEG-1 Layer II, AAC) signal transmitted via HDMI into a radio frequency channel (RF) for terrestrial broadcasting (DVB-T).
The HDCP (High-bandwidth Digital Content Protection) protocol developed by Intel is designed to secure copyrighted multimedia files by encrypting high-definition signals, etc. HD-DVD, Blu-Ray, and thus protecting the content against copying at every stage of transmission.
Digital modulators with DHCP support cost more, but thanks to the support for the protocol, the source signals may come from a variety of devices: multimedia players, DVD or Blu-ray players, PCs, STBs. Generally, digital modulators have a number of advantages associated with the distribution of the signals in digital form (good and identical image quality in the whole network, possibility of distributing HD content, effective use of RF spectrum - several A/V signals can be distributed within one RF channel). DVB-T modulators converting the audio/video signals provided through A/V (RCA) connectors ensure the standard SD quality, and DVB-T COFDM modulators equipped with HDMI inputs can distribute over an RF network even Full HD 1920x1080_60p content.
Amplifiers
Signal amplification is used to compensate attenuation of cables. Attenuation figure depends on cable type and its length. Higher frequencies are more attenuated than lower, therefore we can observe distortion in resolution and color quality. If we want to transmit signal on long distances, we have to amplify it. However, for the reason of not uniform attenuation of lower and higher frequencies, we should use amplifiers with correction of frequency characteristic.
The best choice will probably be the digitally programmable multiband amplifier such as WWK-951, as it features the highest gain in the UHF band (up to 45 dB), suitable for distributing DVB-T multiplexes even to about 60 TV outlets, without additional amplifiers (the maximum number of outlets depends on the input signal level, cabling and passive components of the distribution system).
In larger hotels and in the case of difficult reception conditions (low signals and/or interferences from other transmitters), we recommend to use highly selective channel amplifiers from Terra.