tdx480 – Convert eight SAT transponders to eight adjacent (4+4) DVB-T transponders



tdx480 – 8x Satellite Transponders to 8x Terrestrial Transponders Transmodulator
Modular reception system, Octo DVB-S/S2 – Octo DVB-T transmodulator
Converting  8x DVB-S/S2 modulated input TP signals into 8x COFDM modulated DVB-T TP signals
8x DVB-S/S2 transmodulator to 8x DVB-T channels
Terra tdx-480 DVB-S/S2 to DVB-T transmodulator is used for reception of FTA DVB-S/S2 (8PSK/QPSK) signals, selection of desired channels and re-transmission of them in COFDM format in chosen RF channels in VHF/UHF frequency range. The device allows the user to receive and manage a range of free to air satellite channels. One tdx-480 panel can receive channels from eight satellite transponders and convert them into two groups of four neighboring DVB-T (terrestrial  transponders) multiplexes with maximum bit rate of 31.66 Mbps (no PID filtering). In practice, each of the eight multiplexes can carry 6 SD channels or 2-3 HD channels. The administrator of the system selects the required channels from the satellite streams and forms eight DVB-T multiplexes. For remultiplexing the streams, it is necessary to remember about 10% safety margin when determining the maximum bit rate for the whole multiplex (typically the ultimate bit rate of a multiplex should not exceed 29 Mbps). The output DVB-T COFDM multiplexes are usually distributed to users by a passive network composed of RF splitters/taps. Such a solution is especially convenient in modern hotel TV systems distributing a variety of satellite channels, including HD broadcasts.

Thanks to the RJ-45 Ethernet port, the programming of the tdx-480 panel is performed via a web browser.
● Conversion of DVB-S/S2 signals from eight SAT transponders to eight DVB-T COFDM multiplexes
● Eight FTA SAT transponders to 4+4 adjacent DVB-T transponders
● Creation of two independent groups of four neighboring DVB-T multiplexes (in total – eight DVB-T MUXes, each with max bit rate of 31.66 Mbps)
● Software accessible via web browser using the RJ-45 port
● Integrated 2×8 multiswitch
● Selectable channels and services
● Access to event history (logs)
● Automatic gain control (AGC)
● TS processing:
─ service multiplexing – any input to any output
─ PCR restamping
─ service filtering
─ PSI/SI regeneration
─ NIT generation
─ PMT version monitoring
● BISS descrambling
● Web control and SNMP monitoring
● Loop through RF distributing at input and output
● DIN rail or wall mounting
● Robust die-cast housing
● Connectors:
─ RF input/output – type F
─ Ethernet control interface – RJ-45
─ screw terminal block for DC entry
─ power distribution bus

Technical specifications:
RF input: 
● DVB standard: DVB-S/S2 QPSK / 8PSK
● frequency range: 950-2150 MHz
● LNB powering/control: 0/13/18 V & 22 kHz, 500 mA max. DiSEqC 1.0
● level/impedance: 55-95 dBμV / 75 Ω
● modulation: QPSK, 8PSK (DVB S/S2)
● symbol rate: 2-45 Ms/s
● return loss: ≥ 10 dB
● RF input count: 2
● loop through frequency range/loss: 950-2150 MHz / ≤ 1.5 dB

RF output:
● DVB standard: DVB-T
● modulation DVB-T: QPSK, QAM16, QAM64
● frequency range: 170-230 MHz / 470-862 MHz
● channel allocation, adjacent: 4+4
● level/impedance: 90 ± 2 dBμV/75 Ω
● TS bit rate: < 31 Mbit/s
● MER: ≥ 35 dB
● channel bandwidth: 7/8 MHz
● guard interval: 1/4, 1/8, 1/16, 1/32
● code rate: 1/2, 2/3, 3/4, 5/6, 7/8
● return loss: ≥ 10 Db
● transmission mode: 2K
● total output level adjustment: 0 ÷ -15.0 dB by 1 dB step
● loop through frequency range/loss: 45-862 MHz / ≤ 2.5 dB

Transport stream parameters:
● max. bit rate output: 31670 kbps
● max. PID filter count: unlimited

Management port: standard IEE802.3 10/100 Base T
Current consumption: 12 V / 1.1 A
Operating temperature range: 0o ~ +45o C
Current consumption: 12 V / 1.1 A






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