tdx441

Description

tdx441 – 8x DVB-S/S2 to 4x DVB-T transmodulator
tdx441 – Modular reception system, 8x DVB-S/S2 – 4x DVB-T transmodulator
Converting of 8 DVB-S/S2 modulated input signals into 4 COFDM modulated DVB-T channels

Description:
Terra tdx441 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 tdx441 panel can receive channels from eight satellite transponders and convert them into a group 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 four 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 tdx441 panel is performed via a web browser.

Features:
Eight channel DVB-S/S2 – Four DVB-T transmodulator
● Eight SAT transponders (descrambled or FTA) to four adjacent DVB-T transponders
● 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, EN50494, EN50607
● level/impedance: 55-95 dBμV / 75 Ω
● modulation: QPSK, 8PSK, APSK 8/16/32 (DVB S/S2)
● symbol rate: 2-45 Ms/s
● return loss: ≥ 10 dB
● RF input count: 1
● loop through frequency range/loss: 950-2150 MHz / ≤ 1.5 dB

RF output:
● DVB standard: DVB-T
● frequency range: 170-230 MHz / 470-862 MHz
● channel allocation, adjacent: 4
● level/impedance: 90 ± 2 dBμV/75 Ω
● TS bit rate: < 31 Mbit/s
● MER: ≥ 35 dB
● modulation DVB-T: QPSK, QAM16, QAM64
● 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: 12V-2A max
Operating temperature range: 0°C ~ +35°C

TERRA