Terra tdx420 DVB-S/S2 to DVB-T transmodulator is used for reception of DVB-S/S2 (8PSK/QPSK/APSK) free-to-air signals, selection of desired TV channels and retransmission of them in COFDM format in 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 tdx420 module can receive channels from two satellite transponders and convert them into two neighboring DVB-T multiplexes with maximum throughput of 31.66 Mbps. In practice, each multiplex can carry 6 SD TV channels or 2-3 HD TV channels.
The transmodulator allows you to select the required TV channels from the satellite streams and combine them into two DVB-T multiplexes. Alternatively, one DVB-T multiplex can be developed from TV channels selected from two different satellite transponders. In each case, it is necessary to allow 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). When a higher throughput is required, the system should be equipped with additional tdx420 unit(s). 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 or motel TV systems distributing a variety of satellite and terrestrial channels, including HD broadcasts.
Thanks to RJ-45 Ethernet port, the programming of Terra tdx420 module is performed via a web browser.
Terra tdx420 unit is designed for receiving FTA satellite TV channels, whereas to receive encrypted TV channels, Terra tdx420C is the right model.
Key Features
- conversion of DVB-S/S2 signals from eight satellite transponders to DVB-T COFDM standard
- creation of two neighboring DVB-T multiplexes, each with max throughput of 31.66 Mbps
- selectable channels and services
- possibility to create one DVB-T multiplex from two different satellite transponders
- integration with dSCR/Unicable multiswitches
- easy configuration and control via RJ-45 port
- management via the LAN
- access to event history (logs)
- automatic gain control (AGC)
Seamless Integration
The transmodulator can integrate seamlessly with other Terra professional TV equipment such as:
- dSCR/Unicable multiswitches, allowing for independent distribution of DVB-S/S2 channels via one coaxial cable
- IPTV streamers for management and distribution of satellite, terrestrial and cable DVB channels within Ethernet (LAN) networks based on twisted-pair cabling
- optical transmitters for transmission TV programming via fibre
- other receiving and signal processing devices (broadband and channel amplifiers, analog and digital modulators)
Specification
Name: Terra tdx420
Number of supported transponders: 8
RF inputs
- Frequency range: 950 - 2150 MHz
- LNB power and control: 0/13/18 V, max 500 mA, 22 kHz, DiSEqC 1.0, EN50607, EN50494
- Level/Impedance: 45-85dBμV / 75Ω
- RF loop gain: -1 ± 1dB
- Standard: DVB-S/S2
- Modulation: QPSK, 8PSK, 8-APSK, 16-APSK, 32-APSK
- Symbol rate: 2...45Ms/s
- FEC: QPSK: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 8PSK: 3/5, 2/3, 3/4, 5/6, 8/9, 9/10
- Return loss: ≥ 10 dB
- Number of inputs: 2
RF output
- DVB standard: DVB-T
- Level / Impedance 90±2dBμV / 75Ω
- Freq. range:100-230 MHz / 470-850 MHz
- Number of DVB-T MUXes: 2 neighboring
- MER: ≥ 38 dB (100-780 MHz), ≥ 35 dB (780-860 MHz)
- Modulation: QPSK, QAM16, QAM64
- Channel width: 7 or 8 MHz
- Guard interval: 1/4, 1/8, 1/16, 1/32
- FEC: 1/2, 2/3, 3/4, 5/6, 7/8
- FFT mode:2K
- Output level adj.: 0...-15dB (step 1)
Transport Stream
- Max. bitrate: < 31Mbps/s
- Service filtering: Yes
General
- RF loop (band / loss): 47-862 MHz / ≤2.5 dB
- Ethernet port (RJ45): IEE802.3 10/100 Base T
- Power: 12V / 0.4A
- Operating temperature range: 0...45ºC
- Dimensions / Weight: 48.5x198x112mm / 0.9kg
Note
Please contact us for a free quotation - info@dnet.nz.