Digital headends distributing satellite channels converted to DVB-T COFDM form have become popular solutions in hotels. The TERRA system has been designed for building TV distribution installations providing signals to standard televisions with built-in DVB-T tuners and allowing reception of terrestrial (DVB-T) and satellite (DVB-S/S2) channels without additional receivers/STBs. The output RF signals in the single DVB-T COFDM standard are distributed to outlets in rooms via typical coaxial cabling.
€485.51
Price | Disc. | Quantity | Validity |
---|---|---|---|
€485.51 | 0 % | from 1 piece |
The tdq 4202xDVB-S/S2 (8PSK, QPSK) - 2xDVB-C (QAM) FTA transmodulator enables the conversion of DVB-S/S2 signals from 2 satellite transponders to 2 DVB-C MUXes.
• Conversion of DVB-S/S2 signals to DVB-C QAM standard,
• Conversion of multiple signals from two satellite transponders to 2 neighboring DVB-C multiplexes,
• Possibility to create one DVB-C multiplex from two different satellite transponders,
• Channel selection and filtering of unnecessary services in the digital stream,
• Control via RJ-45 port, for a much simpler installation procedure,
• Web-based management,
• Reading history of events (logs) from the panel,
• AGC function (automatic control of signal gain).
• Conversion of multiple signals from two satellite transponders to 2 neighboring DVB-C multiplexes,
• Possibility to create one DVB-C multiplex from two different satellite transponders,
• Channel selection and filtering of unnecessary services in the digital stream,
• Control via RJ-45 port, for a much simpler installation procedure,
• Web-based management,
• Reading history of events (logs) from the panel,
• AGC function (automatic control of signal gain).
Details
Terra TDQ-420 R81638 DVB-S/S2 to DVB-C transmodulator is used for reception of DVB-S/S2 (8PSK/QPSK) signals, selection of desired channels and retransmission of them in QAM 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 TDQ-420 R81638 panel can receive channels from two satellite transponders and convert them into two neighboring DVB-C multiplexes with maximum throughput of 53 Mbps (no PID filtering). In practice, each multiplex can carry 8 SD channels or 4-5 HD channels. The administrator of the system selects the required channels from the satellite streams and forms two DVB-C multiplexes. Alternatively, one DVB-C multiplex can be programmed from channels coming from two different satellite transponders. In each case, it is neceeesary 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 50 Mbps). When a higher throughput is required, the system should be equipped with additional TDQ-420 R81638 unit(s). The output DVB-C QAM 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 RJ-45 Ethernet port, the programming of the TDQ-420 R81638 panel is performed via a web browser.
A great advantage of the Terra device is easy integration with other components:
- 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 of TV programming via optical links,
- other receiving and signal processing devices (broadband and channel amplifiers, analog and digital modulators).
DIPOL offers the following transmodulators of DVB-S/S2 (8PSK, QPSK) signals:
TDX-410C | TDX-420 | TDX-420C | TDQ-420 | TDQ-420C | |
![]() | ![]() | ![]() | ![]() | ![]() | |
Code | R81617 | R81618 | R81619 | R81638 | R81639 |
Input signals | DVB-S/S2 (8PSK, QPSK) | DVB-S/S2 (8PSK, QPSK) | DVB-S/S2 (8PSK, QPSK) | DVB-S/S2 (8PSK, QPSK) | DVB-S/S2 (8PSK, QPSK) |
Number of transponders | 1 | 2 | 2 | 2 | 2 |
Output signals | DVB-T COFDM | DVB-T COFDM | DVB-T COFDM | DVB-C QAM | DVB-C QAM |
Number of MUXes | 1 | 2 | 2 | 2 | 2 |
Max. bitrate [Mb/s] | 31.66 | 2x31.66 | 2x31.66 | 2x53 | 2x53 |
CI slot(s) | 1x | no | 2x | no | 2x |
Key features
- conversion of DVB-S/S2 signals (FTA) to DVB-C QAM standard,
- conversion of multiple signals from two satellite transponders to 2 neighboring DVB-C multiplexes,
- possibility to create one DVB-C multiplex from two different satellite transponders,
- selectable channels and services,
- easy control via RJ-45 port,
- management via the Internet,
- access to event history (logs),
- automatic gain control (AGC).

View of the information window of TDQ-420 R81638 module
(among others DVB-S2 input RF levels, SNR, VBER parameters)
Specifications
Product type | Transmodulator | ||
Name | tdq420 | ||
Brand | TERRA | ||
Conversion | DVB-S/S2--->DVB-C | ||
RF input | Number of supported transponders | 2 | |
Frequency range | MHz | 950...2150 | |
Power supply/control | 0/13/18 V & 22 kHz, max. 1 A,DiSEqC 1.0, EN50607, EN50494 | ||
standard | DVB-S2 | ||
Modulation | QPSK, 8PSK, APSK 8/16/32 | ||
FEC | 8PSK: 3/5, 2/3, 3/4, 5/6, 8/9, 9/10, QPSK: 1/2, 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 | ||
standard | DVB-S | ||
Modulation | QPSK | ||
FEC | 1/2, 2/3, 3/4, 5/6, 7/8 | ||
Symbol rate | Ms/s | 2...45 | |
Signal strength | dBµV | 45...85 | |
Impedance | Ohm | 75 | |
RF throughput - gain | dB | -1 ± 1 | |
RF input | Number of F-connectors | 1 | |
Channels | FTA (uncoded) | Yes | |
Channels | Coded (CI slot) | No | |
Specyfikacja techniczna | |||
RF output | standard | DVB-C/J.38B | |
RF output | Modulation | DVB-C: QAM16, QAM32, QAM64, QAM128, QAM256, J.83B: QAM64, QAM256 | |
Frequency range | MHz | 100...858, step 100 kHz | |
Signal strength | dBµV | 90 | |
Signal pos. adjustment | dB | 0...15 with step 1 dB | |
Impedance | Ohm | 75 | |
MER | dB | >40 | |
Channel bands | MHz | 4...8.3 | |
Symbol rate | Ms/s | 3.5...7.2 | |
RF output | Bandwidth | Mbps | 2 × 53 |
RF combiner | Frequency range | MHz | 47...2150 |
RF combiner | Connector | F | |
Loss | dB | 2.5 | |
General | |||
Configuration | Port | RJ-45 (web browser) | |
Configuration | IP address | 192.168.1.10 | |
Remote | Yes | ||
Current drawn | V/A | DC 12/0.55 | |
Operating temperature | °C | 0...+50 | |
Weight | kg | 0.9 | |
Dimensions | mm | 48,5 × 198 × 112 |