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€463.21
| Price | Disc. | Quantity | Validity |
|---|---|---|---|
| €463.21 | 0 % | from 1 piece |
Available
The 2xDVB-T/T2/C - 2xDVB-T (COFDM) ttx420 FTA transmodulator enables the conversion of DVB-T/T2/C signals from 2 MUXes to 2 DVB-T COFDM MUXes.
• Conversion of DVB-T/T2/C signal from 2 MUX to 2 DVB-T COFDM multiplexes
• Choice of operation: transparent or multiplexed
• Channel selection and filtering of unnecessary services in the digital stream
• Control via RJ-45 port, which greatly simplifies the installation procedure
• Internet management
• Reading the history of events (logs) from the panel
• AGC function (automatic control of signal amplification)
• Choice of operation: transparent or multiplexed
• Channel selection and filtering of unnecessary services in the digital stream
• Control via RJ-45 port, which greatly simplifies the installation procedure
• Internet management
• Reading the history of events (logs) from the panel
• AGC function (automatic control of signal amplification)
Details
The transmodulator only changes the RF transmission standard from DVB-T/T2/C to DVB-T. This means that the same RF codec is present at the input and output. The original video/audio coding systems cannot be changed and are the same at the output as at the input.
TERRA TTX-420 R81616 transmodulator is used for reception of DVB-T/T2/C signals and for change of their parameters (regeneration, filtering, retransmission in different RF channels etc.) according to the needs of the project. The device can receive whole sets of channels from two free-to-air DVB-T/T2/C multiplexes and convert them into two neighboring DVB-T multiplexes with maximum data rate allowed by the DVB-T standard, i.e. 31.68 Mbps. In practice, each multiplex can carry 6 SD channels or 2-3 HD channels. The administrator of the system selects the required channels from the satellite input streams and forms two DVB-T multiplexes. Alternatively, one DVB-T multiplex can be programmed from channels coming from two different DVB-T/T2/C multiplexes. 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 in multiplexing mode 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 channels, including HD broadcasts.
TTX-420 R81616 transmodulator is used when the error rate (high bit error rate BER and low modulation error rate MER) in the signal directly behind the antenna is high and the use of channel amplifiers or frequency converters proves ineffective and does not allow to distribute the signal in a community antenna installation. This problem occurs in areas with poor terrestrial TV signal coverage.
The TTX-420 transmodulator acts as a DVB-T/T2/C signal regenerator, improving its quality. The process consists of receiving the DVB signal, demodulating it to the transport stream and then re-modulating it with COFDM on the selected multiplex (converter function). The modulation error ratio MER at the output of the device exceeds 38 dB and allows the distribution of digital signals in the most extensive installations.
The device can operate in two modes:
- transparent mode - the decoded transport stream is not modified and is directly applied to the COFDM modulator - without PID filtration
- multiplexing mode - the device examines the decoded transport stream (measures the bit rate, updates SI arrays) and optionally filters programs and services
Thanks to RJ-45 Ethernet port, the programming of the TTX-420 R81616 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 TV programming via optical links
- other receiving and signal processing devices (broadband and channel amplifiers, analog and digital modulators)
Customers can also order DVB-T/T2/C--> DVB-C (QAM) transmodulators:
- DVB-T/T2/C to 2xDVB-C (QAM) Terra TTQ-420C (two CI slots)
- DVB-T/T2/C to 2xDVB-C (QAM) Terra TTQ-420
Key features:
- conversion of DVB-T/T2/C signals to DVB-T COFDM standard
- conversion of an entire bundle of signals from two DVB-T/T2/C multiplexes to 2 neighbouring DVB-T multiplexes
- possibility to create one DVB-T multiplex from two different DVB-T/T2/C multiplexes
- transparent regeneration of a DVB-T stream - transfers the entire package of DVB-T/T2/C multiplexes without changing the structure of the digital signal transmission
- changing the frequency of a DVB-T multiplex
- channel selection and filtering of unnecessary services in the digital stream (multiplexing mode)
- Simple control interface via RJ-45 port, which greatly simplifies the installation procedure
- Internet management
- reading of event history (logs) from the panel
- AGC function (automatic gain control)
View of the information window of TTX-420 R81616 module
(among others: input level, SNR, VBER parameters)
Selection of channels and filtration of services
With these parameters, the maximum bandwidth of each of the two DVB-T multiplexes
is 31.68 Mbps, in compliance with the DVB-T standard
is 31.68 Mbps, in compliance with the DVB-T standard
The percentage of the usage of the available bandwidth in each multiplex
Specifications
| Product type | Transmodulator | ||
| Name | ttx420 | ||
| Brand | TERRA | ||
| Conversion | DVB-T/T2/C--->DVB-T | ||
| RF input | No. of MUXes supported | 2 | |
| Number of F-connectors | 1 | ||
| Channels | FTA (uncoded) | Yes | |
| Channels | Coded (CI slot) | No | |
| Technical specifications | |||
| RF input | Frequency range | MHz | 47...862 |
| Power supply/control | DC 12 V/0,1 A | ||
| standard | DVB-T/T2/C | ||
| Modulation | DVB-T: QPSK, QAM16, QAM64, DVB-T2: QPSK, QAM16, QAM64, QAM256, DVB-C: QAM16, QAM64, QAM128, QAM256 | ||
| Channel bands | MHz | 7, 8 | |
| Symbol rate | Ms/s | 1...7,2 for DVB-C | |
| Signal strength | dBµV | 40...80 | |
| Impedance | Ohm | 75 | |
| RF throughput - gain | dB | -1 ± 1 | |
| RF output | standard | DVB-T/ISDB-T | |
| RF output | Number of DVB-T MUXes | 2 (nearby) | |
| Modulation | DVB-T: QPSK, QAM16, QAM64, ISDB-T: QPSK, DQPSK, QAM16, QAM64 | ||
| 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 | ≥38 (100...780 MHz), ≥35 (780...860 MHz) | |
| Channel bands | MHz | 7.8 | |
| Security interval | 1/4, 1/8, 1/16, 1/32 | ||
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 | ||
| FFT mode | 2K | ||
| RF output | Bandwidth | Mbps | 2 × 31,67 |
| RF combiner | Frequency range | MHz | 47...862 |
| RF combiner | Connector | F | |
| General | |||
| Configuration | Port | RJ-45 (web browser) | |
| Configuration | IP address | 192.168.1.10 | |
| Remote | Yes | ||
| Current drawn | V/A | DC 12/0.65 | |
| Operating temperature | °C | 0...+50 | |
| Weight | kg | 0.9 | |
| Dimensions | mm | 48,5 × 198 × 112 | |
