For ISDB-T/Tb networks, an optional embedded Remux Lite software functionality is available for the adaptation of TS 188 bytes into BTS 204 signal (avoiding the need of additional equipment for conversion), as well as PID and program filtering functionalities.

Besides, Gap-Filler units can operate as transposers in MFN and as on-channel repeaters in SFN mode. For SFN scenarios, TRedess Gap-Fillers incorporate the Doppler Enhanced Echo Canceller (DEEC), an outstanding high-performance echo canceller which is able to resolve the most challenging echo conditions obtaining the most optimum RF output performance on a Gap-Filler site.

So, in conclusion, TRedess Fourth Series is a very flexible platform where several modular and built-in HW options are available that can also be combined with several SW options and SW activation licenses, allowing the unit to be very easily adapted to all possible scenarios at a Transmitter site. Also, the fact that all these optional functionalities are based on built in modules and SW options make the solution also very compact, with the very relevant cost savings this implies for the network operators in terms of site occupation and also by counting with built in functionalities (replacing the need of counting with additional external units in the system) and consequently making the system more compact and cost effective.

Cost efficiency is assured throughout the equipment lifetime minimizing OPEX, as amplifiers from 120W output power count on Ultra-Wide-Band Doherty technology. For 600W amplifiers Symmetrical and also NEW ASYMMETRICAL Doherty technologies are available.

The energy cost of a Transmitter site is one of the most relevant costs in the lifetime of a Transmitter, and for that reason, network operators worldwide are clearly paying special attention to the efficiently figures reached by the different Transmitter manufacturers, especially for the medium and high-power sites.

And TRedess has clearly understood that message and has been dedicating a very good part of our own R&D resources and R&D investment to achieve top class efficiency figures and keeping track of all the latest trends of new Doherty solutions by developing also our own new TRedess Asymmetrical Doherty solution

Both, the TRedess Symmetrical and Asymmetrical Doherty amplifiers are based on Ultra Wide Band Doherty technology, with the clear advantage of reaching top class efficiency figures and using the same power amplifier module for the entire UHF TV band (470 - 790 MHz for Symmetrical and 470 - 700 MHz for Asymmetrical). Meaning that no adjustment or power amplifier replacement is required to change the RF channel, so channel changes remain a simple configuration task. This also simplifies and reduces costs in spare partsmanagement.

In terms of efficiency levels, TRedess Transmitters based on Symmetrical Doherty feature an overall Transmitter typical thus delivering an excellent efficiency and enabling decisive energy costs reductions.

The TRedess New Doherty Amplifier of 600W based on ASYMMETRICAL Doherty technology provides in general an efficiency improvement of a 4% above the normal Symmetric Doherty solution (reaching a typical efficiency >40% for COFDM standards (43% in ATSC 1.0) with the counterpart that the frequency range is limited up to 700MH (470-700 MHz).

And although in the low power range, the efficiency figures are not so critical, it could be relevant for networks counting with a very dense low power network, so for improving also the efficiency figures hence also the costs in the lower power range, TRedess has also designed a New Ultra-Wideband Doherty Solution for the 2HU Transmitter unit, providing a 120W Transmitter UWBD featuring a typical efficiency of 32%.