DVB-S2, the digital transmission system makes use of advanced modulation techniques. The latest coding is incorporated in order to perform best while approaching the theoretical limit for that system. This DVB-S2 modulation system generally specifies the use of QPSK modulation. It is equipped with various latest firmwares for channel coding and error correction. The Raditek DVB-S2 modulators deliver excellent compression to the satellite. You can find four primary modulation technologies used QPSK, 8PSK, 16APSK, and 32APSK.
This advance modulation system plays a vital role in achieving excellent performance while combatting high noise and interference. ACM that is Adaptive Coding and Modulation transforms them into a frame depending on the particular conditions of delivery path. The Raditek DVB-S2 modulator also gives access to the optional backward compatible modes. It permits DVB-S receivers to continue their operation in the presence of additional capacity and services.
The high definition video signal is encoded first with a high-level H. 264 codec. The DVB-S2 satellite combines it with other satellite signals and transmits it down to the customers dish LNBs(Low Noise Block Downconverters). Sometimes, a lot of satellite signals are combined together for developing full satellite channel lineups.
In the satellite network links, Dielectric Resonator Oscillators plays a vital role. The required spectral purity of a local Dielectric Oscillators in each LNB receiver is considered an important issue. If you want to get the best architectural solution, then an LNB with built in Dielectric Resonator Oscillators will be the best option for you. This system delivers the best performance with low-phase noise.
For best phase noise, a high Q Dielectric Resonator is utilized.a recent survey has proved that Dielectric Resonator Oscillators delivers the best performance in a low-noise block down converter for EHF band satellite terminals. Moreover, it makes the LNB receivers most suitable for DVB-S2 applications.
