Technical Specifications


DVB-S/S2 broadcast and reception 

GREDOS is the family of devices focused on satellite communications launched to the market by SAPEC. It consists of two device models, an encoder with integrated DVB-S/S2 modulator GHMxx10 and an IRD (Integrated Receiver Decoder), GHRxx10. They offer the possibility of using three different transport interfaces under licences: ASI, IP and L-Band (for satellite applications). This is why they are very versatile devices that can fit in several scenarios, either for contribution or for distribution.

GREDOS GHMxx10 consists of an encoder identical to the one of the Altum II family (with all the features described in the Altum II menu) and an integrated modulator able to transmit both DVB-S and DVB-S2.

GREDOS GHRxx10 consists of a decoder and the possibility of introducing in one of its rear slots a satellite demodulator in L-Band for DVB-S / DVB-S2 in the same way.

GREDOS has the capacity to work with MPEG-2 / H.264 compressions both in standard definition (SD) and in high definition (HD). The IP interface admits both Unicast and Multicast sending and reception. It accepts UDP / RTP flows and offers the possibility of emitting and receiving FEC for error correction under the SMPTE2022 standard.

GREDOS GHMxx10 allows for working in 4:2:0 and 4:2:2 (under licence) y configure GOP, resolution, aspect ratio and bandwidths. It supports the encoding of up to 16 embedded audios and up to 4 channels in AES/EBU in MPEG-1 Layer II, MPEG-4 AAC, Dolby AC3 or Dolby EAC3 and SMPTE302M.

GREDOS GHMxx10 offers the possibility, under licence, of encrypting in BISS (both 1 and E) and Simulcrypt. In turn, the integrated DVB-S/S2 modulator provides two L-Band outputs, one for transmission and one attenuated for monitoring. It also incorporates a reference 10 MHz input and output. It allows for working with 16-QAM, QPSK, 8PSK, 16APSK and 32APSK modulations with Roll-off factors between 0.05 and 0.35 and Symbol Rates of up to 45 Msps. It supports CCM mode and different input bitrate adaptation modes (PCR adaptation, Padding insertion, Null Packet Deletion & Padding Insertion and Dummy BB Frame insertion). Internal PRBS generator.

GREDOS GHRxx10 offers the option of receiving L-Band satellite signals in one of the available slots which consists of 4 independent and configurable inputs that can receive both DVB-S and DVB-S2 and demodulate QPSK/8PSK signals (all the FEC) and 16/32 APSK (under licence) of up to 45 Msps. Licences to decrypt BISS can be purchased and it also manages the option of adding a double slot for DVB-CI. In addition to the video (HD-SDI) and audio (AES) digital outputs, it also has analogue outputs (CVBS y AA) and an HDMI output for monitoring.

GREDOS processes the entire vertical blanking interval (VBI) for Teletext, OP47, Closed Caption, AFD, WSS, etc. and allows Ancillary Data, as well as logo insertion and internal pattern generator in the GHMxx10. Both devices can be managed and configured in a simple and user-friendly manner through their front display and keyboard, Web GUI as well as complying with the SNMP v1/v2 standard.