Binasat Communications Berhad (“BinaComms”) state of the art digital satellite services for its clients on a closed-circuit basis. The services are self-sufficient, relying on BinaComms’s own equipment and personnel, utilising C-band space segments on MEASAT-3. All equipment in the network known as DIGISAT, conforms to the Digital Video Broadcasting (DVB) standards as published by the European Telecommunications Standards Institute (ETSI).
The DIGISAT Network provides a dedicated satellite-based video, audio and data transport system utilizing DVB-S compliant equipment where each BinaComms earth station is capable of receiving and transmitting the aforesaid signals using compatible equipment.
The DVB standards used are designed with a maximum amount of commonality and are based on the ubiquitous MPEG-2 coding system. The MPEG-2 stream itself may be transmitted encrypted or in the clear, but the norm would be encrypted to ensure that the programs carried on a closed-circuit basis are not received by unauthorised viewers.
Digitization, compression and encoding of the TV signal to a MPEG-2 signal reduces the transponder bandwidth requirements without reduction in picture quality. The normal analogue requirement of a full 36MHz transponder or half transponder is reduced to 4.5MHz transponder and thus saves space segment costs. The antenna size becomes more manageable, even when operating in the C-band and this makes it possible to take advantage of a C-band signal’s relative immunity to rain attenuation.
The transmit / receive earth station consists of the following major equipment subsystem:
- 1.9 transmit and receive antenna with 2-port linear C-band feed
- Digital Video Exciter (MPEG-2 video and audio Encoder / DVB Modulator)
- Block-Up Converter
- HPA (High Power Amplifier) subsystem
- Automatic 1:1 redundancy switching with dummy load
- Loop-back monitoring system (LNB, splitter, monitoring integrated receiver decoder)
The receive only earth stations include the following major equipment subsystems:
- 3.8m to 4.9m mesh antenna
- Low Noise Block converter (LNB)
- Intergrated Receiver Decoder (IRD)
- Video and audio monitors