Kathrein UFD 505 Operating Manual

Also see for UFD 505: Mode d'emploi Mode d'emploi

Contents

Kathrein UFD 505 Operating Manual Manual pdf 51 page image

Short technical lexiconAC3 Audio Coding MPEG 2/Layer 3 – the coded digital sound signal for Dolby Digital. Ittransmits 5 sound channels and one reduced sound channel for the subwoofer.DiSEqCDiSEqC (Digital Satellite Equipment Control) is a communication system betweenthe Sat receiver (master) and the peripheral Sat components (slaves), such asLNBs, multi-switch, motorised antenna systems.This is a single master/multi-slave system, i.e. there is always only one master inthe Sat system. All activities emanate from the master.DiSEqC componentsWhen DiSEqC switchover matrices are cascaded, the master receiver must sendout the DiSEqC signal several times so that all DiSEqC multi-switches in the cas-cade receive their commands.Nowadays, DiSEqC components (slaves) must be retrocompatible, i.e. they mustalso respond to the analogue switching criteria of receivers which are onlyequipped with the control signals H/V and 22 kHz.A DiSEqC switchover matrix operates with analogue switching criteria until theDiSEqC command is received from the master. All analogue switching criteria arethen ignored.DVB MPEG-2DVB is the abbreviation for digital video broadcasting. DVB-S refers to the type oftransmission (S=satellite). MPEG is the abbreviation for Moving Picture ExpertsGroup, a working group which draws up internationally valid standards for the digi-tal compression of video together with audio. MPEG-2 has been promoted to thestandard for the compression of digital TV signals. MPEG-2 operates at a data rateof up to 100 MBit/s.Eb/No ratioThe Eb/No ratio is a measure for the signal-to-noise ratio of the digital signal. Thisvalue is not identical to the C/N value as known from analogue reception technol-ogy. As a rule, reception is no longer possible at Eb/No levels below 5 dB.FECFEC is the abbreviation for Forward Error Correction. The FEC error rate corre-sponds to the viterbirate.PID The PID number (Package Identification) is an identification number for video sig-nals and audio signals in the digital data stream of DVB MPEG-2 signals. The re-ceiver uses the PID number to establish distinct allocation of the video and audiodata transmission. PID-PCR is the identification number for the synchronisationsignal. PID-PCR is normally identical to PID video. In the case of multi-languagechannel transmissions, by means of manual entry of the audio PID, it is possible toallocate another language to the TV broadcast. After entering the PID, the digitalreceiver automatically selects audio data from the data stream identified by the PIDnumber and allocates these data to the video signal.Programme packageThe programme package of a digital transponder mostly contains several TV andradio channels. Each channel package has a fixed allocation with regard to the51

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