Promax Prolink 4C Premium - CN Rood

PROLINK PremiumDemodulation of free to air and encrypted digital channelsDVB Digital Channels Identifier - DCI (**)The result of demodulating a QPSK, QAM or COFDM digitalsignal is a sequence of bits so called the 'Transport Stream'.These bits are structured into packets. Some of these packetstransport compressed video, audio and data. Others containthe necessary information to access these contents. TheNETWORK, PROVIDER and SERVICE identification tablesmay be constructed out of these later packets.The information contained in these 3 tables appears in asequential way at the bottom line on the screen on measuringthe Bit Error Rate or BER.List of Services (**)Selecting the 'List of services' function information on the servicesin each multiplexor channel is displayedon-the screen.This is: service or programmename, thetype of service (television,radio, data ormosaic) and whetherthe information isencrypted or free.Free to air channels decoder (**)Once one of the availableservices listed in'DVB services' has beenselected, it may bedecoded and monitored.Video and audio PID indication (**)Another information obtained onselecting a service is the video packetidentification (PID).The PID is a personalised identifierfor each network and each programmethat is broadcasted. Itsregistration is regulated by theIn addition to the imageand audio, this screenshows information aboutthe measurement of thedigital signal along withthe NETWORK, PROVI-DER and SERVICEidentifiers.EBU (EuropeanBroadcasting Union).Encrypted channels decoder (***)The use of encryption systems is widely spread in digital paytelevision. The operator encodes the signals and the subscriberholds a Smart Cardgiving access to thosechannels. The mainlimitation with this kind ofsolution is that eachreceiver specialises in aspecific encryption systemand can not be usedfor another system.There is one alternative known as 'Common Interface' whichallows the use of standard receivers. In this case the receiverhas a slot to insert various conditional access modules (CAM)and their corresponding Smart Cards. This lets the useraccess the digital television content of various providers, evenMPEG Transport Stream input / output (***)The PROLINK-4/4C Premium have MPEG transport streaminput / output connexion through LVDS DVB-PI, D-25 parallelinterface.11The instrument alsoprovides information onthe audio PIDs.if they use different encryption systems. PROMAX holds apatent over the use of ‘common inteface’ in test equipment.(**) Except PROLINK-2 Premium(***) Only available in PROLINK-4 Premium and PROLINK-4C Premium