Promax Prolink 4C Premium - CN Rood

PROLINK PremiumAdvanced measurements for new requirements of digital TVDigital Satellite (QPSK DVB-S)The PROLINK Premium range instruments that have thisfunction, are measuring the Bit Error Rate (BER) before andafter Viterbi. They include the DCI - Digital Channel Identifier(patented function), whichhelps to identify the selectedchannel almost instantaneously.(**)Measurement of the Bit ErrorRate before the first correction(Viterbi) is more sensitive tosmall variations in receptionquality. Measuring after Viterbiallows for comparison with the quality minimum requirementsfor DVB and defined by the QEF (Quasi Error Free) threshold.MPEG transport stream analyser (**)The 'wrong packages' function analyses in detail the MPEG-2transport stream. The analysis consists on a continuous monitoringof the packages received during a period of time andthen determining the cause of any reception problems. InDigital Terrestrial Televisión DVB-T, impairments are often dueto impulsive noise caused bytraffic and the ‘Wrong packets’function will the way to determinateor analy it.The instrument records all theerrors or events detected inthe MPEG-2 TransportStream, according to standardETSI TR 101290'Measurement guidelines for DVB systems' as defined by the'European Telecommunications Standards Institute'.It records the type of event along with the time and duration ofeach one. Also the total measuring time and the total numberof events is registered.7Digital Cable (QAM DVB-C)In digital cable, PROLINK Premium including this functionmeasures both the BER and MER error rates in QAM digitalsignals. The BER is usefull toconfirm that system measurementmeet with the DVB-Cquality limits. The MER is proportionalto signal quality andgives complementary informationwhich enables the noisemargin to be optimised. Forexample, quality of a signalwith an excellent BER can be improved with adjustment of theMER. The DCI function is included within this display.In QAM signals, it isvery valuable to analysethe constellation diagramwhich, with asimple glance, will showup any signals withnoise-related errors, IQimbalances, phase errors,etc.Satellite IF Test for network test and equalisationThis function has been designed to test the satellite IF distributionnetwork in buildings and to equalise the band beforeany signal is available. It is used in combination with theRP-050. This is a signal generatorwith 3 carriers in thesatellite IF band.With this function it is possibleto check at a glance theresponse of the system in thebeginning, middle and end ofthe band at any outlet.Terrestrial Digital (COFDM DVB-T)PROLINK Premium instruments including this function measurethe BER to contrast with DVB-T quality limits. They alsomeasure the MER, to guaranteesafety margins and good receptionin the event of changingmeteorological conditions, etc.The instrument also measuresCSI ('Channel StatusInformation') which providesvaluable additional information on the quality of the carriersmaking up a COFDM channel.In COFDM, by analysingthe constellation diagramit is possible todetect impairments inany of the thousands ofcarriers that compose aDTT signal.Digital audio measurementsThe PROLINK Premium series allows various types of measurementsto be taken on digital audio systems. This includesmeasuring the quality of NICAM digital sound.In FM radio it is possible tomeasure the quality of the RDSsignal (Radio Data System)using the EBB (Error BlockBalance) function. This functionalso allows to access informationassociated with this type oftransmission.(**) Except PROLINK-2 Premium