... Constellation diagram measurement Satlink WS 6939 Digital satellite&terrestrial combo meter, DVB-S / DVB-T,satellite ... finderSpectrum AnalyzerConstellation diagram measurementDVB-TCOFDM Demodulated.Frequency range:46-870MHZlevel resistance:75 OhmDemodulations:QRSK,16QAM, ... BER, C/N, FEC SignalQuality and strength,Multi-Channel SimultaneousMeasurementAuto Fulll Frequency ScanAuto Scan of frenquency ...