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Demodulation of encrypted channels

The use of encryption systems is widely spread in digital pay television. the operator encodes the signals and the subscriber holds a Smart Card Giving access to those channels. The main limitation with this kind of solution is that each receiver specialises in a specific encryption system and can not be used for another system.

There is one alternative known as “Common Interface” which allows the use of standard receivers. In this case the receiver has a slot to insert various coditional access modules (CAM) and their corresponding Smart Cards. This lets the user access the digital television content of various providers, even if they use different encryption systems.

PROMAX holds a patent over the use of “common interface” in test equipment.

PROMAX è un produttore leader di sistemi di test e misura, impianti di distribuzione di segnale broadcast e TV. Le nostre linee di prodotto includono strumenti di misura per TV via cavo, TV satellitare, reti ottiche broadcast, wireless e fibra, gli analizzatori di FTTH e GPON. Modulatori DVB-T, stelle filanti IP o IP convertitori (ASI, DVB-T) sono tra i più recenti sviluppi della società.