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1.1GHz TV tuners support MoCA home net specs

Posted: 21 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:TV tuner? DOCSIS? MoCA? Microtune? MicroTuner?

When integrated into advanced 1GHz STBs, Microtune Inc.'s latest pair of 1.1GHz TV tuner chips allows cable operators to provide their customers a digital in-home network without any new wires.

Based on CableLabs DOCSIS and OpenCable specifications, the two MicroTuner chips are suitable for personal video recorder (PVR) STBs supporting the Multimedia over Coax Alliance (MoCA) specification.

According to Microtune, the MT2022 DOCSIS set-top gateway (DSG) tuner and the MT2122 analog/digital video tuner, are the first 1.1GHz tuners in the industry and are MoCA-compatible without additional filtering. They offer cable equipment manufacturers not only expanded bandwidth flexibility, but also reduced RF cost and simplified design.

The MicroTuner MT2122 is a single-chip tuner designed to enable high-performance analog and digital OpenCable PVR STBs. The MicroTuner MT2022 is a single-chip tuner designed to enable DOCSIS DSG functionality. Both devices receive signals from 48MHz to 1.1GHz, enabling operators to gain the additional spectrum to deliver complex, bandwidth-substantial services.

The MT2122 and MT2022 tuners are designed to be unaffected by transmissions in the MoCA band, providing STB manufacturers increased performance margin. Current cable STBs that employ MoCA can require expensive filtering to prevent this interference and can operate to only 860MHz, according to the company. Fabricated in silicon germanium, the MT2022 and MT2122 are dual-conversion tuners that include all active RF components, including a LNA and intermediate frequency (IF) amplifier on chip.

Currently sampling to select customers, the chips cost $5 in volume. They are available in an 8-by-8mm 56-lead MicroLead Frame package.

- Ismini Scouras

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