The TDA10027HN is a Dual Cable Downstream Processor.
The Cable Downstream Processor (CDP) implements the physical interfaces and protocols required to provide the high quality services of an in-band DOCSIS, EuroDOCSIS, DVB, and OpenCable Set-Top Box (STB). The downstream signals are digitized by 12-bit ADC and passed to the Demod and Forward Error Correction (FEC) blocks, which do all the cable physical layer processing. This processing includes demodulating and Annex A (Europe), Annex B (US) or Annex C (Japan) FEC for the in-band data.
The Out-Of Band (OOB) receiver consists of a QPSK demodulator with FEC, compliant to SCTE55-1 and SCTE55-2 standards, with either internal MAC or POD support. Data are digitized by a 10-bit ADC.