DRX 394yJ
Single-Chip Multistandard Demodulator
General Description
Trident introduces the DRX 394yJ, the world’s smallest 8VSB and multistandard hybrid DTV demodulator.
The DRX 394yJ demodulates standard- and high-definition television signals according to ATSC A/53, the North American digital television broadcast standard and QAM 64/256 signals as specified by ITU-T J.83 Annex B. It also incorporates a high performance NTSC demodulator with BTSC stereo decoder and A2 sound support for Korea. NTSC and BTSC signals are translated from a standard or low IF input signal to baseband (CVBS) video and digital (I2S) audio outputs. An additional sound IF output is provided for maximum system design flexibility. Digital terrestrial and digital cable outputs are provided via serial or parallel transport stream interfaces.
The DRX 394yJ enables TV and STB manufacturers to provide devices that are compliant to CableLabs’ OpenCable™ initiative for Unidirectional Cable (UDC) via a point of deployment device (POD commonly called CableCard). It provides to the CableCard clock and scrambled data which the -CableCard decrypts. It also provides the necessary control signals (IF and RF AGC) and local oscillator drive for the OOB tuner.
The DRX 394yJ is based on market leading primeD® technology, which is the field-proven “ghost friendly” 8VSB demodulator IP from Trident. PrimeD based ATSC demodulators further improve performance in multipath-rich environments and ensure reliable reception under severe signal conditions. In addition to state-of-the art 8VSB performance, the integrated NTSC demodulator of DRX 394yJ also ensures continued operation of legacy analog TV applications like DVD players, VCRs, game consoles, and analog cable TV.
Designed with the complete system solution in mind, DRX 394yJ enables highly optimized adjacent channel performance by integrating a broadband input power detector. Additional features enable customers to utilize low-cost tuner options, further reducing the overall system cost.
The API-based software interface enables effortless implementation into any system. Compatibility with existing Trident ATSC receivers and other Trident demodulator products reduces engineering cost by maximizing the re-use of existing software and product experience.
Block Diagram
Block diagram of the DRX 394yJ
Key Features
Main Features
- ATSC demodulator for 8VSB with excellent multipath performance, meeting:
- ATSC Digital Television Standard A/53
- ATSC recommended practices A/74
- Brazil ensembles A, B, C, D, E
- OpenCableTM compliant digital cable demodulator supporting ITU-T J.83 Annex B (DOCSIS, OpenCable)
- Optional Unidirectional cable POD compliance
- OOB demodulator provides data and clock for CableCard implementation (POD).
- DRX3944J provides LO drive and RF/IF AGC for FDC/OOB tuner.
- Field-proven analog standard (ATV) M/N video demodulator
- Field-proven ATV M/N (BTSC/A2-Korea) audio demodulator/decoder
- FM Radio
- Integrated microprocessor provides a high-level command interface to the host processor
- Low power consumption
- Support for low IF
- Selectable I2C addresses
Interfaces
- RF and IF gain control outputs
- Parallel or serial MPEG TS output
- Analog CVBS and SIF output
- I2S digital audio output for analog TV audio
- I2C interface
- CEA909-compliant smart antenna interface
- JTAG
- GPIO
- Broadband power detector input
Applications
- DCR TV
- Low-cost DTV
- DVD-R / PVR
- STB
- PC TV
- USB TV
- Tuner NIM
Family Members
Versions
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Product brief
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