DRX 3986Z
Digital Terrestrial DTMB Demodulator
Short Description
The DRX 3986Z is a digital terrestrial DTMB demodulator. This device demodulates standard and high definition DTMB television signals according to the Chinese standard GB20600-2006. DRX 3986Z applies cutting-edge digital filtering techniques in combination with a high-performance A/D converter and PLL configuration leading to superior performance in the presence of digital and analog adjacent channels.
The demodulator supports automatic detection of single-carrier and multicarrier modes in DTMB and offers excellent receiving performance for both modes, especially in reconstructing distorted signals. In a single carrier system, this is achieved via the integrated time-domain equalizer implementing an adaptive decision-feedback algorithm. In a multicarrier system, this is done via the frequency domain equalizer in cooperation with the integrated channel estimator.
The DRX 39xyK provides significant PCB real estate benefits. Combining three demodulators into a single chip, Trident offers the world’s smallest multistandard hybrid demodulator in a QFN64 package (9×9 mm).
The DRX 39xyK is a member of the Trident DRX family, offering pin- and SW driver compatibility to the Trident DRX 394yJ (NTSC/ATSC/QAM demodulator).
Designed with the complete system solution in mind, DRX 39xyK enables highly optimized adjacent channel performance by integrating a broadband input power detector. The API-based software interface enables effortless implementation into any system. Compatibility with existing Trident demodulator products reduces engineering costs by maximizing the re-use of existing software and product experience.
Block Diagram
Features
Main Features
- High level of front-end integration and flexibility:
- Single 8 MHz SAW filter operation
- PWM RF-AGC and IF-AGC output
- Integrated high-speed 10 bit A/D converter
- High-quality PLL allows the use of a simple crystal as clock reference
- Exceptional digital reception performance:
- Full-length time domain and frequency domain equalizer guarantees the single-carrier system performance even under SFN
- Robust synchronization in the presence of the phase and frequency offset, up to 500 kHz frequency offset
- Robust timing recovery up to 100 ppm of sampling offset
- Integrated de-interleaving memory
- PMQFP64 / PMQFP128 package
- Integrated microprocessor to perform autonomous detection and operation of all possible DTMB modes without interaction with the host processor
- Comfortable software drivers, including integrated tuner support
- Configurable parallel or serial MPEG-TS output
- IEEE 1149.1 boundary scan
Applications
- IDTV / hybrid TV receivers
- Set-top boxes
- Network Interface Modules (NIM)
- USB-TV sticks
- PC-TV cards
- PVR / DVD-R